Nu-Lec_MODBUS - Technical Manual

NU-LEC INDUSTRIES PTY LTD

A Schneider Electric Company

Modbus Protocol Technical Manual

For Automatic Circuit Reclosers And

Load Break Switches With

CAPM-4/5 Controllers

Scope This document describes the Modbus Protocol and Database Implementation on

Nu-Lec Automatic Circuit Reclosers and Load Break Switches utilising CAPM-4/5 controllers.

Document Part No: N00-665 Document Revision Level: R05

COPYRIGHT NU-LEC INDUSTRIES PTY LTD 2001

N00-665 R05 Page 1

Nu-Lec Industries Pty Ltd.

ACN 085 972 425

37 South Street,

Lytton,

QLD 4178,

Australia.

Tel +61 7 3249 5444

Fax +61 7 3249 5888

LIMITATIONS This document is copyright and is provided solely for the use of the recipient. It is not to be copied in any way, nor its contents divulged to any third party, nor to be used as the basis of a tender or specification without the express written permission of Nu-Lec Industries Pty Ltd. This document discloses confidential intellectual property that belongs to Nu-Lec Industries P/L. This document does not invest any rights to Nu-Lec Industries intellectual property in the recipient. Moreover the recipient is required not to disclose any of the intellectual property contained in this document to any other party unless authorised in writing by Nu-Lec Industries Pty Ltd.

Public Access: \stdprod\N00\Current\N00-665Rev5.pdf

Source: \R&D\CAPM4\manuals\N00-665.doc

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Revision Control

Revision Author Date Comment

R00 DPC 24/10/01 Initial revision R01 DPC 12/11/01 Alteration from first meeting 8/11/01 R02 DPC 10/05/02 Correct Loop Automation ON rejection reasons. R03 DPC 18/12/02 Add new points for Version 28.

Removed reference to Frame Timeout. R04 PJM 24/10/03 Added new appendix for CAPM2 N00-321 & N00-360 emulation.

Altered the Mapping selection field R05 PJM 28/11/03 Corrected N00-321/N00-360 Digital Status Word 2

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Content 1 Introduction..................................................................................................................................4 2 Overview......................................................................................................................................4

2.1 Data Types .................................................................................................................................4 2.2 Controls......................................................................................................................................4 2.3 Terminology...............................................................................................................................4 2.4 LBS vs ACR Point Mapping. ....................................................................................................5 2.5 Password Protection...................................................................................................................5

3 Applicability ................................................................................................................................5 3.1 Control Cubicle Software ..........................................................................................................5 3.2 Modbus Protocol Definition ......................................................................................................5 3.3 Switchgear Type ........................................................................................................................5

4 Year 2000 Compliance Statement ...............................................................................................5 5 Protocol Configuration.................................................................................................................5

5.1 Protocol Parameter Configuration .............................................................................................6 6 Physical Layer..............................................................................................................................6

6.1 Communications Ports Supported..............................................................................................6 6.2 RS-232 Communication Specifications.....................................................................................6

6.2.1 RS-232 Hardware Signals............................................................................................6 6.2.2 RS-232 Character Definition .......................................................................................7 6.2.3 Communication Configuration Parameters..................................................................7 6.2.4 RS-232 Configuration..................................................................................................7

6.3 V23 FSK Communication Specifications..................................................................................9 6.3.1 V23 Hardware Signals .................................................................................................9 6.3.2 V23 Configuration Parameters ..................................................................................10 6.3.3 V23 Handshaking Signals..........................................................................................12

6.4 Communication Statistics ........................................................................................................12 Appendix A Protocol Timings ...........................................................................................................14 Appendix B Modbus Implementation Table......................................................................................15 Appendix C - ACR Modbus Points ...................................................................................................16 Appendix C.1 ACR Modbus - Digitial Inputs ...................................................................................16 Appendix C.2 ACR Modbus - Analogue Inputs................................................................................34 Appendix C.3 ACR Modbus - Digital Control ..................................................................................42 Appendix C.4 ACR Modbus - Analogue Control..............................................................................47 Appendix D LBS Modbus Points ......................................................................................................48 Appendix D.1 LBS Modbus - Digital Inputs .....................................................................................48 Appendix D.2 LBS Modbus - Analogue Inputs.................................................................................55 Appendix D.3 LBS Modbus - Digital Control...................................................................................61 Appendix D.4 LBS Modbus - Analogue Control ..............................................................................64 Appendix E CAPM2 Modbus Point Map ..........................................................................................65 Appendix E.1 Data Available over Modbus ......................................................................................65 Appendix E.2 Controls Available over Modbus................................................................................68 Appendix F CAPM2 N00-321 and N00-360 Modbus Point Map .....................................................69 Appendix F.1 Data Available over Modbus ......................................................................................69 Appendix F.2 Controls Available over Modbus ................................................................................72

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1 Introduction This document describes the Modbus implementation for Nu-Lec Automatic Circuit Reclosers (ACRs) and Load Break Switches (LBSs) on Control and Protection Module types 4 & 5 (CAPM). For more information about the Automatic Circuit Recloser or Load Break Switch refer to relevant technical manual for your switchgear type.

2 Overview The Nu-Lec CAPM controller combines the functions of protection relay and switchgear controller into a single intelligent electronic device (IED). The controller provides a user friendly operator interface on a four line LCD control panel which allows configuration and control of the switchgear and configuration of the Modbus Protocol, refer section 5.1. Electricity supply utilities frequently link the controller into their SCADA systems as a Remote Terminal Unit (RTU). To make this simple the controller provides….

• Mounting room for a radio or modem in the control cubicle. • Power supply for the radio or modem in the control cubicle. • Embedded protocol handler for the required SCADA protocol in the controller firmware.

This document describes the embedded Modbus protocol handler for the CAPM4/5 controller.

2.1 Data Types The Modbus protocol handler supports the following data exchange between the CAPM4/5 and a SCADA system Master Station.

• Digital Inputs • Analogue Inputs • Digital Control • Analogue Control

More information is given in later sections.

2.2 Controls A list of the controls supported by the protocol handler is detailed in Appendix C.3 and Appendix D.3. All digital controls have a corresponding digital input. The master station must use these input points to verify that the control action has been successful. Sometimes a control will be rejected because of an underlying CAPM condition preventing the action. These conditions are detailed in the table in the appendices. The Modbus protocol handler triggers two events that are recorded in the CAPM event log - “Modbus Trip Req” and “Modbus Close Req”. This event log reporting indicates only that the protocol handler has requested a trip or a close from the CAPM. It does not necessarily mean that the action has been taken. The Modbus protocol handler is designated as a remote user. Refer to the equipment manual for more information.

2.3 Terminology The terminology used in this document is that Earth Fault or Ground Fault is described as Earth / Ground Fault and Sensitive Earth Fault (SEF) or Sensitive Ground Fault (SGF) is described as SEF/SGF. Also, bushing terminology used in this document is for U and W series switchgear ie I and X for the switchgear terminals. On N or RL series switchgear the 1 side is described as I and the 2 side is described as X. Also note that the phase terminology is ABC and refers always to the phase set by the Terminal Designation or “Phasing” option, never to the physical bushing or terminal on the switchgear.

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2.4 LBS vs ACR Point Mapping. The Modbus protocol handler supports independent point maps for the ACR and LBS switchgear types. The mapping for each is listed in the appendices. The type supported by the protocol handler is firmware dependant and determined by the CAPM on power up. If the incorrect configuration is supplied please refer to Nulec Industries or your distributor.

2.5 Password Protection All Modbus panel fields require password entry unless described as ‘Display only’ or otherwise stated. For more information on operator control panel usage refer to the equipment manual.

3 Applicability 3.1 Control Cubicle Software This document applies to Nu-Lec pole top reclosers using a CAPM Controller which displays “Modbus Protocol Manual N00-665 R05+” on the controller capability pages. To find these pages refer to the main equipment manual.

3.2 Modbus Protocol Definition The protocol version implemented by Nu-Lec is Modbus and is described in the following document: -

• 'Gould Modbus Protocol Reference Guide', PI-MBUS-300 RevB, January 1985 The Modbus protocol handler implements a sub-set of the complete Modbus protocol definition. The subset of Modbus communication function codes that are supported are listed in Appendix B. This sub-set allows a Modbus master station to poll a Nulec recloser and:

• scan the current values of inputs, holding registers • force logic coils • preset holding registers

3.3 Switchgear Type Applicable to the following switchgear types:

• N-Series ACR, all models with CAPM-4/5 controllers. • U-Series ACR, all models with CAPM-4/5 controllers • W-Series ACR, all models with CAPM-4/5 controllers • RL-Series LBS, all models with CAPM-4/5 controllers

4 Year 2000 Compliance Statement The Modbus protocol software complies with rules 1, 2, 3 and 4 of the British Standards Institute Year 2000 Conformity Requirement (DISC PD2000-1 A Definition of Year 2000 Conformity Requirements). A copy of this statement can be found on the Nu-Lec Industries Pty Ltd web site (http://www.Nu-Lec.com.au/).

5 Protocol Configuration The Modbus protocol handler adds several pages to the “System Status” menus. The additional pages fall into the following groups,

• Protocol Parameter Configuration • Communications Parameter Configuration • Communications Statistics

All protocol configuration parameters can be viewed, modified and stored on a personal computer with the WSOS utility.

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5.1 Protocol Parameter Configuration These pages allow the SCADA engineer to configure the Modbus protocol parameters.

---- Modbus Protocol Configuration 1 ---

RTU Address 1 Framing RTU

Mapping NORMAL

Parameter Description RTU Address RTU Address

The station address of this unit on the communication link. Range 1 to 247 Factory default is 1

Framing Framing Type Display only. Transmission mode used by RTU.

Mapping Database Point Mapping The point map provided by the CAPM. The range is CAPM4/5 ACR (Refer to Appendix C) CAPM4/5 LBS (Refer to Appendix D) CAPM2 424 (Refer to Appendix E) CAPM2 321 (Refer to Appendix F) CAPM2 360 (Refer to Appendix F) Default: CAPM4/5 ACR

6 Physical Layer 6.1 Communications Ports Supported The CAPM can communicate to the Master station via one of the following ports.

• RS-232 Port P8 • V23 FSK Port P10

6.2 RS-232 Communication Specifications

6.2.1 RS-232 Hardware Signals P8 Pin Direction Description

2 From CAPM Tx Data (TxD) 3 To CAPM Rx Data (RxD) 4 From CAPM Request To Send (RTS) 5 To CAPM Clear To Send (CTS) 7 - Signal Ground 8 To CAPM Carrier Detect (CD)

20 From CAPM Data Terminal Ready (DTR) Note: The CAPM uses RTS/CTS hardware handshaking. If not supported by the master then a loop back is required at the CAPM end of the communication cable.

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6.2.2 RS-232 Character Definition RS-232 characters are 8 bit, with 1 stop bit. Parity is optional, and can be configured to either none, odd or even.

6.2.3 Communication Configuration Parameters The following communications configuration pages allow the user to specify parameters required for operation of the physical link between the recloser and the master station.

-------- Modbus Communications 1 ------

P8 RS-232 RUNNING

Pre-Tx 250ms Post-Tx 35ms

Parameter Description

OFF P8 RS-232 P10 V23

Port Selection This field selects the communications medium the Modbus protocol uses for transmission. When OFF is selected, the protocol handler is disabled. When P8 RS–232 is selected, the protocol handler uses the P8 serial port for all data. Also, the Modbus Communications 1 and 2 pages are automatically updated to reflect relevant RS-232 data as detailed below.When P10 V23 FSK is selected, the protocol uses the built in V23 modem on P10. Also, the Modbus Communications 1 and 2 pages are automatically updated to reflect relevant FSK data. Refer to section 6.3 for the P10 configuration details. Range: OFF, P8 RS-232, P10 V23 Factory default is P8 RS–232

RUNNING INACTIVE

Protocol Status Indication of the current status of the communications. (Display only) RUNNING means that the protocol handler has connected to the communication port (P8 or P10) and is running. INACTIVE means that the protocol handler has been disabled via the OFF state above or has been unable to connect to a communication port. This is usually caused by another application already having exclusive access to the port. Range: INACTIVE, RUNNING

Pre-Tx Pre-Transmission Period The time delay between keying RTS to when the message starts. Range: 50 to 1000 ms. Factory default is 250 ms

Post-Tx Post-Transmission Period The time after the last character is sent before RTS is negated. Range: 0 to 1000 ms. Factory default is 35 ms

6.2.4 RS-232 Configuration The following communications configuration pages allow the user to specify parameters required for operation of a RS-232 / Modem physical link between the recloser and the master station.

