MAX DNA DPU_a1

Model PDP DPUInstallation, Preparation

and Adjustment

277573 Rev. A1

Metso Automation MAX Controls •••• 277573 ••••

Refer to this publication for complete and accurate information that helps you better operate and service MetsoAutomation MAX Controls equipment. Your comments and suggestions are welcome.

Metso Automation MAX Controls1180 Church RoadLansdale, PA 19446Attention: Manager, Technical Publications

Copyright 1999-2001 by Metso Automation MAX Controls Inc.Printed in the United States of America

All rights reserved


Contents

PREFACE ........................................................................................................................... III

CHAPTER 1 ...................................................................................................................... 1-1

Introduction................................................................................................................................................................. 1-1Distributed Processing Unit Functionality ................................................................................................................ 1-1

Distributed Processing Unit Hardware .............................................................................................................. 1-1Distributed Processing Unit Specifications ....................................................................................................... 1-2

Mounting the DPU ................................................................................................................................................ 1-2Positioning the DPU.......................................................................................................................................... 1-2Mounting Procedures ........................................................................................................................................ 1-3

Wiring the DPU .................................................................................................................................................... 1-3

CHAPTER 2 ...................................................................................................................... 2-1

DPU Front Panel ......................................................................................................................................................... 2-1Overview................................................................................................................................................................... 2-1

Mode Select DIP Switch Settings.......................................................................................................................... 2-1Data Highway Area ............................................................................................................................................... 2-2

Using Rotary Switches to Set Station Address .................................................................................................. 2-2Two LED Displays............................................................................................................................................ 2-3IOM Load.......................................................................................................................................................... 2-3

Status Section (LEDs) ........................................................................................................................................... 2-4DPU Hardware Status LEDs ............................................................................................................................. 2-4Serial I/O and DPU Status Section.................................................................................................................... 2-4Backup Status LEDs.......................................................................................................................................... 2-5

Reset Button.......................................................................................................................................................... 2-6Backup Link.......................................................................................................................................................... 2-6CPU Load.............................................................................................................................................................. 2-6Takeover Button.................................................................................................................................................... 2-6Backup DIP Switch Settings ................................................................................................................................. 2-6DPU Keyswitch..................................................................................................................................................... 2-7

CHAPTER 3 ...................................................................................................................... 3-1

Input/Output Connections.......................................................................................................................................... 3-1Data Highway............................................................................................................................................................ 3-1

ACSII Ports ....................................................................................................................................................... 3-1

Model PDP DPU Installation, Preparation and Adjustment


CHAPTER 4.......................................................................................................................4-1

DPU Battery and Fuse Maintenance ......................................................................................................................... 4-1Battery Types ............................................................................................................................................................ 4-1

Replacing the NiCd Battery Pack (Battery #2)...................................................................................................... 4-1Replacing the Lithium Battery (Battery #1) .......................................................................................................... 4-2Replacing DPU Fuses............................................................................................................................................ 4-3

CHAPTER 5.......................................................................................................................5-1

Backing up the DPU.................................................................................................................................................... 5-1Overview................................................................................................................................................................... 5-1

Automatic Failover/Manual Takeover............................................................................................................... 5-1Automatic Failover............................................................................................................................................ 5-1Manual Takeover............................................................................................................................................... 5-1Cable Disconnect............................................................................................................................................... 5-2

CHAPTER 6.......................................................................................................................6-1

Starting the DPU ......................................................................................................................................................... 6-1Startup States............................................................................................................................................................. 6-1

Demanding a Cold Startup .................................................................................................................................... 6-2Starting a Standalone DPU.................................................................................................................................... 6-2Starting a Backup Pair of DPUs ............................................................................................................................ 6-3Replacing a DPU in a Backup Pair........................................................................................................................ 6-5

CHAPTER 7......................................................................................................................7-1

Using Interaction Pages ............................................................................................................................................. 7-1Accessing Displays.................................................................................................................................................... 7-1

Using Interaction Page 9 Display with a Workstation........................................................................................... 7-1Startup ............................................................................................................................................................... 7-1Backup Option................................................................................................................................................... 7-1Digital Input Filter Time Field .......................................................................................................................... 7-2Serial Ports Field ............................................................................................................................................... 7-2Lockout and Log Options Field......................................................................................................................... 7-2

Using Interaction Page 9 Display with an Operator Station .................................................................................. 7-2Startup ............................................................................................................................................................... 7-4Backup Option Field ......................................................................................................................................... 7-4Stat Page Field................................................................................................................................................... 7-4DIO Inventory Field .......................................................................................................................................... 7-4Digital Input Filter Time Field .......................................................................................................................... 7-5Analog Input Inventory Field ............................................................................................................................ 7-5Redundant I/O Address Ranges Field................................................................................................................ 7-5Lockout and Log Options Field......................................................................................................................... 7-5Serial Ports Field ............................................................................................................................................... 7-5

Interaction Page 10................................................................................................................................................ 7-6Event Queue Pointer Information...................................................................................................................... 7-7

Interaction Page 11................................................................................................................................................ 7-8Interaction Page 12................................................................................................................................................ 7-9Interaction Page 13.............................................................................................................................................. 7-10

Contents

v

CHAPTER 8 ..................................................................................................................... 8-1

Alarms and Diagnostics .............................................................................................................................................. 8-1Annunciation of Alarms ............................................................................................................................................ 8-1

Front Panel Numeric LEDs ............................................................................................................................... 8-1


Preface

The Distributed Processing Unit described in this publication consists of twomodels, the Model PDP001 Series and the Model PDP100 Series. From ahardware perspective, the two models are virtually identical. At the softwarelevel, however, the two models contain different firmware. The Version 7.1Firmware makes the Model PDP100 Series compatible with the IEC 1131-3toolset. The Model PDP001 Series supports Metso Automation MAXControls EXtended Control Engineering Language (ExCEL), a MetsoAutomation MAX Controls programming language, and ladder logic.