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Parity EVEN

DCD Ignore

Baud 9600

Parameter Description Parity Communication Parity

Determines the parity of the communication port. Range: NONE, ODD, EVEN Factory default is EVEN

DCD Ignore DCD Don’t Ignore

DCD Usage If the modem does not support a Data Carrier Detect (DCD) signal this parameter should be set to DCD Ignore. Even if the modem does support a DCD signal this parameter is usually set to DCD Ignore. This is because most point-point systems using conventional modems run as full duplex so that the DCD is always asserted during normal operation. When set to the ‘Ignore’ mode, the protocol uses any received data to build an incoming packet irrespective of DCD input signal. Also the protocol will transmit irrespective of the DCD input signal. If the modem supports a Data Carrier Detect (DCD) signal this parameter can be set to DCD Don’t Ignore. When set to this mode, the protocol will only read data and build an incoming protocol packet when DCD is asserted. In addition, the protocol will not transmit when DCD is asserted. This is necessary for multi-dropped systems or ones shared with voice users or some radio-modems. Range: DCD Ignore, DCD Don’t Ignore Factory default is DCD Ignore

Baud Communications Baud Rate Range: 300, 1200, 2400, 4800, 9600 or 192001 baud. Factory default is 9600 Baud


Pre-amble DISABLED First Char 0x55

Repeat First 3 Last Char 0xFF

Parameter Description

Pre-amble

Preamble Usage Determines whether the protocol transmits some preamble characters prior to the start of a protocol message. The message itself is not otherwise modified. Some modems require these characters to assist with message reception and synchronisation at the master station. Start of frame filtering at the master station ensures identification of the protocol

1 19200 baud is not available on CAPM4 controllers

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ENABLED DISABLED

message. ENABLED means that the preamble characters are transmitted prior to a protocol message. DISABLED means that protocol message are transmitted without any preamble characters. Range: ENABLED, DISABLED Factory default is DISABLED

First Char Preamble First Character This is the first character to be transmitted as a preamble. The character is specified by entering its ASCII code in hexadecimal format. Range: is 0 to FF hexadecimal. Factory default is 0x55

Repeat First Number of Preamble First Characters This is the number of times the first character will be repeated as part of the preamble. Eg if all preamble settings are at default values then the preamble sent is 0x55, 0x55, 0x55, 0xFF Range: 0 to 20. Factory default is 3

Last Char Last Preamble Character This is the last char that will be sent as part of the preamble. The character is specified by entering its ASCII code in hexadecimal format. Range: is 0 to FF hexadecimal. Factory default is 0xFF

6.2.4.1 Carrier Detect When “DCD Ignore” is configured, the Data Carrier Detect (DCD) input is not used. All data is received and transmitted irrespective of the state of the DCD signal. When “DCD Don’t Ignore” is configured, the CAPM will not begin to transmit a packet until DCD is negated, and will only receive data when DCD is asserted. Refer to the DCD Usage parameter description for more information. 6.2.4.2 Transmitting a Modbus Message Transmission of a Modbus packet follows the steps below

1. RTS line is asserted 2. CAPM waits until the pre-transmission delay expires (Delay set from the panel) 3. Checks CTS is asserted. 4. The pre-amble is transmitted (Optional. Set from the panel). 5. Checks CTS is asserted. 6. The Modbus packet is transmitted 7. Waits until the post-transmission delay expires (Delay set from the panel) 8. RTS is negated

6.2.4.3 DTR DTR is asserted by the Modbus protocol handler at power-up and remains asserted.

6.3 V23 FSK Communication Specifications

6.3.1 V23 Hardware Signals

Standard Cable Type N03-530

P10 Pin Direction Use

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15 Way D Female 5 5 - Signal Ground 4 4 To CAPM Receive, 10kOhm impedance

Sensitivity 0.1V to 2V pk-pk 15 15 From CAPM Press To Talk (PTT) 11 11 From CAPM Transmit, 600 Ohm impedance

Level 2.5V pk-pk 6 6 To CAPM Busy, 10kOhm impedance

Signal frequencies conform to V23 standard. The protocol only supports half duplex (ie receive and transmit can not occur at the same time) when using the V23 port. All transmissions are 1200 baud, 8 bit, and one stop bit. Parity is configurable.

6.3.2 V23 Configuration Parameters The Modbus communications configuration page allows the user to specify parameters required for operation of the physical link between the recloser and the master station.

------- Modbus Communications 1 ------S

P10 FSK V23 RUNNING

Pre-Tx 250ms Post-Tx 35ms

Tx NORMAL Parity EVEN


Busy Disabled

Busy when input low

Busy Idle


Pre-amble DISABLED First Char 0x55

Repeat First 3 Last Char 0xFF

Parameter Description OFF P8 RS-232 P10 V23 FSK

Port Selection This field selects the communications medium the Modbus protocol handler uses for transmission. When OFF is selected, the protocol handler is disabled. When P8 RS –232 is selected, the protocol uses the P8 serial port for all data. Also, the Modbus Communications 1 and 2 pages are automatically updated to reflect relevant RS-232 data. Refer to section 6.2 for the P8 configuration details. When P10 V23 FSK is selected, the protocol uses the built in V23 modem on P10. Also, the Modbus Communications 1 and 2 pages are automatically updated to reflect relevant FSK data as detailed below.

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Range: OFF, P8 RS-232, P10 V23 FSK Factory default is P8 RS-232

RUNNING INACTIVE

Protocol Status Indication of the current status of the communications. (Display only) RUNNING means that the protocol handler has connected to the communication port (P8 or P10) and is running. INACTIVE means that the protocol handler has been disabled via the OFF state above or has been unable to connect to a communication port. This is usually caused by another application already having exclusive access to the port. Range: INACTIVE, RUNNING

Pre-Tx Pre-Transmission Period The time delay between keying PTT to when the message starts. During this time a logic 1 is sent. Range: 50 to 1000 ms. Factory default is 250 ms

Post-Tx Post-Transmission Period The time after the last character is sent before PTT is negated. During this time a logic 1 is sent. Range: 0 to 1000 ms. Factory default is 35 ms

Tx NORMAL Tx TEST

Transmission Mode This field can be used to test the radio transmitter. Tx NORMAL means that the protocol handler controls the radio for normal Modbustransmissions. Tx TEST means that the protocol handler will send continuous text strings of “TX TEST”. This string is transmitted as an asynchronous message with 8 bit, no parity, 1 stop bit, 1 start bit format. Range: Tx NORMAL, Tx TEST Factory default is Tx NORMAL.

Busy Idle Busy Asserted

BUSY Signal Status The status of the BUSY signal into the CAPM (Display only) “BUSY Idle” indicates that the signal is in the ‘not BUSY’ state. “BUSY Asserted” indicates that the signal is in the ‘BUSY’ state. This usually means that the radio squelch has opened. Range: Busy Idle, Busy Asserted

Busy Disabled Busy Enabled

Busy Signal Usage The “Busy Disabled” mode is used when there is no busy signal available. Eg A twisted pair link. When set to this mode, the protocol uses any received data to build a Modbus frame. The protocol is able to transmit at any time. The “Busy Enabled” mode is the normal operating mode for radio systems that have a busy signal available. When set to this mode, the protocol will only read data and build Modbus frames when busy is asserted. In addition, the protocol will not transmit when busy is asserted. This reduces clashes with voice users. Range: Busy Disabled, Busy Enabled Factory default is Busy Disabled

Busy when input low Busy when input

Polarity of Busy Signal This field determines the polarity of the input signal from the radio (P10 pin 6) that the CAPM uses as BUSY. “Busy when input low” means that a low input signal will assert BUSY. “Busy when input high” means that a high input signal will assert

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high BUSY. Range: Busy when input low, Busy when input high. Factory default is Busy when input low

Pre-amble ENABLED DISABLED

Preamble Usage When ENABLED the protocol handler inserts a string of characters in front of a message packet. The message frame is otherwise not affected. Start of frame filtering at the master station will ensure identification of the message. This parameter is sometimes required for modems to aid with their keying. When DISABLED the protocol handler does not insert any preamble characters. Range: ENABLED, DISABLED Factory default is DISABLED

First Char Preamble First Character This is the first character to be transmitted as a preamble. The character is specified by entering its ASCII code in hexadecimal format. Range: is 0 to FF hexadecimal. Factory default is 0x55

Repeat First Number of Preamble First Characters This is the number of times the first character will be repeated as part of the preamble. Eg if all preamble settings are at default values then the preamble sent is 0x55, 0x55, 0x55, 0xFF Range: 0 to 20. Factory default is 3

Last Char Last Character of Preamble This is the last char that will be sent as part of the preamble. The character is specified by entering its ASCII code in hexadecimal format. Range: is 0 to FF hexadecimal. Factory default is 0xFF

6.3.3 V23 Handshaking Signals The V23 interface uses two signals, PTT from the CAPM, and Busy to the CAPM. The PTT signal is used to key up a half-duplex radio transmitter. At the start of transmission the CAPM asserts the PTT line and signals logic 1 for the pre-transmission time. It then transmits the data blocks. Once the data has been sent it asserts logic 1 for the post-transmission time and then negates PTT. Some radio systemsdo not require a PTT signal. The Busy signal can utilise the squelch signal from a radio that indicates that the channel is busy. If the communications equipment does not have such a signal then “Busy Disabled” should be selected. If a busy signal is available then the “Busy Enabled” should be set. In this mode the polarity of the busy signal must be correctly set to match the operation of the radio. This is done with the “Busy when input high/low” parameter. When “Busy Enabled” is selected and Busy is asserted the protocol handler will…

• Process all characters coming in on the receive line and attempt to decode these as Modus frames. This prevents attempting to process channel noise in the absence of radio carrier.

• Delay all transmissions until Busy is negated. This avoids clashes with other channel users.

6.4 Communication Statistics The communication statistics give communication information, such as CRC errors, bytes not being sent, received or processed or frames being incorrectly addressed. The communication statistics page appears as below:

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--- Modbus Communication Statistics ---

Tx Count OK 582 Rx Count OK 582

Rx Protocol Error 0

Statistic Description

Tx Count OK Transmission Message Count The number of messages transmitted from this recloser into the communication link. Range: 0 to 99999

Rx Count OK Receive Message Count The number of messages received by this recloser from the communication link. Range: 0 to 99999

Rx Protocol Error Receive Message Protocol Error Count The number of messages received with protocol related errors such as CRC or parity. Range: 0 to 9999

All of the above counters are zeroed when the CAPM is reset or the reset all button is selected in Windows SOS. Any field can be cleared individually via the control operator panel by selecting it and pressing either the left or right keys. All communication statistic parameters are not password protected.

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Appendix A Protocol Timings Initialisation Time The protocol handler will not respond to master station requests for several seconds after power up whilst it waits for the CAPM database to be initialised and for high priority boot up tasks to be completed. Turnaround Time The turnaround time for the protocol, from the end of receiving a message until the start of the pre-transmission time, is typically < 30 milliseconds with a range of 5 to 100 milliseconds. Latency of Data The protocol task examines the real-time database every 500 milliseconds to see if anything has changed and to construct the underlying protocol database that is sent to the master station. This introduces a delay between the actual event and updating the protocol database of up to 500 milliseconds. This is the data latency.


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Appendix B Modbus Implementation Table This version of the Modbus protocol handler implements the following sub-set of the Modbus function codes:

Supported Function Codes

Function Code Dec Hex Meaning Support 01 01 Read Coil Status ( Read Discrete Output ) No 02 02 Read Input Status ( Read Discrete Inputs ) Yes 03 03 Read Holding Registers ( Read Multiple Registers ) Yes 04 04 Read Input Registers No 05 05 Force Single Coil ( Write Single Output ) Yes 06 06 Preset Single Register ( Write Single Register ) Yes 07 07 Read Exception Status No 08 08 Loopback Diagnostic Test No 09 09 Program No 10 0A Poll Program Complete No 11 0B Get Communications Event Counter No 12 0C Get Communications Event Log No 13 0D Program No 14 0E Poll Program Complete No 15 0F Write Multiple Outputs No 16 10 Write Multiple Registers No 17 11 Report Slave ID No 18 12 Program No 19 13 Reset Communications Link No 20 14 Read General Reference No 21 15 Write General Reference No

Mode of Transmission This implementation of the Modbus protocol uses the Remote Terminal Unit (RTU) Framing. Exceptions A read of a non-existent coil or register will return an exception. Broadcast Messages Broadcast messages are not supported. A slave address of zero is invalid.


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Appendix C - ACR Modbus Points Appendix C.1 ACR Modbus - Digitial Inputs These points show the state of the switchgear and/or the controller. The phase designation A, B, C is determined by the user, refer to the equipment manual for more information. Phase terminology is explained in section 2.3. W series support is indicated below by a ‘Y’. If indicated as ‘N’ then value is always OFF. Modbus Implementation Request Code(s): 02 (Read Input Status) Reply Codes(s): 02 (Read Input Status) Error Code: 0x82 Exception Code: 01 (Illegal Function), 02 (Illegal Data Address), 03 (Illegal Data Value), 04 (Slave Device Failure) ACR Recloser and Controller State Flags

Bit Name

W S

erie

s

Set = ‘1’ Cleared = ‘0’ Comment

0 Abnormal Operator conditions

Y For any of the following conditions:- • Trip or Close

Isolated, • ACR

Mechanically locked open (if applicable)

• Work Tag Applied

None of the specified conditions are true

This flag shows that the operator has the ACR in an abnormal state such as “work tag applied”. This means that it will operate differently to its normal mode of operation.

1 Maintenance Required Y For any of the following conditions:- • Battery not normal • Capacitor charge

failure • Low power mode • Low SF6 gas

pressure (if applicable)

• ACR data not valid (includes connection to an invalid switch type)

• Any vacuum interrupter contact life is less than 20%

• Mechanical failure

No maintenance required

The controller has detected one or more conditions which require maintenance. This point cannot become Set until at least five minutes after controller start.

2 Auxiliary Supply Fail

Y Auxiliary supply has failed

Auxiliary supply is normal


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Bit Name

W S

erie

s


3 Control Mode Y Local Control Enabled Remote Control Disabled

Local control Disabled Remote control Enabled

The controller is either in Local or Remote control mode. This affects the closing command the permission to set/remove work tag.

4 ACR Tripped (open) Y ACR Tripped ACR not Tripped 5 ACR Closed Y ACR Closed ACR not Closed

These are repeats of the mechanism travel switches. When the ACR is disconnected from the control cubicle they are both cleared.