In addition to DPU front panel controls, to a limited extent you may controla DPU from the maxSTATION running maxVUE Runtime software.maxVUE Runtime also lets you monitor DPU status, DPU-related alarms,and access DPU Interaction Pages, containing data and system statisticsstored in the DPU. Interaction Pages are described in Chapter 3. FormaxVUE Runtime information, refer to Publication 277557, MaxSTATIONOperator' s Guide. You may reload a DPU's configuration from themaxSTATION running maxTOOLS software. Refer to the maxTOOLSonline help supplied with the package for configuration installationinstructions.


Chapter 1

Introduction

Distributed Processing Unit FunctionalityThe Model PDP Distributed Processing Unit (DPU) performs primary dataacquisition, control, and data processing functions for the maxDNADistributed Control System. The DPU is a self-contained microprocessor-based, rack-mounted unit, which occupies a single slot in a RemoteProcessing Unit cabinet. It is designed to operate with user-definedcombinations of maxDNA Model IOP Input/Output Modules, and tocommunicate with other devices, such as Programmable Logic Controllersand Remote Terminal Units.

As a station on the DPU Bus, the DPU scans and processes information foruse by other devices in the maxDNA system. Each DPU performs:

•Comprehensive alarming and calculations.

•Logging of Sequence of Events (SOE) data.

•Acquisition of trend information.

•Continuous scanning of Model IOP I/O modules.

•Execution of predefined Control and Data Blocks for process control anddata acquisition.

•Execution of user written programs using IEC1131-3 Toolset or MetsoAutomation MAX Controls EXtended Control Engineering Language(ExCEL).

•Ladder logic processing.

•Assurance of secure link-level data highway communications.

Distributed Processing Unit HardwareA DPU consists of three circuit cards installed in a rack-mounted chassis.The right front chassis panel contains two clockwise and counter-clockwiseconnectors, two serial ports, 10 terminal blocks, and the DPU keylock.


Metso Automation MAX Controls •••• 277573 ••••1-2

The processor cards mounted behind the gray and white front panel consistof the motherboard, Data Highway Card, and the Control Processor Card.The Data Highway Card and Control Processor Card are mounted asdaughter cards on the motherboard.

Except for the Control Processor Card, the front edge of each processor cardfeatures switches, indicator lamps, and rotary dials that are visible andaccessible from the DPU front panel.

Distributed Processing Unit SpecificationsOperating temperature range 0 to 60 degrees C

Storage temperature range (-)25 to 70 degrees C

Relative humidity range 5 to 90% noncondensing

Power requirements 24 Vdc ±4 Vdc, 1.2 amps

Mounting the DPUThe Model PDP Distributed Processing Unit (DPU) is mounted on theInput/Output (I/O) backplane with Model IOP Input/Output modules.

Positioning the DPUThe DPU must be mounted in the right most position of the Model IOP racksince the DPU is wider than the I/O cards and requires good air flow. In asix-wide I/O rack, the mounting bracket to the left of the DPU must beremoved since the DPU requires an I/O panel.

When using a second DPU for backup, it must be mounted verticallyadjacent to the primary DPU.

When the DPU is installed in the right most slot, the DPU cover extendsover the J3 and J4 connectors on the back panel. The standard daisy-chaincable (064353) is low profile, however, and will not cause any interference.

Any cables higher than 1 inch above the surface of the backplane, and anyterminators, will interfere with the cover. Some older cables, in particular,will interfere with the DPU cover. It may be possible to move the terminatorto the other end of the daisy-chain or to rearrange the order of thedaisy-chain cables to eliminate the interference.

If this is not possible, a cable adapter is available (Metso Automation MAXControls Part Number 081580). This adapter has a metal bracket whichmounts to the power strut and a 12-inch connecting cable plugs into J3 or J4on the back panel. It is a male-female adapter so that the original cable or

Introduction

Metso Automation MAX Controls •••• 277573 •••• 1-3

terminator can be plugged directly into the adapter out of the way ofinterference with the DPU.

The DPU is designed to allow installation and removal with the +24 V dcpower supply turned on.

Mounting ProceduresBefore mounting any hardware, refer to the cabling and field wiring sectionsof Publication 277563, Model IOP Input/Output System Installation and Pre-paration, for information also pertinent to mounting.

To install the DPU in the rack, refer to Chapter 6.

Wiring the DPUWith the exception of the 10 point terminal block on the front panel of theDPU chassis, no hard wiring is required. All connections between the DPUmodule and the DPU chassis are made upon installation into the I/O rack.Use maxTOOLS to create input designations for each DPU duringconfiguration.