6 Phase Ai Live Y 7 Phase Bi Live N 8 Phase Ci Live N 9 Phase Ax Live

Note 1 Y

10 Phase Bx Live Note 1

N

11 Phase Cx Live Note 1

N

Phase is live Phase is dead Shows if the phase bushings are above or below the live line threshold. Phase designation is determined by user.

12 Source Voltage Status Y All of the source side Terminals dead

13 Load Voltage Status Y

Shows that any of the three phases of the designated Source side or Load side are live.

All of the load side Terminal dead

Note that these points are different to the Load/Source Live/Dead events in the controller event record

14 Load Current On Note 1

Y Current of 2.5A or more is flowing in at least one phase

Current of less than 2.5A is flowing in all three phases

15 Reserved 16 Power Flow Direction Y Source X, Load I Source I, Load X 17 Reserved 18 Reserved 19 Reserved 20 Locked Y ACR Locked. ACR not locked. Shows that the ACR is

mechanically locked in position. Not supported on the N-Series where it will always be zero.

21 ACR Memory Data Invalid

Y ACR Memory Data not valid

ACR Memory Data Valid

Shows that the controller has retrieved the data from the ACR memory. When invalid the switchgear attributes and the gas pressure are zeroed,


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Bit Name

W S

erie

s


22 Switchgear Connection Y Switch disconnected from control cubicle.

Switch connected from control cubicle.

Shows the connection state of the cable between the switchgear and the controller. When connected to the ACR Trip, Close and Locked indications are valid.When disconnected from the ACR data will be forced invalid

23 Contacts Life Low Y When any vacuum interrupter contact life is less than 20%.

When all vacuum interrupters have contact life >= 20%

24 SF6 Gas Pressure Low or Invalid

N Gas pressure Low or Invalid

Gas Pressure Normal, or Not Known, or Not a switchgear which has SF6.

Only set when switchgear is connected and ACR memory data is valid and switchgear type has SF6.

25 Close Isolate Y Close Isolate Switch OFF/ISOLATE(i.e. Close is disabled)

Close Isolate Switch ON/ENABLE (i.e. Close is enabled)

26 Trip Isolate Y Trip Isolate Switch OFF (i.e. Trip is disabled)

Trip Isolate Switch ON(i.e. Trip is enabled)

Shows the state of the Trip and Close isolate switches on the control panel

27 Work Tag Y Work Tag Applied Work Tag Removed The controller can have a work tag. This affects the closing command

28 Battery Supply Y Battery supply not normal. This includes :- Battery Off Battery Overvolt Battery Low Volts

Battery supply normal

29 Capacitor Charge Failure Y Capacitor Charge Failed

Capacitor Charge OK The Trip/Close Capacitors have failed to charge

30 Mechanism Failure Y Mechanism Failure Mechanism OK The switchgear has failed to Trip or Close electrically

31 Dummy Circuit Breaker Closed

Y DCB Closed DCB Not Closed The dummy circuit breaker is an internal point useful for SCADA system testing. The value of the DCB is non-volatile.

32 Reserved 33 Supply Outage

Measurement Y Supply Outage

Measurement is ON. Supply Outage Measurement is OFF.

34 Door Open Y Door Open. Door Closed. Status of cubicle door. Only valid if hardware option installed.

35 Switch Function Y Function is ACR Function is LBS


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Bit Name

W S

erie

s


36 Auxiliary Supply Fail Delayed

Y Auxiliary supply has failed for more than 120sec.

Auxiliary supply restored for more than 20sec.

Status of controller auxiliary supply (delayed).

37 Reserved 38 Reserved 39 Reserved

Note 1. Not available with standard U series ACR without external CVTs, always 0

ACR Protection Group Flags

Bit Name

W S

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40 Prot A Active Y Protection Group A is active

Protection Group A is not active

Only one protection group is active at any one time.

41 Prot B Active Y Protection Group B is active

Protection Group B is not active

42 Prot C Active Y Protection Group C is active

Protection Group C is not active

43 Prot D Active Y Protection Group D is active

Protection Group D is not active

44 Prot E Active Y Protection Group E is active

Protection Group E is not active

45 Prot F Active Y Protection Group F is active

Protection Group F is not active

46 Prot G Active Y Protection Group G is active

Protection Group G is not active

47 Prot H Active Y Protection Group H is active

Protection Group H is not active

48 Prot I Active Y Protection Group I is active

Protection Group I is not active

49 Prot J Active Y Protection Group J is active

Protection Group J is not active

ACR Automation Flags

Bit Name

W S

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50 ACO Auto Restore

Y ACO Auto Restore is ON.

ACO Auto Restore is OFF.

51 ACO Enable Y Auto-Changeover is ON.

Auto-Changeover is OFF.


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52 ACO Mode Y Auto-Changeover is set to Break before Make.

Auto-Changeover is set to Make before Break.

The logic required for an ACO operation.

53 ACO Rank Y Auto-Changeover is set to Master.

Auto-Changeover is set to Slave operation.

The ACO hierachy setting for the Controller.

54 Generator Control

Y Generator Control is ON.

Generator Control is OFF.

Generator Control Enable.

55 Reserved ACR Protection Operation Flags This group of points indicates what happened in the last protection sequence. For example the recloser may have tripped, closed, tripped again and locked out. Or it may have tripped, closed and stayed closed because the fault was cleared. In both cases the flags below are set to show the causes of the trips and whether the lockout state has been reached or not. A set of flags is available for each trip in a protection sequence. In addition analogue data is available which shows the fault currents which occurred during the sequence and the number of trips which took place (refer Appendix C.2) Note that a sequence starts when there is a protection trip or a sequence advance. Most of these flags are cleared either by protocol command or when the switchgear is tripped/closed by the operator or when a new protection sequence starts. This data is volatile i.e. it is zeroed on controller software reset.

Bit Name

W S

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56 Sequence in Progress

Y

Start of sequence ie a protection trip of a sequence advance has occurred

End of sequence. Either lockout or reclaim.

This shows that a protection sequence has started and not yet completed. Note that operator trip does not cause a “sequence in progress. Event time is the time of the trip or sequence advance.

57 Protection Data Valid

Y End of sequence either lockout or reclaim

All fault flags are cleared by one of the following actions :- • “Reset Fault Flags

and Currents” protocol control command

• Any Operator Close action

• Controller software reset

• Start of a new sequence

This shows that the protection sequence is over and the other flags are set. This could be used to drive an operator alarm at the SCADA system to alert him to the fact that a protection sequence has occurred. Note that operator trip alone does not cause a “protection data valid” Event time is the time of lockout or reclaim.


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Bit Name

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58 Single Shot Protection

Y Single Shot Protection was active at the time of the trip.

One flag only provided because a single shot trip forces lockout. Event time is the time of the pickup.

59 Loss Of Phase Trip Y Trip was caused by Loss of Phase Protection

sequence

One flag only provided because LOP protection forces lockout. Event time is the time of the trip.

60 Loss Of Phase - Phase A Lost

Y Phase A was lost at time of Loss of Phase Trip

Set if A Phase is lost at time of Loss of Phase trip

61 Loss Of Phase - Phase B Lost

N Phase B was lost at time of Loss of Phase Trip

Set if B Phase is lost at time of Loss of Phase trip

62 Loss Of Phase -Phase C Lost

N Phase C was lost at time of Loss of Phase Trip

Set if C Phase is lost at time of Loss of Phase trip

63 High Current Lockout

Y The high current lockout function forced the controller to lockout during the last protection sequence

One flag only because High Current Lockout forces lockout Time stamp as for flags above. Event time is the time of the lockout event.

64 Lockout Y The controller is in lockout

Cleared by any close action

This flag shows that the controller is in lockout. Therefore no auto-reclosing will take place. If the ACR is closed this flag will clear. Therefore when this flag is clear and the ACR is closed it indicates that the protection sequence cleared the fault.

65 Operator Trip Y The last trip was caused

by a local or remote operator


One flag only because operator trip forces lockout.

66 Last Trip Phase Overcurrent

Y The most recent protection operation was caused by a Phase Overcurrent Protection Trip

67 Last Trip Earth/Ground Overcurrent

Y The most recent protection operation was caused by an Earth/Ground Overcurrent Protection Trip

Protection Flags are cleared by one of the following actions:- • “Reset Fault Flags

and Currents” protocol command

• Operator Close • At the time of the

next trip – the flags are ‘refreshed’ at this time old flags


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Bit Name

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68 Last Trip SEF/SGF Overcurrent

Y The most recent protection operation was caused by an SEF/SGF Overcurrent Protection Trip

this time – old flags are cleared and the cause of the ‘most recent’ protection operation set.

• Protection turned OFF

69 Operator Close Y Most recent close caused by local or remote panel close request.

Indicates the most recent close was caused by a local or remote panel close request.

70 IOEX Close Y Most recent close caused by an IOEX close input.

Indicates the most recent close was caused by an IOEX close input.

71 Protocol Close Y Most recent close caused by a protocol close request.

Cleared by one of the following actions:

• 'Reset Flags and Currents' protocol command.

• Controller Software Reset (data is volatile).

• At the time of the next Close.

• Start of a new sequence.

Indicates the most recent close was caused by a protocol close request.

72 Automation Close Y Most recent close caused by a Distributed Automation Close request.

Cleared by one of the following actions




Indicates the most recent close was caused by a Distributed Automation Close request (ie Loop Automation, Auto Changeover, or Generator Control).

73 Normal Frequency Close

Y Most recent close caused by Normal Frequency Close request.





Indiciates the most recent close was caused by a Normal Frequency Close request


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Bit Name

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74 External Close Y Set if any of the following caused the most recent close:

• CCEM external button on N-Series.

• Mechanical action. The switchgear detected as closed without a close reques.

• Electrical action (only available on the Advanced controller).





The most recent close caused by an action external to the Controller.

75 Under Frequency Protection Flag

Protection operation was caused by Under Frequency

76 Over Frequency Protection Flag

Protection operation was caused by Over Frequency




next trip – the flags are ‘refreshed’ at this time – old flags are cleared and the cause of the ‘most recent’ protection operation set.


77 Last Trip External Y Last Trip caused by either a FTI or an IOEX Protection Input.

Protection Flags are cleared by one of the following actions:-

• "Reset Fault Flags and Currents" protocol command.

• Operator Close. • At the time of the

next trip the flags are 'refreshed' at this time old flags are cleared and the cause of the 'most recent' protection operation set.

• Protection turned OFF.



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Bit Name

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78 Last Trip Phase Overcurrent (Close Reset)

Y The last trip was caused by a Phase Overcurrent Fault.

This flags whether the last trip was caused by a Phase Overcurrent Fault.

79 Last Trip Earth/Ground Overcurrent (Close Reset)

N The last trip was caused by an Earth/Ground Overcurrent Fault.

This flags whether the last trip was caused by an Earth/Ground Overcurrent Fault.

80 Last Trip SEF/SGF Overcurrent (Close Reset)

N The last trip was caused by an SEF/SGF Overcurrent Fault.

These flags are cleared by one of the following actions:

• "Reset Fault Flags and Currents" protocol control command.

• Any Close action. • Controller software

reset (data is volatile).

This flags whether the last trip was caused by an SEF/SGF Overcurrent Fault.

81 Most Recent Trip Phase A Overcurrent

Y The most recent trip was caused by a A Phase Overcurrent Protection Trip

82 Most Recent Trip Phase B Overcurrent

N The most recent trip was caused by a B Phase Overcurrent Protection Trip

83 Most Recent Trip Phase C Overcurrent

N The most recent trip was caused by a C Phase Overcurrent Protection Trip

84 Instantaneous Most Recent Trip

Y The peak current for the most recent trip was greater than the instantaneous setting.




next trip – the flags are ‘refreshed’ at this time – old flags are cleared and the cause of the ‘most recent’ protection operation set.


85 Source Dead Y Set if a lockout caused by the ‘Dead Lockout’ Feature occurred.

Cleared by: • protocol command • any operator close

or operator trip. This includes remote control commands.

• start of a new sequence. The time stamp reflects this.

86 Work Tag Trip Y Trip while Work Tag or Hot Line Tag applied.

Cleared by: • Operator Close • At the time of the

next trip the flags are ‘refreshed’, at this time old flags are cleared and the cause of the ‘most recent’ protection operation set.



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87 Live Load Block Occurred

Y Set if the most recent close request was blocked due to a Live Load condition.




• Protection OFF. • At the time of the

next Close. ACR Operator/Protection Flags

Bit Name

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88 Earth / Ground Protection Enabled

N Earth / Ground Protection ON

Earth / Ground Protection OFF

89 SEF/SGF Protection Enabled

N SEF/SGF protection ON

SEF/SGF protection OFF

90 Auto Reclose Y Auto Reclose ON Auto Reclose OFF 91 Loss of Phase

Alarm Setting Y Loss of Phase

Protection, if ON, is set to alarm only (ie. no Trip will occur).

Loss of Phase Protection, if ON, is set to normal operation (ie. will Trip).

92 Cold Load Idle Y Cold Load is Idle or is turned off. This means that the threshold multiplier is not being affected by the cold load function.

Cold load is NOT Idle. This means that the threshold multiplier is being raised by the cold load pickup function in order to pick up cold load.