Ten terminal board connectors, with #6 screws, are positioned at the lowerleft side of the DPU chassis. Pin-outs are as follows:

Table 1-1. Ten Point Terminal Block

PIN No. Purpose1-6 Reserved

7 Open

8, 9 DPU offline contact (photovoltaic relay, opens when the DPU isoffline)

Peak operating voltage = ±300V

Maximum load = 60 mA

On resistance = 30 Ohms

Off resistance = 1 mOhms (Contact is closed if DPU is online)

10 Circuit Ground


Mode Select

1 0

8421

CW

CCW

Off

On

Data Highway Off

On

Status Jabber

IOMLoad

Stn No.

G ActiveR OfflineY Inactive

State

Battery

Power

G- TxR- Rx

1Serial Ports2

G- ActiveR- Error

DI

DO

Per IO

Prog IO

TxBackupRx

Reset

CPU Load

BackupLink

Takeover

PriPIOSIO1SIO2

SepCom

Sec

Dis

tribu

ted

Pro

cess

ing

Uni

t

Chapter 2

DPU Front Panel

OverviewAll DPU controls, indicator lamps,keylock, and switches are located on theDPU front panel. Refer to Figure 2-1,DPU Front Panel. Use this front panel tomonitor or control different aspects ofthe DPU. This chapter describes andillustrates individual sections. Thevarious front panel features are generallypositioned in two vertical panel areascorresponding to supporting processorcard positions mounted behind the frontpanel.

Mode Select DIP Switch SettingsThe mode switches, located at the top ofthe front panel, are used during DPUmanufacturing and testing. For normalDPU operation, all four switches shouldbe set to the left. Setting the B (Blankdatabase) SW8, 2, 1 to the left, and SW4to the right during power on or resetcauses the DPU to erase its database andcome up cold. Once the DPU isoperational (DPU on DPU Bus), be sureto set the mode switches back to the left.

Figure 2-1. DPUFront Panel



Data Highway AreaThe Data Highway Area, (Figure 2-2), located in the upper right area of thegray front panel, consists of:

•Two toggle switches used to intentionally break the CW and/or CCWhighway connections to this DPU to simulate communications loss forsystems testing (e.g., cable break reporting) without actually disconnectingcables.

•Jabberhalt error LED to indicate timeout of excessively long transmissions.

•Two rotary switches to provide the station address; refer to next section.

•Two LED displays; refer to "Two LED Displays."

There are no internal switches or jumpers to be set during installation.

Figure 2-2. Upper Front Panel Area

DPU Front Panel


Using Rotary Switches to Set Station AddressUse the two rotary switches to configure a unique DPU highway stationaddress, a number ranging from 32 and 63; the station number is set inhexadecimal (hex). The upper switch sets the most significant digit of theaddress (e.g., 3 for Station 50). The lower switch sets the least significantdigit for the address (e.g., 2 for Station 50).

Hexadecimal Decimal

0 01 12 23 34 45 56 67 78 89 9A 10B 11C 12D 13E 14F 15

To convert a two-digit hexadecimal numberto decimal, multiply the first digit by 16 andadd the decimal value of the second digit.

2C hex = 2 * 16 + C= 32 + 12= 44

To convert decimal to hexadecimal, dividethe decimal number by 16 until a remainderof less than 16 is obtained:

50 decimal = 50÷16 = 3 (hex)with 2 (2 hex) remainder= 32 hex

Two LED DisplaysThe two seven-segment LED displays report highway status using hexnumbers. During DPU startup, the LEDs display FF. When the DPUconcludes its startup phase, the LEDs alternately display the codes 03, 04,and 07 to indicate:

(03) query response transfer is in progress

(04) token passing is in progress

(07 the DPU is executing normal background functions

If an error occurs in the DPU, causing it to fail, these LEDs display an errorcode. Refer to Chapter 8 for a listing of error codes.

IOM LoadMetso Automation MAX Controls Factory Service use only.



Status Section (LEDs)The middle area of the front panel contains 11 tri-colored LEDs (green, red,and yellow). Refer to Figure 2-3. The LEDs indicate the status of a variety oftasks, such as I/O bus scanning. Refer to the following tables for a list ofdefinitions for the color-coded LEDs.

DPU Hardware Status LEDsThe first three LEDs specifically relate to DPU hardware status.

LED What the Colors Mean

Active Green = DPU online and active.Offline Red = DPU offline.Inactive Yellow = DPU online but inactive (backup pair).

Battery Red = nickel cadmium or lithium battery bad.Yellow = nickel cadmium battery under test.Green = both batteries good.

Power Green = DPU powered.

Figure 2-3. Status LEDs

DPU Front Panel


Serial I/O and DPU Status Section


Serial port1 Green = serial port 1 transmitting.Red = serial port 1 receiving.

Serial port2 Green = serial port 2 transmitting.Red = serial port 2 receiving.

Status Section LED IndicatorsDI Fast Digital Input Scanning:

green = all points goodred = all points badyellow = some points good and some points badoff = no points executingDO Fast Digital Output Scanning:

green = all points goodred = all points badyellow = some points good and some points badoff = no points executingPer IO Periodic Input/Output scanning Analog

Inputs, Control Blocks, Data Blocks

green = all points goodred = all points badyellow = some points good and some points badoff = no points executingProg IO ExCEL Input/Output Scanning

green = all points goodred = all points badyellow = some points good and some points badoff = no points executing

Backup Status LEDsThe following two LEDs report backup link status.


RX green = Receiving data.TX green = Transmitting data.



Reset ButtonThe Reset pushbutton does not produce a true hard reset; when you pressthis button, the DPU receives a false indication of impending +24 Voltpower loss, causing the DPU to save the database into flash memory andwait for a power down that never occurs. However, a deadman timerassociated with the Control Processor Card will cause a true hard reset afterthis routine finishes, after which a cool initialization will occur.

Backup LinkWhen used with a backup DPU, a cable (Part 081387) runs between thisconnector on both DPUs.

When used without a backup DPU, a terminator (Part 081388) must beinstalled in this connector.

CPU LoadFor Metso Automation MAX Controls Factory Service use only.

Takeover ButtonWhen two DPUs are used in a backup configuration, press the Takeoverbutton on one of the DPUs to force that DPU to take control, making theother inactive.

Backup DIP Switch SettingsUse the four-position backup DIP switch to select various DPU backupconfigurations. If backup is not configured, the top most switch should be setto the right and the others to the left. Refer to Chapter 5.

The first position (top) on the DIP switch lets you designate the DPU asprimary or secondary. Primary is to the right.

The second position designates a separate or shared parallel input/outputbus. Common (Shared) is to the left. Separate is to the right.

Note: if you are configuring a mixed I/O system using some shared and someseparate I/O with a Y-Adapter, select Separate.

DPU Front Panel


The third position designates a separate or shared link connected to serialport 1. Separate is to the right. Common (Shared) is to the left.

The fourth position designates a separate or shared link connected to serialport 2. Separate is to the right. Common (Shared) is to the left.

DPU KeyswitchUse the DPU keyswitch, located at the bottom part of the DPU chassis, toselect one of three operator modes. The DPU can operate with the key inplace or removed; you can remove the key from the switch regardless of keyposition.

The keyswitch may be placed in one of the following three positions:

Run Keyslot horizontal

The DPU executes the functions defined in its pointdatabase. In this mode, you are permitted to reload a DPUdatabase; however you cannot configure Interaction Page 9.

Offline Keyslot diagonal, one-quarter turn counterclockwise fromRun.

In this mode, the DPU scans inputs but does not executeoutputs. To service the DPU, you may manually selectoffline by turning the keyswitch to this position.

Offline is imposed automatically with the keyswitch in run orlocked position when a fatal diagnostic is detected.

Locked Keyslot diagonal, one-quarter turn clockwise from Run.

In this mode, the DPU executes the functions defined in itspoint database. Reloads and database changes may or maynot be permitted, depending on the DPU configuration asshown on Interaction Page 9.


Chapter 3

Input/OutputConnections

Data HighwayThe upper left portion of the DPU chassis features two groups of male andfemale 9-pin D-type connectors used to connect the clockwise (CW) andcounter-clockwise (CCW) DPU Bus cables. Positions J2 and J3 are for CWconnections, and J4 and J5 are for CCW. For additional information onInput/Output connections, refer to Publication 277580, DPU Bus Cabling.

ACSII PortsDirectly below the DPU Bus connections are two female 25-pin D-typeconnectors (J6 and J7) which serve as ASCII serial ports. Table 3-1 providesthe pin-outs for both ports. These two ASCII ports provide linkage toprogrammable logic controllers, remote multiplexers, etc. Connections canbe RS-232, RS-422, or RS-485, chosen without jumpers, with properconnection to the 25-pin D-Connectors. When you define a DPU viamaxTOOLS, you may configure setup parameters, such as baud rate, parity,and number of stop bits. You may also enter setup information directly onInteraction Page 9. Remember, when you add this information, you musttake the DPU offline.

Table 3-1. ASCII Port Pin-outs (usable via ExCEL, Rev. 2)

Pin No. Purpose

24 Transmit Data TxD + (RS-422)2 Transmit Data TxD - (RS-422), or TxD (RS-232/423)23 Receive Data RxD + (RS-422)3 Receive Data RxD - (RS-422), or RxD (RS-232/423)4 Request-to-Send RTS (RS-232/423)5 Clear-to-Send CTS (RS-232/423)7 Circuit Ground1 Chassis Ground


Chapter 4

DPU Battery andFuse Maintenance

Battery TypesThe Model PDP DPU uses two battery types that must be replacedperiodically. A Nickel Cadmium (NiCd) rechargeable battery pack, mountedon the motherboard, allows the DPU to preserve its database when powergoes down. This battery, tested for one minute every hour, will raise a "bat-tery #2 weak" battery low alarm if it fails.

The DPU Control Processor Card uses a 360 maH Lithium battery topreserve CMOS settings and time and date. If this battery fails, a "battery #1weak" battery low alarm will be raised. The battery has a shelf life of 10years under "no load" conditions. When the DPU is powered, the battery iselectronically disconnected. The Control Processor Card battery will last formore than two years if no power is applied to the board.

Caution: The DPU contains devices that can be damaged by electrostaticdischarge. It is imperative that the DPU be carried in antistatic protectivebags. Grounded workstations and wrist straps must be used whenadjusting or performing any work on the DPU. If soldering irons are used,they must also be grounded.

Replacing the NiCd Battery Pack (Battery #2)Note: when the DPU is shipped or put in storage, always unplug the NiCdbattery pack from the P10 connector.

The DPU NiCd battery pack (Part number 081537) should be replaced atleast every three years. Spare NiCd battery packs have a shelf life of 5 to 7years.

The battery is located in an accessible compartment on the upper right sideof the DPU. To access the battery, you must remove the DPU from the rackas described in the following procedure:



To replace the battery:

1. Important: If the DPU to be serviced is part of a DPU pair, use theinstructions in Chapter 6, "Replacing a DPU in a Backup Pair," toextract the DPU. If the DPU to be serviced is configured standalone,place the keyswitch in the offline position and use the followinginstructions.