93 High Current Lockout

Y High current lockout ON

High current lockout OFF

94 Loss of Phase Protection

N Loss of Phase Protection ON

Loss of Phase Protection OFF

95 Sequence Control

Y Sequence Control ON

Sequence Control OFF

96 Live Load blocking

Y Live Load blocking ON Live Load blocking OFF

97 Protection enable

Y Protection Enabled Protection turned OFF

98 Automatic Protection Group Selection

Y Automatic Protection Group Selection ON

Automatic Protection Group Selection OFF


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Bit Name

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99 Normal Frequency Close Note 1

Y The Under/Over Frequency protection has “Normal Frequency Close” ON

The Under/Over Frequency protection has “Normal Frequency Close” OFF

100 Dead Lockout Y Dead Lockout Setting is ON

Dead Lockout Setting is OFF

101 LOP / Loop N LOP / Loop Linked LOP / Loop Unlinked 102 Under

Frequency Trip Note 1

Y The Under/Over Frequency protection “Under Frequency Trip” is enabled.

The Under/Over Frequency protection “Under Frequency Trip” is disabled.

103 Over Frequency Trip Note 1

Y The Under/Over Frequency protection “Over Frequency Trip” is enabled.

The Under/Over Frequency protection “Over Frequency Trip” is disabled.

Note 1 Under/Over Frequency Protection unavailable on CAPM-4 ACR Accumulated Protection Trip Operation Flags Multiple Flags can be set in this section because they accumulate all the trips in the sequence

Bit Name

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104 Phase Over Current Trip

Y One or more trips were caused by Phase Overcurrent Protection



105 Earth / Ground Over Current Trip

N One or more trips were caused by Earth / Ground Overcurrent Protection


106 SEF/SGF Over Current Trip

N One or more trips were caused by Sensitive Earth / Ground Fault Protection

• Controller software reset (data is volatile)

107 Sequence Advance

Y One or more sequence advances occurred.


ACR Protection Pickup Flags


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Bit

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108 A Phase Pickup Y A phase A pickup has been detected

The pick up condition has reset

109 B Phase Pickup N A phase B pickup has been detected


110 C Phase Pickup N A phase C pickup has been detected


111 Earth/Ground Pickup

N An earth/ground pickup has been detected


112 SEF/SGF Pickup

N A SEF/SGF pickup has been detected


113 Under Frequency Pickup

N An under frequency pickup has been detected


114 Over Frequency Pickup

N An over frequency pickup has been detected


115 Accumulated Phase Overcurrent Trip

Y One or more trips were caused by Phase Overcurrent protection.

This flags whether a Phase Overcurrent Trip occured. This flag can be set at the same time as other accumulated flags.

116 Accumulated Earth/Ground Overcurrent Trip.

N One or more trips were caused by Earth/Ground Overcurrent protection.

This flags whether an Earth/Ground Overcurrent Trip occured. This flag can be set at the same time as other accumulated flags.

117 Accumulated SEF/SGF Overcurrent Trip

N One or more trips were caused by Sensitive Earth/Ground fault protection.

This flags whether an SEF/SGF Overcurrent Trip occurred. This flag can be set at the same time as other accumulated flags.

118 Accumulated Sequence Advance

Y One or more sequence advances occurred.

All fault flags are cleared by one of the following actions: • "Reset Fault Flags and

Currents" protocol control command.

• Any operator close action.

• Controller software reset (data is volatile).


This flags whether a Sequence Advance ocurred. This flag can be set at the same time as other accumulated flags.

119 NPS Alarm N A NPS fault has been picked up. If NPS protection is on, a trip will have occurred.

The fault flag is cleared by one of the following actions:


• The NPS current level falls below the pickup value.


This flags that a NPS fault has been picked up.


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120 Accumulated NPS Overcurrent Trip.

N One or more trips were caused by NPS Overcurrent protection.

All fault flags are cleared by one of the following actions: • "Reset Fault Flags and

Currents" protocol control command.

• Any operator close action.



This flags whether an NPS Overcurrent Trip occured. This flag can be set at the same time as other accumulated flags.

121 LOP Alarm N A LOP condition has been detected. If LOP protection was on, a trip would have occurred.

The flag is cleared by one of the following actions: • The LOP condition is

removed. • Controller software


This flags that a LOP condition has been detected but LOP tripping is Off.

ACR NPS Flags

Bit

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122 Protection Flag – NPS Overcurrent

N The most recent protection operation was caused by an NPS Overcurrent Protection Trip.

Protection Flags are cleared by one of the following actions:-

• "Reset Fault Flags and Currents" protocol command.

• Operator Close. • At the time of the next

protection trip the flags are 'refreshed'. Old flags are cleared and the cause of the 'most recent' protection operation set.


Indicates if the most recent protection operation was caused by an NPS Overcurrent Protection Trip.


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123 Last Trip NPS N The Last Trip was caused by a NPS overcurrent fault.

Last Trip Flags are cleared by one of the following actions:- • "Reset Fault Flags and

Currents" protocol command.

• Operator Close. • Protection turned OFF. • Start of a new

sequence. • At the time of the next

trip the flags are 'refreshed'. Old flags are cleared and the cause of the 'most recent' trip set.

• Controller reset

124 NPS Overcurrent Trip 1

N NPS Overcurrent Protection Trip 1







Protection Flags are cleared by one of the following actions:- • "Reset Fault Flags and

Currents" protocol command.

• Operator Close. • Protection turned OFF. • Start of a new

sequence. • Controller reset.

128 Last Trip NPS Overcurrent (Close Reset)

N The last trip was caused by an NPS Overcurrent Fault.

These flags are cleared by one of the following actions:


• Any Close action. • Protection turned OFF. • Controller software



ACR Loop Automation Flags These flags are only valid when the Loop Automation option is enabled for the current CAPM configuration. They are otherwise always reported as OFF.


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Bit Name

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132 Loop Auto On N Loop Automation is On Loop Automation is Off 133 Auto Restore

On N Auto Restore is On Auto Restore is Off

134 Loop Auto Tie Restore On

N The Tie recloser is configured to restore supply in both directions

The Tie Recloser will only restore supply to its Load side or the Recloser type is not set to Tie

135 Loop Auto Type Feeder

N Recloser type is set to Feeder Recloser type is not set to Feeder

136 Loop Auto Type Midpoint

N Recloser type is set to Midpoint

Recloser type is not set to Midpoint

137 Loop Auto Type Tie

N Recloser type is set to Tie Recloser type is not set to Tie

138 Loop Auto Trip Pending

N Loop automation has issued a Trip Request

A loop automation trip is not pending

139 Loop Auto Close Pending

N Loop automation has issued a Close Request

A loop automation close is not pending

140 Loop Auto Trip Request

N Set when Loop Automation issues a Trip Request.

Normal state, cleared on next internal scan after set

141 Loop Auto Close Request

N Set when Loop Automation issues a Close Request.

Normal state, cleared on next internal scan after set

142 Reserved 143 Reserved

ACR Input Status

Bit Name

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Protection Trip 1 144 Phase Over Current

Trip Y Trip was caused by

Phase Overcurrent Protection




N Trip was caused by Earth / Ground Overcurrent Protection

Any Operator Close action


N Trip was caused by Sensitive Earth / Ground Fault Protection

Controller software reset

147 Sequence Advance Y Sequence advance occurred. Start of a new sequence

148 Phase A Overcurrent Trip

Y Phase A Overcurrent Protection Trip

149 Phase B Overcurrent Trip

N Phase B Overcurrent Protection Trip

150 Phase C Overcurrent Trip

N Phase C Overcurrent Protection Trip

Cleared by: • protocol command • any operator close or

operator trip. This includes remote control commands.


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Bit Name

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151 Instantaneous Trip Flag

N

Peak Fault Current for trip was above the instantaneous multiplier setting.

control commands. • start of a new

sequence. The time stamp reflects this.

Set at the instant of the most recent trip peak current event if the peak current for the trip was greater than the instantaneous setting. Four of these flags are provided: one for each trip in the sequence.


Trip Y Trip was caused by

Phase Overcurrent Protection





Any Operator Close action



Controller software reset

155 Sequence Advance Y Sequence advance occurred.









N Peak Fault Current for trip was above the instantaneous multiplier setting.


operator trip. This includes remote control commands. • start of a new




Trip Y

Trip was caused by Phase Overcurrent Protection







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Bit Name

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163 Sequence Advance Y Sequence advance occurred.









N



operator trip. This includes remote control commands. • start of a new




Trip Y

Trip was caused by Phase Overcurrent Protection

All fault flags are cleared by one of the following actions :- • “Reset Fault Flags and

Currents” protocol control command







171 Reserved 172 Phase A Overcurrent

Trip Y Phase A Overcurrent

Protection Trip 173 Phase B Overcurrent

Trip N Phase B Overcurrent

Protection Trip 174 Phase C Overcurrent

Trip N Phase C Overcurrent

Protection Trip 175 Instantaneous Trip

Flag N



operator trip. This includes remote control commands.

• start of a new sequence. The time stamp reflects this.



N00-665 R05 Page 33

ACR IOEX Inputs

Bit Name

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176 IOEX Input 1 Y Input Asserted Input Not Asserted 177 IOEX Input 2 Y Input Asserted Input Not Asserted 178 IOEX Input 3 Y Input Asserted Input Not Asserted 179 IOEX Input 4 Y Input Asserted Input Not Asserted 180 IOEX Input 5 Y Input Asserted Input Not Asserted 181 IOEX Input 6 Y Input Asserted Input Not Asserted 182 IOEX Input 7 Y Input Asserted Input Not Asserted 183 IOEX Input 8 Y Input Asserted Input Not Asserted 184 IOEX Input 9 Y Input Asserted Input Not Asserted 185 IOEX Input 10 Y Input Asserted Input Not Asserted 186 IOEX Input 11 Y Input Asserted Input Not Asserted 187 IOEX Input 12 Y Input Asserted Input Not Asserted

Returned State changes after 30ms debounce.


N00-665 R05 Page 34

Appendix C.2 ACR Modbus - Analogue Inputs These are the analogue input status points that are available. They are stored in holding registers in the CAPM. Each holding register is 16 bits wide. The phase designation A, B, C is determined by the user, refer to the equipment manual for more information. Phase terminology is explained in section 2.3. W series: support is indicated in tables below by a ‘Y’. If indicated as ‘N’ then value is always 0. Scaling Modbus analogue values are transmitted as a 16 bit value with an additional sign bit. Where the CAPM range of analogue values exceeds the range of a 16 bit number (-32768 to 32767) the values are scaled. All analogue values are scaled with 1 count = 1 Resolution/Units. In other words, 1 transmitted count = raw value ÷ resolution. For example: a phase voltage of 1000V will be transmitted as a count of 250 (=1000 ÷ 4) The transmitted value must therefore be re-scaled at the master station before being displayed to the SCADA operator, logged, etc. Modbus Implementation Request Code(s): 03 (Read Holding Registers) Reply Codes(s): 03 (Read Holding Registers) Error Code: 0x83 Exception Code: 01 (Illegal Function), 02 (Illegal Data Address), 03 (Illegal Data Value), 04 (Slave Device Failure) ACR Line Currents Note that these relate to user-designated phases rather than the physical bushings.

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0 A-Phase Current Y 0 16000 1 A 1 B-Phase Current N 0 16000 1 A 2 C-Phase Current N 0 16000 1 A 3 (Earth / Ground) Current Note 1 N 0 16000 1 A

Note 1) Not available for a standard U-series ACR without external CVTs. Value is always zero. ACR Voltage Measurements Voltages are provided either for all 6 Terminals or for only 3 Terminals depending upon the model of ACR.

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4 Ai Phase-(Earth / Ground) Voltage Y 0 40000 2 V 5 Bi Phase-(Earth / Ground) Voltage N 0 40000 2 V 6 Ci Phase-(Earth / Ground) Voltage N 0 40000 2 V 7 Ax Phase-(Earth / Ground) Volts

Note 1 Y 0 40000 2 V

8 Bx Phase-(Earth / Ground) Volts Note 1

N 0 40000 2 V

9 Cx Phase-(Earth / Ground) Volts Note 1

N 0 40000 2 V

10 A-Bi Phase-Phase Voltage N 0 40000 2 V 11 B-Ci Phase-Phase Voltage N 0 40000 2 V


N00-665 R05 Page 35

12 C-Ai Phase-Phase Voltage N 0 40000 2 V 13 A-Bx Phase-Phase Volts Note 1 N 0 40000 2 V 14 B-Cx Phase-Phase Volts Note 1 N 0 40000 2 V 15 C-Ax Phase-Phase Volts Note 1 N 0 40000 2 V 16 Frequency Note 2 Y 45 65 0.1Hz

Note 1. Not available in standard U-series ACR without external CVTs. Value always zero. 2. Only available on CAPM5/6. Return 0 if unavailable. ACR System Power

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17 System kW This can be a signed quantity that indicates direction of power flow, or an unsigned quantity that is always positive regardless of the direction of the power flow. This is determined by the controller configuration

Y -131 MW 131MW 4 kW

18 System Apparent Power Y 0 131MVA 4 kVA 19 System Reactive Power

Unsigned quantity which is always positive irrespective of direction of power flow

Y 0 131MVAR 4 kVAR

20 System Power Factor Note 1

This is calculated from Real and Apparent power. Y 0.00 1.00 0.01

Note 1. All data is transmitted as integers. Power factor has an extra built in scale factor of 100 ie. range 0.00 to 1.00 with

resolution 0.01 is transmitted as 0 to 100 with resolution 1. ACR SF6 Pressure If the ACR Memory Data is not valid then the pressure is zeroed. Gas Pressure is not supported on U-Series ACR, value will be zero.