Gently slide the DPU module out of the cabinet rack and set the unitdown on an appropriate work surface, component side up.

2. Locate the battery compartment on the upper right side.

3. Remove the battery plug connector from the P10 port.

4. Remove the failed battery from its holder clips and dispose of itappropriately.

5. Slide the new battery pack in between the holder clips and plug thebattery's plug connector into the P10 port.

6. Install the DPU in the chassis using the appropriate procedure found inChapter 6," Starting a Standalone DPU," or "Replacing a DPU in aBackup Pair."

Replacing the Lithium Battery (Battery #1)The Lithium battery is mounted on the Control Processor board. Replace thebattery with a 360mAh TLS186 Tadiran battery or equivalent. (Part number081558).

To replace the battery:

1. Important: If the DPU to be serviced is part of a DPU pair, use theinstructions in Chapter 6, "Replacing a DPU in a Backup Pair" toextract the DPU. If the DPU to be serviced is configured standalone,place the keyswitch in the offline position and use the followinginstructions.

Gently slide the DPU module out of the cabinet rack and set the unitdown on an appropriate work surface, component side up.

2. Remove the top metal cover.

3. Locate the battery. It is on the top side of the Control Processor boardnear the DB25 connector.

4. Carefully remove the battery by pulling it straight up. Do not use anymetal tools since they could short the battery leads. Additionally, do

DPU Battery and Fuse Maintenance


not place any pressure on the circuits near the battery.

5. Install the battery into the same connector from which the old batterywas removed (B1). Make sure that the (+) lead, the center of thebattery, plugs into the end pin of the connector marked with the (+) onthe board. The second lead (-) should go into the fourth pin onconnector B1.

6. Install the metal cover.

7. Install the DPU in the chassis using the appropriate procedure foundin Chapter 6," Starting a Standalone DPU," or "Replacing a DPU in aBackup Pair."

Replacing DPU FusesThe DPU has two fuses, located on the motherboard, marked F1 and F2.Both fuses are subminiatures (resemble resistors). Fuse F1, 3A (Part number014257), is used for external battery power. Fuse 2, 3A (Part number014257), is used for 24V power. They are both mounted directly to the boardby their leads and plugged into sockets.

To change the fuses, follow the same procedure for changing the lithiumbattery, as described in the previous section, locate and replace the fuses.


Chapter 5

Backing up the DPU

OverviewIn a redundant configuration, two DPUs are connected to form a backup pair.One DPU is designated as the primary unit and the other DPU the secondaryunit. The DPU Bus station address of the secondary station is one numbergreater than the address of the primary station.

The installation, preparation, and adjustment procedures included in thispublication apply to both DPUs in a redundant configuration. This chapterprovides information on switches and cabling in a redundant configuration.

Automatic Failover/Manual TakeoverProcess control can be transferred automatically (Failover), or you canmanually command takeover. Automatic Failover can only occur from theprimary DPU to the secondary DPU; a secondary DPU will never auto-matically failover to a primary unless the secondary loses power or is reset.

Automatic FailoverProcess control is automatically transferred from the primary DPU to thesecondary DPU when the primary DPU experiences a severe diagnosticalarm or when communication between primary and secondary DPU is lost.However, if the secondary DPU is itself experiencing a severe diagnosticalarm, it will refuse control, unless the primary DPU loses power or is reset.

After the alarm condition in the primary DPU is rectified, acknowledge allremote alarms, confirm configuration using Interaction Page 9, and press thetakeover button on the front panel of the primary DPU to return control.

Manual TakeoverTo manually command either DPU to assume control, press the takeoverbutton on the front panel of the unit. Manual takeover will occur even if asevere diagnostic alarm or a fatal alarm condition exists in the DPU whosebutton is pressed.



If you manually transfer to primary while the primary has a severe diagnosticalarm, automatic failover may cause control to transfer back to the secondarywhen you release the Takeover button, as described above.

Cable DisconnectThe backup serial link cable (Part number 081387) carries data signalsbetween the primary and secondary DPUs, as well as a status signal whichdetermines which DPU is active. If one end of this cable is removed fromeither DPU, that unit is rendered inactive.

If a DPU is not part of a backup pair, a terminator (Part number 081388)must be inserted in place of the cable.


Chapter 6

Starting the DPU

Startup StatesRefer to this chapter to learn how to:

• Start a standalone DPU

• Start DPUs in a backup pair

• Replace a DPU in a backup pair

When a DPU is restarted, it senses the type of initialization being performedand starts in one of the following two modes:

Cold A Cold initialization occurs following a power outage if noconfiguration information is available from before the outage.This can occur if no battery power is available when the DPU ispowered down, or if a Cold start is demanded through the frontpanel mode switches. Following a Cold start, the DPU will remainin Offline state until it is manually placed online. Refer to"Demanding a Cold Startup."

Cool A Cool initialization occurs if configuration data is available inflash memory, unless a Cold start is demanded through the frontpanel mode switches. Following a Cool start, the DPU willautomatically progress to Online state unless its keyswitch is inthe Offline position.

In both modes, the DPU uses the time and date preserved in its CMOS clock,then synchronizes with other stations on the DPU Bus. If the CMOS clock isnot valid, the DPU will raise an alarm and remain Offline until it receivestime via the DPU Bus.