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21 Gas Pressure, kPag. N -100 300 1 kPaG 22 Gas Pressure, PSI N -14 44 0.1 PSI

ACR Switchgear and Controller Details

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23 Reserved N 24 I Contact Life Note 1 Y 0.0 100.0 0.01 %


N00-665 R05 Page 36

25 II Contact Life Note 1 N 0.0 100.0 0.01 % 26 III Contact Life Note 1 N 0.0 100.0 0.01 % 27 Operations Counter Note 2 Y 0 32768 1 Operation 28 Phase Designation

0 = A-B-C 1 = A-C-B 2 = B-A-C 3 = B-C-A 4 = C-A-B 5 = C-B-A The order A-B-C indicates the mapping between phases (A, B, C) and bushing (I-II-III). For example designation 2 maps B phase to I, A phase to II and C phase to III. The phase designation is set up on the controller so that the data in the database matches the HV terminal wiring.

N 0 5 1

Note 1. All data is transmitted as integers. Contact life has an extra built in scale factor of 100 ie range of 0.0% to 100.0%

with resolution 0.01% is transmitted as 0 to 10000 with resolution 1. 2. These values are zeroed when ACR Memory Valid is not valid. ACR Cumulative Protection Sequence Data These points show all sources that record a max current event in the event log during a protection sequence. If the same source has more than one max current event then the value in the point will be the max current from the last trip of the sequence. All fault currents are cleared to zero by one of the following actions:-

• “Reset Fault Flags and Currents” protocol control command • Any Operator Close action • Controller reset (data is volatile) • Start of a new sequence

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29 A Fault Current – Written on an A-Max event. Y 0 16000 1A 30 B Fault Current – Written on a B-Max event. N 0 16000 1A 31 C Fault Current – Written on a C-Max event. N 0 16000 1A 32 Earth / Ground Fault Current - Written on a G-

Max event. This includes SEF/SGF Fault currents. N 0 16000 1A

33 During a protection sequence the value increments indicating the current trip or sequence advance. After a protection sequence the final trip or sequence advance that occurred.

Y 1 4 1

34 Protection Group that is in service. 0 = Group A 1 = Group B … 9 = Group J

Y 0 9 1


N00-665 R05 Page 37

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35 NPS Protection State 0 = NPS Protection OFF 1 = NPS Protection ON 2 = NPS Protection Alarm Only

N 0 2 1

ACR Protection State

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36 The number of the Protection Group which was active at the start of the sequence 0 = Group A 1 = Group B … 9 = Group J

Y 0 9 1

ACR Trip Counters These counters are cleared by the ‘reset flags’ command and by turning protection On or OFF. These counters do not increment when switchgear is an LBS. When the counters reach there max value, they do not roll-over, instead they ‘stick’ at this max value.

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37 A Phase O/C Trip Counter Y 0 99 1 38 B Phase O/C Trip Counter N 0 99 1 39 C Phase O/C Trip Counter N 0 99 1 40 Earth O/C Trip Counter N 0 99 1 41 SEF O/C Trip Counter N 0 99 1 42 LOP Trip Counter N 0 99 1 43 FRQ Trip Counter Y 0 99 1

ACR Pickup Counters

These counters are cleared by the ‘reset flags’ command and by turning protection On or OFF. When the counters reach there max value, they do not roll-over, instead they ‘stick’ at this max value.

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44 A Phase O/C Pickup Counter Y 0 99 1 45 B Phase O/C Pickup Counter N 0 99 1


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46 C Phase O/C Pickup Counter N 0 99 1 47 Earth O/C Pickup Counter N 0 99 1 48 SEF O/C Pickup Counter N 0 99 1 49 LOP Indication Counter N 0 99 1 50 FRQ Pickup Counter Y 0 99 1 51 Phase Overcurrent Pickup Counter N 0 99 1

ACR Loop Automation This value is only valid when the Loop Automation option is enabled for the current CAPM configuration. It is otherwise always reported as zero.

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52 Loop automation time remaining prior to a trip or close action occurring. For no action pending value is zero.

N 0 1800 1 second

ACR Protection Sequence Data These analogue points record data about the protection sequence including maximum fault currents. These are derived from the max current events that are seen in the Operator Control Panel event record and record the current for each phase and for earth/ground. For any one protection trip or sequence advance more than one fault current can be set. For example a Phase/Phase fault might set an A-Phase current and a B-Phase current. Other data recorded includes the number of trips in the protection sequence and the Protection Group that was active at the time of the protection operation. Data is cleared to zero by the following actions:- • “Reset Fault Current” remote control command defined below • Any Operator Close or Trip action • Start of a new sequence. This data is volatile, ie they are zeroed on controller software reset.

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Protection Trip 1

53 A Fault Current – Written on an A-Max event. Y 0 16000 1 A 54 B Fault Current – Written on a B-Max event. N 0 16000 1 A 55 C Fault Current – Written on a C-Max event. N 0 16000 1 A 56 Earth / Ground Fault Current - Written on a G-Max

event. This includes SEF/SGF Fault currents. N 0 16000 1 A

Protection Trip 2



Protection Trip 3

61 A Fault Current – Written on an A-Max event. Y 0 16000 1 A


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62 B Fault Current – Written on a B-Max event. N 0 16000 1 A 63 C Fault Current – Written on a C-Max event. N 0 16000 1 A 64 Earth / Ground Fault Current - Written on a G-Max


Protection Trip 4



ACR Accumulator Data These points use two holding registers. They are signed 32 bit numbers (-2147483648 to 2147483647). The first register contains the least significant bits.

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70 KWH Cumulative Note 1 Y 0 2147483647 1 KWH 72 Source Outages Note 2 Y 0 2147483647 1 Count 74 Source Outage Duration Note 2 Y 0 2147483647 1 Seconds 76 Load Outages Note 2 Y 0 2147483647 1 Count 78 Load Outage Duration Note 2 Y 0 2147483647 1 Second 80 Reserved 82 KWH Cumulative Forward Note 3 Y 0 2147483647 1 KWH 84 KWH Cumulative Reverse Note 3 Y 0 2147483647 1 KWH

Note: 1. This accumulates the total kWH flowing through the ACR.

If the controller is set for Power Flow Unidirectional then the cumulative total increases irrespective of the direction of power flow to show the total power that has passed through the device. If the controller is set to Bi-Directional power flow then the cumulative total can increase or decrease reflecting the nett power flow.

2. The power flow direction (source/load designation) is determined by the user. Refer to Power Flow Direction Binary Input for status and Binary Output for control.

3. Use relevant Digital Control (55 or 56) to collect data. ACR Protection Data

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86 NPS Fault Trip 1 N 0 16000 1A 87 NPS Fault Trip 2 N 0 16000 1A 88 NPS Fault Trip 3 N 0 16000 1A 89 NPS Fault Trip 4 N 0 16000 1A 90 Most Recent Trip NPS Fault N 0 16000 1A


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91 Maximum Phase A Fault Current Y 0 16000 1A 92 Maximum Phase B Fault Current N 0 16000 1A 93 Maximum Phase C Fault Current N 0 16000 1A 94 Maximum Earth/Ground Fault Current N 0 16000 1A 95 Maximum NPS Fault Current N 0 16000 1A 96 Reserved 97 NPS Current N 0 16000 1A 98 A-Phase Load Current Prior to Last Pickup Note 1 Y 0 16000 1A 99 B-Phase Load Current Prior to Last Pickup Note 1 N 0 16000 1A 100 C-Phase Load Current Prior to Last Pickup Note 1 N 0 16000 1A

ACR Automation

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101 Auto Changeover Status

0 - Auto-Changeover OFF.

1 - Auto-Changeover ON.

2 - ACO load MASTER.

3 - ACO load SLAVE.

4 - ACO No SLAVE comms.

5 - ACO abort - status 1.














N 0 18 1


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102 Generator Control Status

0 - GenCtrl OFF.

1 - Switch Closed.

2 - Line Dead Check.

3 - Wait Switch Open.

4 - Wait Generator Live.

5 - Generator Running.

6 - Line Live Check.

7 - Wait Generator OFF.

8 - Wait Switch Closed.

Y 0 8 1

ACR Daily Data

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103 Reserved 104 Time of Maximum Average Current.

This is the end time of the maximum average demand current of all relevant phases for the previous full day ending at midnight. The time is in minutes since midnight.

Y 1 1440 1 Min

105 Maximum Average Demand Current.

This is the maximum average demand current of all relevant phases for the previous full day ending at midnight.

Y 0 16000 1A

106 Average Sampling Period. This was the average sampling period at the end of the previous day (either the Average Demand or Configured History period).

Y 1 1440 1 Min

Note: 1. Average taken over Demand or Configured History period.


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Appendix C.3 ACR Modbus - Digital Control Coil control is only supported when the controller is in Remote mode. If the controller is in Local or Do Not Operate mode then the response is 07 (NAK). Both the "force coil ON" and "force coil OFF" are valid. Modbus Implementation Request Code(s): 05 (Force Single Coil) Reply Codes(s): 05 (Force Single Coil) Error Code: 0x85 Exception Code: 01 (Illegal Function), 02 (Illegal Data Address), 03 (Illegal Data Value), 04 (Slave Device Failure)

Coil Name W

Ser

ies

On = ‘1’ Off = ‘0’ Comment

0 Work Tag N Applies Work Tag Rejected if: • CAPM is in LOCAL

Mode

Removes Work Tag

Rejected if: • CAPM is in

LOCAL Mode

1 Earth / Ground Fault protection

N Enable Earth / Ground Protection Rejected if: • earth/ground fault

OFF is not allowed.

Earth / Ground Protection OFF and SEF/SGF Protection OFF Rejected if: • earth/ground fault

OFF is not allowed.

2 SEF/SGF protection N SEF/SGF protection ON and Earth / Ground Protection ON Rejected if: • SEF/SGF is not

available

Disable SEF/SGF protection

3 Auto Reclose Y Auto Reclose ON Auto Reclose OFF 4 ACR/LBS Control

Y Close

Rejected if: • Close coil is isolated • CAPM is in LOCAL

control mode • SF6 gas pressure is

low (if applicable) AND low gas lockout is ON

• Work Tag is applied • Switchgear data

invalid • Mechanically

interlocked (if applicable)

• Live load blocking ON AND any load side terminal live

• Trip and/or Close

Trip Rejected if: • Trip coil is isolated • Switchgear data

invalid • ACR AND SF6

gas pressure is low (if applicable) AND low gas lockout is ON

• LBS AND SF6 gas pressure is low (if applicable)

• LBS AND Mechanically interlocked

•


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capacitors are charging or failed

5 Reset Fault Flags and Currents Note 2

Y Resets all Analog Fault Currents to zero and clears all binary protection trip flags

No Action

6 Protection Control

Y Enable Protection Turn ALL Protection OFF Rejected if: • protection OFF is

not allowed

7 Power Flow Direction Note 1

Y Source X, Load I Source I, Load X

8 Reset Controller Y Forces a controller software reset

9 Reserved 10 Reserved 11 Cold Load Idle/Max Y Set cold load time to its

maximum value. This means that the cold load threshold current will be set to its maximum value Rejected if: • Cold load support is

OFF

Set cold load time to zero. This means that the threshold multiplier will not be affected by the cold load function. Rejected if: • Cold load support

is OFF

12 High Current Lockout Y Enable High Current Lockout

Disable High Current Lockout

13 Loss of Phase Protection

N Enable Loss of Phase Protection

Disable Loss of Phase Protection

14 Sequence Control

Y Enable Sequence Control Disable Sequence Control

15 Live Load Blocking Y Live Load blocking ON Live Load blocking OFF

16 Freeze/ Reset

KWH Cumulative Accumulator freeze/reset operation.

Freezes the KWH Cumulative accumulator value ready for transmission and resets the running count back to zero

17 DCB Control Y Close Trip Operate the Dummy Circuit Breaker

18 APGS / ADGS Control (Code Version 023-03.00 and later)

Automatic Protection Group Selection ON Rejected if: • APGS ON is Not

Allowed • Loop Automation ON

Automatic Protection Group Selection OFF

Controls Automatic Protection Group Selection


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19 Loop Automation Control

Loop Automation ON Rejected if: • Loop automation

capability not available

• Trip coil isolated • Close coil isolated • Mechanism fail • Switchgear data

invalid • Battery not normal • SF6 Gas Pressure is

low (if applicable) AND Low Gas Lockout is ON

• Tripped AND (Midpoint OR Feeder)

• U Series AND no external CVTs AND (TIE OR Auto Restore ON)

Loop Automation OFF Rejected if: • Loop automation

capability not available

Controls Loop Automation.

20 Supply Outages Control

Supply Outage Measurement ON

Supply Outage Measurement OFF

Controls Supply Outage MeasurementRefer note 3

21 Supply Outages Reset Resets all Supply Outage accumulator values for the controller, this is not protocol specific

Supply Outage Accumulator reset. Refer note 3

22 Normal Frequency Close

Turn Normal Frequency Close ON Rejected if: • Switch is LBS • CAPM 4

Turn Normal Frequency Close OFF Rejected if: • Switch is LBS • CAPM 4

Controls the state of the Normal Frequency Close facility. Refer to Note 4

23 Reserved 24 Dead Lockout Turn Dead Lockout Setting

ON Rejected if: • Switch is LBS

Turn Dead Lockout Setting OFF

Turns Dead Lockout Setting ON and OFF Note 5

25 LOP / Loop Make LOP / Loop Linked Rejected if:

• Switch is LBS

Make LOP / Loop Unlinked

Links and unlinks the LOP and Loop Auto ON setting Note 5

26 Under Frequency Trip Under Frequency Protection Tripping ON Rejected if : CAPM 4

Under Frequency Protection Tripping OFF Rejected if : CAPM 4

Enables or disables Under frequency Protection Trip

27 Over Frequency Trip Over Frequency Protection Tripping ON Rejected if: • CAPM 4

Over Frequency Protection Tripping OFF Rejected if: • CAPM 4

Enables or disables Over Frequency Protection Trip


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28 Protection Group A Y Group A ON No Action 29 Protection Group B Y Group B ON No Action 30 Protection Group C Y Group C ON No Action 31 Protection Group D Y Group D ON No Action 32 Protection Group E Y Group E ON No Action 33 Protection Group F Y Group F ON No Action 34 Protection Group G Y Group G ON No Action 35 Protection Group H Y Group H ON No Action 36 Protection Group I Y Group I ON No Action 37 Protection Group J Y Group J ON No Action

Only one group can be active at any time. Activating any of these protection groups will automatically reset the previous setting.