When the DPU is reset or the 24 Vdc power to the DPU is interrupted, EventQueue information is lost, but the internal battery allows the configuration tobe preserved in flash memory. When the DPU restarts, it reloads itsconfiguration and erases the flash memory to prevent the possibility of laterreloading an out of date configuration.



Demanding a Cold StartupWhen a DPU is first placed in service, or when a DPU is moved from onelocation to another, it is advisable to clear any previous configuration datathat may remain in its flash memory. To do this, before applying power tothe DPU, set front panel mode switches 1, 2, and 8 to the left, and modeswitch 4 to the right. After the DPU has gone through its startup sequence asdescribed in "Starting a Standalone DPU," be sure to set mode switch 4 backto the left to prevent future Cold startups.

Starting a Standalone DPUPerform the following steps to ensure that a DPU is completely configuredbefore it is allowed to assume control. It is important that the DPU not beplaced in the Online state until it has been fully configured.

To start a standalone DPU:

1. Turn the DPU keylock to the Offline position (fully counter-clockwise).

2. Insert a terminator (Part number 081388) in the backup link connector.

3. On the backup DIP switch at the bottom of the DPU, set the top mostswitch to the right (primary).

4. Set front panel mode switches 1, 2, and 8 to the left, and set mode switch4 to the right to demand a Cold startup, as described in the precedingsection.

5. Verify that the NiCd battery pack is installed and plugged correctly intoP10 connector on the motherboard. Additionally, verify that protectiveconnectors (Part number 081389) are installed in the IOM and CPU loadconnectors.

6. Set the proper DPU Bus address in the station number switches.

7. Position the module into the top and bottom card guides of the chassis.

8. Carefully slide the module forward, verifying that the connector pins onthe solder side of the module engage the corresponding contact guides onthe chassis assembly.

9. When the contacts are engaged and resistance is felt, firmly press on thefront panel of the module front plate to make the simultaneousconnections at the front and rear. Apply pressure to the left of the LEDsto place the force directly in line with the printed circuit card of themodule.

Starting the DPU


10. Secure module to chassis assembly with the top and bottom lock downscrews on the front of the module.

11. Before it begins DPU Bus communications, the DPU will initiallydisplay FF as its front panel LEDs, progress through a series of stepscounting down from 0F to 06. Once it begins communicating, a healthyDPU will display a rapidly flickering number whose value ispredominantly 07.

12. Return mode switch 4 to the left.

13. Reload the DPU using maxTOOLS at a maxSTATION or theDump/Reload mode at the Operator Station.

14. Acknowledge all alarms from the DPU and make sure that they all clear.

15. Display Interaction Page 9 of the DPU at a maxSTATION. Locate theBackup? Field and type n for no; locate the Startup? Field and type yfor yes.

16. Place the keyswitch in the Run or Locked mode.

Starting a Backup Pair of DPUsWhen starting a backup pair of DPUs, you must bring the primary DPU upfirst and make sure it is running properly before starting the secondary.Perform the following steps to ensure that an unexpected failover does notoccur during the startup process.

To start DPU backup pairs:

1. Turn both DPU keylocks to the Offline position (fullycounter-clockwise).

2. Set the top most backup DIP switch appropriately for each DPU (tothe right for primary, to the left for secondary).

3. Set the remaining backup switches (shared/separate I/O) appropriatelyas described in Chapter 2,"Backup DIP Switch Settings"; make surethe corresponding switch positions match in each DPU.

4. On each DPU, set front panel mode switches 1, 2, and 8 to the left; setmode switch 4 to the right to demand Cold startups from each unit.

5. Verify that the NiCd battery pack is installed and plugged correctlyinto P10 connector on the motherboard. Additionally, verify thatprotective connectors (Part number 081389) are installed in the IOM



and CPU load connectors.

6. Set the proper DPU Bus address in the station number switches.

7. Position each DPU into the top and bottom card guides of eachchassis, but DO NOT push them in far enough to apply power to theunits.

8. Connect a backup cable (Part number 081387) between the units. Notethat the cable ends are keyed so that they can only be inserted oneway.

9. For the primary, carefully slide the module forward, verifying that theconnector pins on the solder side of the module engage thecorresponding contact guides on the chassis assembly.

10. When the contacts are engaged and resistance is felt, firmly press onthe front panel of the module front plate to make the simultaneousconnections at the front and rear. Apply pressure to the left of theLEDs to place the force directly in line with the printed circuit card ofthe module.


12. Before it begins DPU Bus communications, the DPU will initiallydisplay FF as its front panel LEDs, progress through a series of stepscounting down from 0F to 06. Once it begins communicating, ahealthy DPU will display a rapidly flickering number whose value ispredominantly 07.


14. Reload the primary DPU using maxTOOLS at a maxSTATION or theDump/Reload mode at an Operator Station.

15. Acknowledge all alarms from the primary DPU.

16. Display Interaction Page 9 of the DPU at a maxSTATION or OperatorStation. Locate the Backup? Field and type y for yes; locate theStartup? Field and type y for yes.

17. Place the keyswitch of the primary DPU in the Run or Locked mode.

18. Insert the secondary card using the same steps as the primary.

19. Make sure the secondary starts up and begins communicating on theDPU Bus as described above.


Starting the DPU


21. Reload the secondary DPU using maxTOOLS at a maxSTATION orthe Dump/Reload mode at an Operator Station.

22. Acknowledge all alarms from the DPU pair and make sure thatsecondary alarms are all clear.

23. Display Interaction Page 9 of the DPU at a maxSTATION or OperatorStation. Locate the Backup? Field and type y for yes; locate theStartup? Field and type y for yes.