38 Reserved 39 Reserved 40 Reserved 41 Reserved 42 Protocol IOEX Control

1 Y

43 Protocol IOEX Control 2

Y


Y


Y


Y


Y


Y


Y

Sets an IOEX configurable point. Note: The only valid Control Type is ‘Sustained’.

Clears an IOEX configurable point. Note: The only valid Control Type is ‘Sustained’.

Sets or clears an IOEX-configurable point, for Protocol Controls.

50 ACO Auto Restore Y ACO Auto Restore ON. Rejected if:

• ACO feature is not available.

• Generator Control is available.

• Loop Automation is available.

ACO Auto Restore OFF. Rejected if:

• Generator Control is available.



Turns ACO Auto Restore ON or OFF.

51 ACO Enable Y ACO ON. Rejected if: • ACO feature is not

available. • Generator Control

available.

ACO OFF.

Enables ACO.

52 ACO Mode Y ACO Mode = Break before Make. Rejected if:


ACO Mode = Make before Break. Rejected if:


Set the ACO operation mode to Make before Break or Break before Make.


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53 Generator Control Y Turn Generator Control on. Rejected if:

• Generator Control is not available.


• Auto-changeover is available.

Turn Generator Control Off.

Generator Control enabled.

54 ACO Rank Y Set ACO Rank to be master. Rejected if:


• Switchgear is open. • ACO is enabled.

Set ACO rank to be slave. Rejected if:


• Switchgear is closed.

• ACO is enabled.

ACO Rank.

55 Freeze/Reset kWH Accum Fwd

Y Freezes the kWH Cumulative Forward accumulator value ready for transmission and resets the running count back to zero.

kWH Cumulative Forward Accumulator freeze/reset operation.

56 Freeze/Reset kWH Accum Rev

Y Freezes the kWH Cumulative Reverse accumulator value ready for transmission and resets the running count back to zero.

kWH Cumulative Reverse Accumulator freeze/reset operation.

57 Loss of Phase Alarm N Loss of Phase Alarm ON. Rejected if:

• W Series. • LOP and Loop

Auto linked. • LOP Protection

OFF.

Loss of Phase Alarm OFF. Rejected if:

• W Series. • LOP and Loop

Auto linked. • LOP Protection

OFF.

Notes. 1. Changing these settings affects the currently active protection group. The change is put into effect immediately and

is permanent for that group. In other words is equivalent to selecting that protection group on the operator control panel, changing the setting and then putting the change into service.

2. Changing the Source/Load direction affects the following aspects of the operation of the controller: • Whether the source or load corresponds to (I) or (X) on the voltage measurement displays • Which direction is positive power flow for use on the kW Signed total in System Power • Which is the source or load for Live Load Blocking • Which is the source or load for Directional Blocking • Refer section Appendix C.1, Power Flow Direction for status

3. Code Version 024-01.00 and later 4. Code Version 025-01.00 and later 5. Code Version 026-01.00 and later


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Appendix C.4 ACR Modbus - Analogue Control These are the registers able to be preset by the controller. If W series is indicated as 'Y' below then register is supported other wise no action is taken. Modbus Implementation Request Code(s): 06 (Preset Single Register) Reply Codes(s): 06 (Preset Single Register) Error Code: 0x86 Exception Code: 01 (Illegal Function), 02 (Illegal Data Address), 03 (Illegal Data Value), 04 (Slave Device Failure) Analog Controls

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0 Protection Group selection 0 = Group A 1= Group B … 9 = Group J

Y 0 9 N/A

1 NPS Protection Control 0 = NPS Protection OFF. 1 = NPS Protection ON. 2 = NPS Protection Alarm.

N 0 2 N/A


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Appendix DLBS Modbus Points Appendix D.1 LBS Modbus - Digital Inputs These points show the state of the switchgear and/or the controller. The phase designation A, B, C is determined by the user, refer to the equipment manual for more information. Phase terminology is explained in section 2.3. W series support is indicated below by a ‘Y’. If indicated as ‘N’ then value is always OFF. Modbus Implementation Request Code(s): 02 (Read Input Status) Reply Codes(s): 02 (Read Input Status) Error Code: 0x82 Exception Code: 01 (Illegal Function), 02 (Illegal Data Address), 03 (Illegal Data Value), 04 (Slave Device Failure) LBS and Controller State Flags

Bit Name Set = ‘1’ Cleared = ‘0’ Comment

0 Abnormal Operator conditions

For any of the following conditions:- • Trip or Close

Isolated, • LBS Mechanically

locked open (if applicable)

• Work Tag Applied

None of the specified conditions are true

This flag shows that the operator has the LBS in an abnormal state such as “work tag applied”. This means that it will operate differently to its normal mode of operation.

1 Maintenance Required For any of the following conditions:- • Battery not normal • Capacitor charge

failure • Low power mode • Low SF6 gas

pressure (if applicable)

• LBS data not valid (includes connection to an invalid switch type)

• Any vacuum interrupter contact life is less than 20%

• Mechanical failure\

• LBS Data invalid

No maintenance required

The controller has detected one or more conditions which require maintenance. This point cannot become Set until at least five minutes after controller start.

2 Auxiliary Supply Fail

Auxiliary supply has failed

Auxiliary supply is normal


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3 Controller Mode Local Control Enabled Remote Control Disabled

Local control Disabled Remote control Enabled

The controller is either in Local or Remote control mode. This affects the closing command the permission to set/remove work tag.

4 LBS Tripped (open) LBS Tripped LBS not Tripped 5 LBS Closed LBS Closed LBS not Closed

These are repeats of the mechanism travel switches. When the LBS is disconnected from the control cubicle they are both cleared.

6 Phase Ai Live 7 Phase Bi Live 8 Phase Ci Live 9 Phase Ax Live Note 1

10 Phase Bx Live Note 1 11 Phase Cx Live Note 1

Phase is live Phase is dead Shows if the phase bushings are above or below the live line threshold. Phase designation is determined by user.

12 Source Voltage Status All of the source side Terminals dead

13 Load Voltage Status

Shows that any of the three phases of the designated Source side or Load side are live.

All of the load side Terminal dead

Note that these points are different to the Load/Source Live/Dead events in the controller event record

14 Load Current On

Current of 2.5A or more is flowing in at least one phase

Current of less than 2.5A is flowing in all three phases

15 Reserved 16 Power Flow Direction Source X, Load I Source I, Load X 17 Reserved 18 Reserved 19 Reserved 20 Locked LBS Locked. LBS not locked. Shows that the LBS is

mechanically locked in position. Not supported on the N-Series where it will always be zero.

21 LBS Memory Data Invalid

LBS Memory Data not valid

LBS Memory Data Valid

Shows that the controller has retrieved the data from the LBS memory. When invalid the switchgear attributes and the gaspressure are zeroed,


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22 Switchgear Connection Switch disconnected from control cubicle.

Switch connected from control cubicle.

Shows the connection state of the cable between the switchgear and the controller. When connected to the LBS Trip, Close and Locked indications are valid.When disconnected from the LBS data will be forced invalid

23 Contacts Life Low When any vacuum interrupter contact life is less than 20%.

When all vacuum interrupters have contact life >= 20%

24 SF6 Gas Pressure Low or Invalid

Gas pressure Low or Invalid

Gas Pressure Normal, or Not Known, or Not a switchgear which has SF6.

Only set when switchgear is connected and LBS memory data is valid and switchgear type has SF6.

25 Close Isolate Close Isolate Switch OFF/ISOLATE(i.e. Close is disabled)

Close Isolate Switch ON/ENABLE (i.e. Close is enabled)

26 Trip Isolate Trip Isolate Switch OFF (i.e. Trip is disabled)

Trip Isolate Switch ON(i.e. Trip is enabled)

Shows the state of the Trip and Close isolate switches on the control panel

27 Work Tag Work Tag Applied Work Tag Removed The controller can have a work tag. This affects the closing command

28 Battery Supply Battery supply not normal. This includes :- Battery Off Battery Overvolt Battery Low Volts

Battery supply normal

29 Capacitor Charge Failure Capacitor Charge Failed

Capacitor Charge OK The Trip/Close Capacitors have failed to charge

30 Mechanism Failure Mechanism Failure Mechanism OK The switchgear has failed to Trip or Close electrically

31 Dummy LBS Closed Dummy LBS Closed Dummy LBS Not Closed

The dummy LBS is an internal point useful for SCADA system testing. The value of the DCB is non-volatile.


Measurement Supply Outage Measurement is ON.

Supply Outage Measurement is OFF

34 Door Open Door open. Door closed. Status of cubicle door. Only valid if hardware option installed.

35 Switch Function Function is ACR Function is LBS


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36 Auxiliary Supply Fail Delayed

Auxiliary supply has failed for more than 120 seconds.

Auxiliary supply restored for more than 20 seconds.

Status of controller auxiliary supply (delayed).


Note 1. Not available with standard U series without external CVTs, always 0.

LBS Protection Group Flags

Bit

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40 Prot A Active Protection Group A is active

Protection Group A is not active

Only one protection group is active at any one time.

41 Prot B Active Protection Group B is active

Protection Group B is not active

42 Prot C Active Protection Group C is active

Protection Group C is not active

43 Prot D Active Protection Group D is active

Protection Group D is not active

44 Prot E Active Protection Group E is active

Protection Group E is not active

45 Prot F Active Protection Group F is active

Protection Group F is not active

46 Prot G Active Protection Group G is active

Protection Group G is not active

47 Prot H Active Protection Group H is active

Protection Group H is not active

48 Prot I Active Protection Group I is active

Protection Group I is not active

49 Prot J Active Protection Group J is active

Protection Group J is not active

LBS Detection Flags This group of points indicates what happened in the most recent fault detection. Unlike the ACR, these flags don’t attempt to reconstruct a fault sequence. The flags are not cumulative, they are cleared as each new fault is detected. For example, if there is an earth fault followed by a phase fault, the earth fault flag will be cleared when the phase fault flag is set. In addition analogue data is available which shows the fault currents. Most of these flags are cleared either by protocol command or when the switchgear is tripped/closed by the operator or when a new fault is detected. This data is volatile, i.e. it is zeroed on controller software reset. If there is more than one protocol running simultaneously in the controller this data is replicated between the protocols so that each master station can clear its data independently from the others..


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Bit

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‘1’

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Com

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50 Sequence in Progress Start of sequence that is the Supply Interrupt count is non-zero

End of sequence This shows that a detection sequence has started and not yet completed.

51 A Phase Overcurrent Fault

A Phase Overcurrent Fault Cleared by • Operator trip

These flags show which elements were

52 B Phase Overcurrent Fault

B Phase Overcurrent Fault • Any close picked up since last clear action

53 C Phase Overcurrent Fault

C Phase Overcurrent Fault • ‘Reset Flags’ Protocol Command

54 Earth/Ground Overcurrent Fault

Earth/Ground Overcurrent Fault

• Supply Reset (if enabled)

55 SEF/SGF Overcurrent Fault

SEF/SGF Overcurrent Fault

56 Supply Interrupt Supply Interrupt Set if a supply interrupt occurred after the most recent fault

57 Sectionaliser Trip Sectionaliser Trip Set if switch trips to sectionalise

58 Operator Trip The most recent trip was caused by any trip that was not caused by the CAPM internal protection (i.e. A combination of an OCPM Operator Trip OR an IOEX Operator Trip OR a Protocol Trip OR WSOS Trip)

59 OCPM Operator Trip The most recent trip was caused by a local or remote operator panel trip.

60 IOEX Operator Trip The most recent trip was caused by an IOEX Operator Trip input


61 Reserved 62 Fast Trip The most recent trip was

caused by a Fast Trip Input. 63 Protocol Trip The most recent trip was

caused by a remote protocol or WSOS trip request.

Cleared by • Any close • Reset Flags'

Protocol Command

64 Generator Control Generator Control is ON. Generator Control is OFF. Generator Control Enable.


LBS IOEX Inputs


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68 IOEX Input 1 Y Input Asserted Input Not Asserted 69 IOEX Input 2 Y Input Asserted Input Not Asserted 70 IOEX Input 3 Y Input Asserted Input Not Asserted 71 IOEX Input 4 Y Input Asserted Input Not Asserted 72 IOEX Input 5 Y Input Asserted Input Not Asserted 73 IOEX Input 6 Y Input Asserted Input Not Asserted 74 IOEX Input 7 Y Input Asserted Input Not Asserted 75 IOEX Input 8 Y Input Asserted Input Not Asserted 76 IOEX Input 9 Y Input Asserted Input Not Asserted 77 IOEX Input 10 Y Input Asserted Input Not Asserted 78 IOEX Input 11 Y Input Asserted Input Not Asserted 79 IOEX Input 12 Y Input Asserted Input Not Asserted

Returned State changes after 30ms debounce.