24. Make sure that the primary DPU is displaying the alarm Backup LinkTimeout to make sure there are no higher priority alarms.

25. Place the keyswitch of the secondary DPU in the Run or Lockedmode.

26. Acknowledge all DPU alarms and make sure they all clear.

Replacing a DPU in a Backup PairWhen replacing a DPU in a backup pair, it is necessary to prevent the newunit from gaining control until it is properly configured and up to date.Perform the following steps to ensure that an unexpected failover does notoccur during the replacement process.

To replace a DPU in a backup pair:

1. Make sure there are no severe outstanding alarms from the DPUwhich is to remain in service, then press its Takeover switch.

2. Turn the keylock of the DPU being replaced to the Offline position(fully counter-clockwise).

3. Without disconnecting any cables, pull the DPU being replaced farenough out of its chassis to disconnect power, then wait until all itsLEDs have turned off; this may require up to 30 seconds.

4. Disconnect the backup cable from the DPU being replaced; DO NOTdisconnect the other end of the cable from the DPU which is toremain.

5. On the new DPU, verify that the NiCd battery pack is installed andplugged correctly into P10 connector on the motherboard.Additionally, verify that protective connectors (Part number 081389)are installed in the IOM and CPU load connectors.

6. Replace the DPU with the new unit, position the new DPU into thetop and bottom card guides of the chassis, but DO NOT push the new



unit in far enough to apply power to it.

7. Set the backup DIP switches on the new DPU to match the unit whichwas removed.

8. Set the station number rotary switches to match the unit that wasremoved.

9. Set front panel mode switches 1, 2, and 8 to the left, and set modeswitch 4 to the right to demand a Cold startup.

10. Connect the backup cable to the new DPU. Note that the cable end iskeyed so that it can only be inserted one way.

11. Carefully slide the module forward, verifying that the connector pinson the solder side of the module engage the corresponding contactguides on the chassis assembly.

12. When the contacts are engaged and resistance is felt, firmly press onthe front panel of the module front plate to make the simultaneousconnections at the front and rear. Apply pressure to the left of theLEDs to place the force directly in line with the printed circuit card ofthe module.


14. Before it begins DPU Bus communications, the DPU will initiallydisplay FF as its front panel LEDs, progress through a series of stepscounting down from 0F to 06. Once it begins communicating, ahealthy DPU will display a rapidly flickering number whose value ispredominantly 07.


16. Reload the new DPU using maxTOOLS at a maxSTATION or theDump/Reload mode at an Operator Station.

17. Acknowledge all alarms from the new DPU.

18. Display Interaction Page 9 of the new DPU at a maxSTATION orOperator Station. Locate the Backup? Field and type y for yes; locatethe Startup? Field and type y for yes.

19. If the new DPU is the primary of the pair, make sure the secondary isdisplaying the alarm DPU Pair is Running on Secondary. If the DPUbeing replaced is the secondary, make sure the primary is displayingthe alarm Backup Link Timeout. This is done to make sure that thereare no higher priority alarms.

Starting the DPU


20. Place the keyswitch of the new DPU in the Run or Locked mode.

21. If the new DPU is the primary of the pair, wait at least 10 seconds toallow its database to be updated, then press its Takeover button to giveit control.

22. Acknowledge all DPU alarms and make sure they all clear.

23. If the DPU is to be shipped or put in storage, unplug the NiCd batterypack from the P10 connector.


Chapter 7

Using Interaction Pages

Accessing DisplaysYou may access Interaction Page displays 9 through 13 from themaxSTATION to view information and data specifically related to the DPU.These specific Interaction Pages are covered in this chapter in some detail.

To access an Interaction Page display:

1. Bring up the maxVUE Runtime main menu.

2. Click the System Status button on the standard Vertical Toolbar toopen the System Status display.

3. Click the Int Page button appearing on the Horizontal Toolbar.

Using Interaction Page 9 Display with a WorkstationUse Interaction Page 9 to display the DPU configuration data sent by aWork-Station. Refer to Figure 7-1.

StartupThe Startup? prompt appears when manual intervention is required,following a cold startup or fatal alarm. For example, an I/O module fails andis not configured as an alarm-only module.

Backup OptionDPUs can be paired in a redundant configuration as described in Chapter 5.To configure the backup option, enter Y in the Backup field.



Digital Input Filter Time FieldDigital Input Filter time is in milliseconds; the default is 10 milliseconds.This digital filter can be used in place of, or with, the jumper enabledhardware lag filter on the Model IOP DI modules.

Serial Ports FieldYou may connect asynchronous serial devices to serial ports 1 and 2. Theprotocols and parameters for these devices are configured here. Foradditional information about serial links, refer to Publication 277574, DPUEmbedded Serial Links User's Guide.

Lockout and Log Options FieldIn the Lock position, you may disallow certain data DPU Bus operationsfrom MIS, HOST, REloads, or Screen Edits.