LBS Operator/Detection Flags


80 Phase Detection Enabled

Phase Detection ON Phase Detection OFF

81 Earth / Ground Detection Enabled

Earth / Ground Detection ON

Earth / Ground Detection OFF

82 SEF/SGF Detection Enabled

SEF/SGF Detection ON

SEF/SGF Detection OFF

83 Sectionaliser Auto

Sectionaliser Auto ON Sectionaliser Auto OFF

84 Cold Load Auto Cold load pickup is in Auto. This means that the cold load function is functioning and may, or may not, be affecting the threshold multiplier. This is indicated by the Cold Load not the Idle flag below.

Cold Load pickup is OFF. This means that the cold load function is completely disabled.

85 Cold Load Idle Cold Load is Idle or is turned off. This means that the threshold multiplier is not being affected by the cold load function.

Cold load is NOT Idle. This means that the threshold multiplier is being raised by the cold load pickup function in order to pick up cold load.

86 Live Load blocking

Live Load blocking ON Live Load blocking OFF

87 Automatic Detection Group Selection

Automatic Detection Group Selection ON

Automatic Detection Group Selection OFF


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88 Operator Close Set if the most recent close caused by local or remote panel close request.

The most recent close was caused by a local or remote panel close request.

89 IOEX Close Set if the most recent close was caused by an IOEX close input.

The most recent close was caused by an IOEX close input.

90 Protocol Close Set if the most recent close caused by a protocol close request.

Cleared by one of the following actions • 'Reset Flags and

Currents' protocol command.




The most recent close caused by a protocol close request.

91 External Close Set if any of the following caused the most recent close: • CCEM external

button on N-Series.

• Mechanical action. The switchgear detected as closed without a close request.

• Electrical action (only available on the Advanced controller).

Cleared by one of the following actions: • 'Reset Flags and



• At the time of the next Trip.

The most recent close caused by an action external to the Controller.

92 Live Load Block Occurred

Set if the most recent close request was blocked due to a Live Load condition.

Cleared by one of the following actions • 'Reset Flags and





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Appendix D.2LBS Modbus - Analogue Inputs These are the analogue input status points that are available. They are stored in holding registers in the CAPM. Each holding register is 16 bits wide. The phase designation A, B, C is determined by the user, refer to the equipment manual for more information. Phase terminology is explained in section 2.3. W series: support is indicated in tables below by a ‘Y’. If indicated as ‘N’ then value is always 0. Scaling Modbus analogue values are transmitted as a 16 bit value with an additional sign bit. Where the CAPM range of analogue values exceeds the range of a 16 bit number (-32768 to 32767) the values are scaled. All analogue values are scaled with 1 count = 1 Resolution/Units. In other words, 1 transmitted count = raw value ÷ resolution. For example: a phase voltage of 1000V will be transmitted as a count of 5050 (=1000 ÷ 2) The transmitted value must therefore be re-scaled at the master station before being displayed to the SCADA operator, logged, etc. Modbus Implementation Request Code(s): 03 (Read Holding Registers) Reply Codes(s): 03 (Read Holding Registers) Error Code: 0x83 Exception Code: 01 (Illegal Function), 02 (Illegal Data Address), 03 (Illegal Data Value), 04 (Slave Device Failure) LBS Analogue Inputs LBS Line Currents Note that these relate to user-designated phases rather than the physical bushings.

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0 A-Phase Current 0 16000 1 A 1 B-Phase Current 0 16000 1 A 2 C-Phase Current 0 16000 1 A 3 (Earth / Ground) Current 0 16000 1 A

LBS Voltage Measurements Voltages are provided either for all 6 Terminals or for only 3 Terminals depending upon the model of LBS.

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4 Ai Phase-(Earth / Ground) Voltage 0 40000 2 V 5 Bi Phase-(Earth / Ground) Voltage 0 40000 2 V 6 Ci Phase-(Earth / Ground) Voltage 0 40000 2 V 7 Ax Phase-(Earth / Ground) Voltage 0 40000 2 V 8 Bx Phase-(Earth / Ground) Voltage 0 40000 2 V 9 Cx Phase-(Earth / Ground) Voltage 0 40000 2 V 10 A-Bi Phase-Phase Voltage 0 40000 2 V 11 B-Ci Phase-Phase Voltage 0 40000 2 V 12 C-Ai Phase-Phase Voltage 0 40000 2 V 13 A-Bx Phase-Phase Voltage 0 40000 2 V 14 B-Cx Phase-Phase Voltage 0 40000 2 V 15 C-Ax Phase-Phase Voltage 0 40000 2 V


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16 Frequency Note 2 45 65 0.1Hz Note 1. Not available in standard U-series ACR without external CVTs. Value always zero. 2. Only available on CAPM5/6. Return 0 if unavailable. LBS System Power

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17 System kW This can be a signed quantity that indicates direction of power flow, or an unsigned quantity that is always positive regardless of the direction of the power flow. This is determined by the controller configuration

-131 MW 131MW 4 kW

18 System Apparent Power 0 131MVA 4 kVA 19 System Reactive Power

Unsigned quantity which is always positive irrespective of direction of power flow

0 131MVAR 4 kVAR

20 System Power Factor Note 1

This is calculated from Real and Apparent power. 0.00 1.00 0.01

Note 1. All data is transmitted as integers. Power factor has an extra built in scale factor of 100 ie. range 0.00 to 1.00 with

resolution 0.01 is transmitted as 0 to 100 with resolution 1. LBS SF6 Pressure If the LBS Memory Data is not valid then the pressure is zeroed. Gas Pressure is not supported on U-series, value will be zero.

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21 Gas Pressure, kPag. -100 300 1 kPaG 22 Gas Pressure, PSI -14 44 1 PSI

LBS Switchgear and Controller Details

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23 Reserved 24 I Contact Life Note 1 0.0 100.0 0.01 % 25 II Contact Life Note 1 0.0 100.0 0.01 % 26 III Contact Life Note 1 0.0 100.0 0.01 % 27 Operations Counter Note 2 0 4095 1 Operation


N00-665 R05 Page 57

28 Phase Designation 0 = A-B-C 1 = A-C-B 2 = B-A-C 3 = B-C-A 4 = C-A-B 5 = C-B-A The order A-B-C indicates the mapping between phases (A, B, C) and bushing (I-II-III). For example designation 2 maps B phase to I, A phase to II and C phase to III. The phase designation is set up on the controller so that the data in the database matches the HV terminal wiring.

0 5 1

Note 1. All data is transmitted as integers. Contact life has an extra built in scale factor of 10 ie range of 0.0% to 100.0%

with resolution 0.1% is transmitted as 0 to 1000 with resolution 1. 2. This value is zeroed when LBS Memory Valid is not valid. LBS Fault Detection Data

These analogue points record data about the fault detection including maximum fault currents. These are derived from the max current events, which are seen in the Operator Control Panel event record and record the current for each phase and for earth/ground. For any one fault more than one fault current can be set. For example a Phase/Phase fault might set an A-Phase current and a B-Phase current. Other data recorded includes the supply interrupt count and the Detection Group which was active at the time of the fault detection. Fault Detection Data is cleared to zero by the following actions :- • “Reset Fault Current” remote control command defined below • Any Operator Close or Trip action • New fault detected This data is volatile, that is they are zeroed on controller software reset. If there is more than one protocol running simultaneously in the controller this data is replicated between the protocols so that each master station can clear its data independently from the others.

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29 Active Detection Group The number of the Detection Group active during the sequence.

0 9 1

30 Supply Interrupt Count The number of Supply Interrupts Counted.

1 10 1

31 Most Recent A-Phase Fault Written on a Max Current event for A Phase

0 16000 1 A

32 Most Recent B-Phase Fault Written on a Max Current event for B Phase

0 16000 1 A

33 Most Recent C-Phase Fault Written on a Max Current event for C Phase

0 16000 1 A

34 Most Recent Earth/Ground Fault Current - Written on an E-Max event. This includes SEF/SGF Fault currents.

0 16000 1 A


N00-665 R05 Page 58

LBS Detection State

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35 Cold Load Value is zero when Cold Load is Idle or OFF. When Cold Load is not idle this shows the operational cold load time, i.e. the current time being used to calculate the operational cold load threshold multiplier.

Y 0 480 Mins

36 Active Detection Group 0 = Group A 1 = Group B … 9 = Group J

Y 0 9 1

LBS Fault Counters These counters are cleared by the ‘reset flags’ command. These counters do not increment when switchgear is an ACR. When the counters reach there max value, they do not roll-over, instead they ‘stick’ at this max value.

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37 A Phase O/C Fault Counter Y 0 99 1

38 B Phase O/C Fault Counter N 0 99 1

39 C Phase O/C Fault Counter N 0 99 1

40 Earth O/C Fault Counter N 0 99 1

41 SEF O/C Fault Counter N 0 99 1

42 Reserved

LBS Load Currents

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43 A Phase Load Current Prior to Last Pickup Note 4

Y 0 16000 1A

44 B Phase Load Current Prior to Last Pickup Note 4

N 0 16000 1A

45 C Phase Load Current Prior to Last Pickup Note 4

N 0 16000 1A


N00-665 R05 Page 59

LBS Automation Data

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46 Generator Control Status

• 0 - GenCtrl OFF.

• 1 - Switch Closed.

• 2 - Line Dead Check.

• 3 - Wait Switch Open.

• 4 - Wait Generator Live.

• 5 - Generator Running.

• 6 - Line Live Check.

• 7 - Wait Generator OFF.

• 8 - Wait Switch Closed.

Y 0 8 N/A

47 Reserved

LBS Daily Data

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48 Reserved

49 Time of Maximum Average Current This is the end time of the maximum average demand current of all relevant phases for the previous full day ending at midnight. The time is in minutes since midnight.

Y 1 1440 Mins

50 Average Demand Current This is the maximum average demand current of all relevant phases for the previous full day ending at midnight.

Y 0 16000 Amps

51 Average Sampling Period This was the average sampling period at the end of the previous day (either the Average Demand or Configured History period).

Y 1 1440 Mins

LBS Accumulator Data These points use two holding registers. They are signed 32 bit numbers (-2147483648 to 2147483647). The first register contains the least significant bits.


N00-665 R05 Page 60

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52 KWH Cumulative Note 1 Y 0 2147483647 1 KWH 54 Source Outages Note 2 Y 0 2147483647 1 Count 56 Source Outage Duration Note 2 Y 0 2147483647 1 Seconds 58 Load Outages Note 2 Y 0 2147483647 1 Count 60 Load Outage Duration Note 2 Y 0 2147483647 1 Second 62 Reserved 64 KWH Cumulative Forward

The accumulated kWH in the forward direction (ie Source to Load) at the last freeze and reset operation. This data is volatile, and is zeroed on controller software reset. If more than one protocol is running simultaneously in the controller, this data is replicated between the protocols so each master station can clear its data independently from the others.

Note 3

Y 0 2147483647 1 KWH

66 KWH Cumulative Reverse The accumulated kWH in the reverse direction (ie Load to Source) at the last freeze and reset operation. This data is volatile, and is zeroed on controller software reset. If more than one protocol is running simultaneously in the controller, this data is replicated between the protocols so each master station can clear its data independently from the others.

Note 3

Y 0 2147483647 1 KWH

Note: 1. This accumulates the total kWH flowing through the ACR.

If the controller is set for Power Flow Unidirectional then the cumulative total increases irrespective of the direction of power flow to show the total power that has passed through the device. If the controller is set to Bi-Directional power flow then the cumulative total can increase or decrease reflecting the nett power flow.

2. The power flow direction (source/load designation) is determined by the user. Refer to Power Flow Direction Binary Input for status and Binary Output for control.

3. Use relevant Digital Control (55 or 56) to collect data. 4. Average taken from either the Demand or Configured History period.


N00-665 R05 Page 61

Appendix D.3 LBS Modbus - Digital Control Both the "force coil ON" and "force coil OFF" are valid. Modbus Implementation Request Code(s): 05 (Force Single Coil) Reply Codes(s): 05 (Force Single Coil) Error Code: 0x85 Exception Code: 01 (Illegal Function), 02 (Illegal Data Address), 03 (Illegal Data Value), 04 (Slave Device Failure)

Coil Name On = ‘1’ Off = ‘0’ Comment

0 Work Tag Applies Work Tag. Rejected if: • CAPM is in LOCAL

Mode

Removes Work Tag. Rejected if: • CAPM is in LOCAL Mode.

1 Reserved 2 Reserved 3 Reserved 4 LBS Control

Close Rejected if: • Close coil is isolated • CAPM is in LOCAL

control mode • SF6 gas pressure is low (if

applicable) AND low gas lockout is ON

• Work Tag is applied • Switchgear data invalid • Mechanically interlocked

(if applicable) • Live load blocking ON

AND any load side terminal live

• Trip and/or Close capacitors are charging or failed

Trip Rejected if: • Trip coil is isolated • SF6 gas pressure is low (if

applicable) AND low gas lockout is ON

• Switchgear data invalid

5 Reset Fault Flags and Currents Note 1

Resets all Analog Fault Currents to zero and clears all binary Detection trip flags

No Action

6 Reserved 7 Power Flow Direction

Note 1 Source X, Load I Source I, Load X

8 Reserved 9 Reserved 10 Reserved 11 Cold Load Idle/Max Set cold load time to its

maximum value. This means that the cold load threshold current will be set to its maximum value Rejected if: • Cold load support is OFF

Set cold load time to zero. This means that the threshold multiplier will not be affected by the cold load function. Rejected if: • Cold load support is OFF

12 Reserved


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13 Reserved 14 Reserved 15 Live Load Blocking Live Load blocking ON Live Load blocking OFF 16 Freeze/Reset Freezes the KWH Cumulative

accumulator value ready for transmission and resets the running count back to zero

17 Dummy Circuit Breaker

DCB Close DCB Trip The dummy circuit breaker is an internal point useful for SCADA system testing.

18 Automatic Detection Group Selection

ADGS ON Rejected if: • ADGS ON is Not

Allowed • Loop Automation ON

ADGS OFF


Measurement Control

Supply Outage Measurement ON

Supply Outage Measurement OFF

21 Supply Outage Measurement Reset

Resets all Supply Outage counters values.

No Action

22 Reserved 23 Sectionaliser Auto

Turn Sectionalising ON

Turn Sectionalising OFF.

24 Reserved 25 Reserved 26 Reserved 27 Reserved 28 Detection Group A Group A ON No Action 29 Detection Group B Group B ON No Action 30 Detection Group C Group C ON No Action 31 Detection Group D Group D ON No Action 32 Detection Group E Group E ON No Action 33 Detection Group F Group F ON No Action 34 Detection Group G Group G ON No Action 35 Detection Group H Group H ON No Action 36 Detection Group I Group I ON No Action 37 Detection Group J Group J ON No Action

Only one group can be active at any time. Activating any of these protection groups will automatically reset the previous setting.

38 Reserved 39 Reserved 40 Reserved 41 Reserved 42 Protocol IOEX Control

1 43 Protocol IOEX Control

2 44 Protocol IOEX Control

3

Sets an IOEX configurable point. Note: The only valid Control Type is ‘Sustained’.

Clears an IOEX configurable point. Note: The only valid Control Type is ‘Sustained’.

Sets or clears an IOEX-configurable point, for Protocol Controls.


N00-665 R05 Page 63







50 Reserved 51 Reserved 52 Reserved 53 Generator Control Turn Generator Control on.

Rejected if: • Generator Control is not

available. • Loop Automation is

available. • Auto-changeover is

available.

Turn Generator Control Off.

Generator Control enabled.

54 Reserved 55 Freeze/Reset kWH

Accum Fwd kWH Cumulative Forward Accumulator freeze/reset operation.

.

Freezes the kWH Cumulative Forward accumulator value ready for transmission and resets the running count back to zero

56 Freeze/Reset kWH Accum Rev

kWH Cumulative Reverse Accumulator freeze/reset operation.

Freezes the kWH Cumulative Reverse accumulator value ready for transmission and resets the running count back to zero.

Note: 1 Changing the Source/Load direction affects the following aspects of the operation of the controller:

• Whether the source or load corresponds to I side or X side on the voltage measurements • Which side is the source or load for the Live Load Blocking • Which side is the source or load for the Directional Blocking • Which direction is positive power flow for the System Power measured value • Power Flow Direction Binary Input status


N00-665 R05 Page 64

Appendix D.4 LBS Modbus - Analogue Control These are the registers able to be preset by the controller. If W series is indicated as 'Y' below then register is supported other wise no action is taken. Modbus Implementation Request Code(s): 06 (Preset Single Register) Reply Codes(s): 06 (Preset Single Register) Error Code: 0x86 Exception Code: 01 (Illegal Function), 02 (Illegal Data Address), 03 (Illegal Data Value), 04 (Slave Device Failure) LBS Analog Controls

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0 Reserved 1 Detection Group selection

0 = Group A 1= Group B … 9 = Group J

0 9 N/A


N00-665 R05 Page 65

Appendix E CAPM2 Modbus Point Map This point map emulates the CAPM2 point map as defined in N00-424.pdf (ACR Only).

Appendix E.1 Data Available over Modbus This data is read using functions 3 for analog and 2 for digital only. Zeros are returned for all addresses scanned outside of the ranges defined in the following tables. Holding Register

Description Units Minimum Value

Maximum Value

0 U phase current Amps x 1 0 800 1 V phase current Amps x 1 0 800 2 W phase current Amps x 1 0 800 3 Earth current Amps x 1 0 800 4 U phase/earth voltage Volts x 1 0 25,000 5 V phase/earth voltage Volts x 1 0 25,000 6 W phase/earth voltage Volts x 1 0 25,000 7 System Apparent Power kVA x 1 0 30,000 8 System Real Power (signed 2’s compliment) kW x 1 -30,000 30,000 9 System Reactive Power kVAR x 1 0 30,000 10 Digital Status 1 (see below) 11 Digital Status 2 (see below)

Note: Do not request any holding registers beyond this Digital Status 2. It will result in an exception.

Digital status information is as follows. Bit offset of zero implies the least significant bit in the word.

Digital Status Word 1 Bit Description Set Condition Clear Condition 0 Closed Signal Switchgear is closed Switchgear is open or

disconnected 1 Open Signal Switchgear is open Switchgear is closed or

disconnected 2 Trip Isolate The trip isolate switch

on the operator control panel is in the ISOLATE position

The trip isolate switch on the operator control panel is in the CONNECTED position

3 Close Isolate The close isolate switch on the operator control panel is in the ISOLATE position

The close isolate switch on the operator control panel is in the CONNECTED position

4 Operational Status

Remote control of the ACR is allowed. This means that Modbus function 5 will be enabled. This only occurs when controller is in Remote Mode

Remote control of ACR is not allowed. This means that Modbus function 5 will be disabled and will return a NAK. This occurs when the controller is in Local or Do Not Operate Modes.

5 Auto Reclose Auto Reclose mode is set One shot to lockout mode is set.


N00-665 R05 Page 66

Digital Status Word 1 Bit Description Set Condition Clear Condition 6 Cold Load

Pickup Cold load pickup is ON Cold load pickup is OFF

7 Earth Fault Earth fault protection is ON

Earth fault protection is OFF

8 SEF SEF protection is ON SEF protection is OFF 9 Auxiliary Supply Auxiliary supply is

Failed Auxiliary supply is Normal

10 Battery Battery status is Failed Battery status is Normal 11 SF6 Pressure SF6 Pressure is Low or

not available SF6 Pressure is Normal

12 Phase Prot Trip Phase Protection Tripped the ACR

Recloser Closed or trip was from some other source.

13 Earth Prot Trip Earth Fault Protection Tripped the ACR


14 SEF Prot Trip Sensitive Earth Fault Protection Tripped the ACR


15 Lockout The ACR is open and in lockout so that it will not close again automatically. It must be closed by either local or remote control.

The ACR not in lockout. It is either closed or is in an auto-reclose sequence.


N00-665 R05 Page 67

Digital Status Word 2

Bit Description Set Condition Clear Condition

0 Toggle This bit toggles on and off every 50 seconds (ie. Period 100 seconds).

1 System Healthy See Note 1 2 Protection A Protection Set A Selected Protection Set A Not

Selected 3 Protection B Protection Set B Selected Protection Set B Not

Selected Note 1 - System healthy is set only when all of the following conditions are met. • Electronics OK • Contact Wear >=20% on all three phases. • Aux supply Normal • Battery Normal • Trip and Close isolate switches in the connected position. • Gas pressure normal. Also Note: If neither protection set A or B are set, then protection has been turned OFF.


N00-665 R05 Page 68

Appendix E.2 Controls Available over Modbus The following controls are supported by function 5 (force single coil). Note that in this implementation: -

• Only the “force coil ON” command is valid. The “force coil OFF” command is rejected. • The coils are addressed as shown in the table below. • Controls are only supported when the controller is in the Remote mode. If the controller is

in the Local or Do Not Operate mode then the response is 07 (NAK). • A correctly formatted control is always replied to. However this does not mean that the

action has been correctly carried out, the master must make this check using the read register command. For example, if a “close” command is transmitted but the switchgear either fails to close or the close is defeated by the close isolate switch being in the isolated position, then control will still be acknowledged to the master.

Coil Action

0 Close ACR 1 Trip ACR 2 Auto-Reclose ON 3 One shot to lockout ON 4 Cold load pickup ON 5 Cold load pickup OFF 6 Earth fault protection ON 7 Earth fault protection and SEF protection OFF 8 SEF protection ON and Earth Fault Protection ON* 9 SEF protection OFF 10 Select Protection Set A (Turns Protection ON) 11 Select Protection Set B (Turns Protection ON)

*This control has no effect when SEF set to “Not Available” on protection settings page


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Appendix F CAPM2 N00-321 and N00-360 Modbus Point Map This point map emulates the CAPM2 point map as defined in N00-321.pdf and N00-360.pdf documents (ACR Only).

Appendix F.1 Data Available over Modbus This data is read using functions 3 for analog and 2 for digital only. Zeros are returned for all addresses scanned outside of the ranges defined in the following tables. Holding Register

Description Units Minimum Value

Maximum Value

0 U phase current Amps x 1 0 800 1 V phase current Amps x 1 0 800 2 W phase current Amps x 1 0 800 3 Earth current Amps x 1 0 800 4 U phase/earth voltage Volts x 1 0 25,000

(note 1) 5 V phase/earth voltage Volts x 1 0 25,000

(note 1) 6 W phase/earth voltage Volts x 1 0 25,000

(note 1) 7 System Apparent Power kVA x 1 0 30,000 8 System Real Power (signed 2’s compliment) kW x 1 -30,000 30,000 9 System Reactive Power kVAR x 1 0 30,000 10 Digital Status 1 (see below) 11 Digital Status 2 (see below)

Note: Do not request any holding registers beyond this Digital Status 2. It will result in an exception.

Note 1: The maximum specified for N00-321 is 15000. The value returned is the actual line to earth voltage as measured and is not limited to a maximum other than the register maximum capacity. Digital status information is as follows. Bit offset of zero implies the least significant bit in the word.

Digital Status Word 1 Bit Description Set Condition Clear Condition 0 Closed Signal Switchgear is closed Switchgear is open or

disconnected 1 Open Signal Switchgear is open Switchgear is closed or

disconnected 2 Trip Isolate The trip isolate switch

on the operator control panel is in the ISOLATE position

The trip isolate switch on the operator control panel is in the CONNECTED position

3 Close Isolate The close isolate switch on the operator control panel is in the ISOLATE position

The close isolate switch on the operator control panel is in the CONNECTED position

4 Operational Status

Remote control of the ACR is allowed. This means that Modbus function 5 will be

Remote control of ACR is not allowed. This means that Modbus function 5 will be disabled and will


N00-665 R05 Page 70

Digital Status Word 1 Bit Description Set Condition Clear Condition

enabled. This only occurs when controller is in Remote Mode

return a NAK. This occurs when the controller is in Local or Do Not Operate Modes.

5 Auto Reclose Auto Reclose mode is set One shot to lockout mode is set.

6 Cold Load Pickup

Cold load pickup is ON Cold load pickup is OFF

7 Earth Fault Earth fault protection is ON

Earth fault protection is OFF

8 SEF SEF protection is ON SEF protection is OFF 9 Auxiliary Supply Auxiliary supply is

Failed Auxiliary supply is Normal

10 Battery Battery status is Failed Battery status is Normal 11 SF6 Pressure SF6 Pressure is Low or

not available SF6 Pressure is Normal

12 Phase Prot Trip Phase Protection Tripped the ACR


13 Earth Prot Trip Earth Fault Protection Tripped the ACR


14 SEF Prot Trip Sensitive Earth Fault Protection Tripped the ACR


15 Lockout The ACR is open and in lockout so that it will not close again automatically. It must be closed by either local or remote control.

The ACR not in lockout. It is either closed or is in an auto-reclose sequence.


N00-665 R05 Page 71

Digital Status Word 2

Bit Description Set Condition Clear Condition

0 Toggle This bit toggles on and off every 50 seconds (ie. Period 100 seconds).

1 System Healthy See Note 1 2 Generator

Control Generator Control is ON Generator Control is OFF

Note 1 - System healthy is set only when all of the following conditions are met. • Electronics OK • Contact Wear >=20% on all three phases. • Aux supply Normal • Battery Normal • Trip and Close isolate switches in the connected position. • Gas pressure normal. Also Note: If neither protection set A or B are set, then protection has been turned OFF.


N00-665 R05 Page 72

Appendix F.2 Controls Available over Modbus The following controls are supported by function 5 (force single coil). Note that in this implementation: -

• Only the “force coil ON” command is valid. The “force coil OFF” command is rejected. • The coils are addressed as shown in the table below. • Controls are only supported when the controller is in the Remote mode. If the controller is

in the Local or Do Not Operate mode then the response is 07 (NAK). • A correctly formatted control is always replied to. However this does not mean that the

action has been correctly carried out, the master must make this check using the read register command. For example, if a “close” command is transmitted but the switchgear either fails to close or the close is defeated by the close isolate switch being in the isolated position, then control will still be acknowledged to the master.

Coil Action

0 Close ACR 1 Trip ACR 2 Auto-Reclose ON 3 One shot to lockout ON 4 Cold load pickup ON 5 Cold load pickup OFF 6 Earth fault protection ON 7 Earth fault protection and SEF protection OFF 8 SEF protection ON and Earth Fault Protection ON* 9 SEF protection OFF 10 Reset Fault Flags (resets all fault flags) 11 Generator Control ON 12 Generator Control OFF

*This control has no effect when SEF set to “Not Available” on protection settings page

Nu-Lec_MODBUS - Technical Manual

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