DPU Configuration Page Revision Date 14/OC/96Level Time 09:32:12

MODE Run Active DHW 5.0 Model 530 ConfigurationBackup N CP 5.0 Stat Page

IOM 5.0

DIGITALFILTER TIME10 MSEC

SERIAL I/O PORTS

Port Baud Link Type Bits/Char Stop Parity XON/OFF RTS/CTSNo Rate (0-255) (5,6,7,8) (1,2) (O,E,N) IN OUT IN OUT

J6 9600 25 MODB 8 1 O N N N NJ7 9600 214 Umax 8 2 N N N N N

LOCK OUT ACTIONS MIS N HOST? RELOAD? SCREENS? NLOG EDIT ACTIONS MIS N HOST? RELOAD? SCREENS? N

Figure 7-1. Interaction Page 9 Display with Sample Configuration.

Using Interaction Page 9 Display with an Operator StationUse Interaction Page 9 to configure the DPU if a Model 585 OperatorStation is being used instead of a maxSTATION. Refer to Figure 7-2.



Before you can edit configuration data on Interaction Page 9, you must placethe DPU in offline mode. While you may make entries on this page only inOffline mode, they do not take effect until either Run or Locked mode isentered.

Any questionable entries on this page are automatically highlighted in red.For example, you entered a Z instead of an I or O for a DIO module. TheInteraction Page 9 section title, where the questionable entry was made, alsobecomes highlighted.

HWY 1 STA 33 INTERACTION PAGE 9

DPU Configuration Page Revision Date 14/OC/96Level Time 09:32:12

MODE Run Active DHW 5.0 Model 585 ConfigurationBackup? N CP 5.0 Stat Page 10

IOM 5.0

DIO Inventory I = Input, O = Output, A = Alarm Only1 9 17 252 10 18 26 Digital3 11 19 27 Filter Time4 12 20 28 10 msec5 13 21 296 14 22 307 15 23 318 16 24

AI Inventory Address Alarm Channels Linearizationby 16 Only 1-15

QUAD1 ( 1-15) AI PAGE 14 14QUAD2 (16-30) 15 15QUAD3 (33-47) DATA PT 14 14QUAD4 (48-62) 15 15

Redundant I/O Address Ranges (R = Redundant, C = Common)

0 16 32 48 64 80 96 112 128 144 160 176 192 208 224C C C C C C C C C C C C C C C

SERIAL I/O PORTS

Port Baud Link Type Bits/Char Stop Parity XON/OFF RTS/CTSNo Rate (0-255) (5,6,7,8) (1,2) (O,E,N) IN OUT IN OUT

J6 9600 25 MODB 8 1 O N N N NJ7 9600 214 Umax 8 2 N N N N N

LOCK OUT ACTIONS MIS? N HOST? RELOAD? SCREENS? NLOG EDIT ACTIONS MIS? N HOST? RELOAD? SCREENS? N

Figure 7-2. Interaction Page 9, Operator Station Version.

The DPU will not become active until Interaction Page 9 is completelyconfigured and the keylock switch is in the Run or Locked position.



The following sections describe the expected entries and automatic defaultson Interaction Page 9.

StartupThe startup? prompt appears when manual intervention is requiredfollowing a cold startup or fatal alarm. (For example, an I/O module failsand is not configured as an alarm-only module.) After Interaction Page 9 isreviewed and configured, enter Y in the entry field to place the DPU intooperation. Ensure that the keyswitch is in the Online (Run or Locked)position.

Backup Option FieldDPUs can be paired in a redundant configuration as described in Chapter 5.To configure the backup option, enter Y in the Backup field.

Stat Page FieldThis field determines what is shown on Interaction Page 8. The default forthis field, 10, places the I/O status and event queue display on page 8.During configuration this field may be changed to 11, DPU Serial LinksStatus; 12, DPU Bus Performance Statistics; or 13, High Speed Digital I/OTabular Display.

DIO Inventory FieldThe Digital Input/Output (DIO) Inventory can accept 30 entries in the ranges1 to 15 and 17 to 31.

Enter I or O to indicate input/output modules.

Examples: 1 I

2 O

Append an A to indicate that loss or failure of one or more of these modulesis not a fatal alarm, as would be the default. (Any fatal alarm forces the DPUto Offline mode.)

Examples: 1 I

2 O

3 IA

4 OA



The default is all blank fields. When no module at a given address is desired,enter blanks at that location. Note that DIO modules need not be atconsecutive addresses.

For Fast Digital Inputs, a maximum of 25 digital input boards can be used.

Digital Input Filter Time FieldDigital Input filter time is in milliseconds; the default is 10 milliseconds.This digital filter can be used in place of, or with, the jumper enabledhardware lag filter on the Model IOP DI modules.

Analog Input Inventory FieldThe Analog Input (AI) Inventory field on Interaction Page 9 contains threecolumns. Each column can accept four entries.

The first column is for the four potential high-level Al modules needed to fillthe Analog (Process) Inputs Page. Enter the base module number (divisibleby 16, and greater than or equal to 32).

The second column is for As to specify alarm only.

Use the third column to specify the number of channels to be scanned of the15 possible channels. This field is used when Quad PAT output modules areused. For example, if two PAT output modules, with addresses of 48 and 62,are used, quad one could be configured for address 48, with eight channelsscanned. Defaults are all blank fields.

Redundant I/O Address Ranges FieldWhen the Y adapter is used for a combined shared and redundant I/O bus,ranges of modules must be specified as either redundant (R), common (C), orblank if no modules reside in the specified range. For example, address 16represents address ranges 16 through 31.

Lockout and Log Options FieldIn the Lock position, you may disallow certain DPU Bus operations fromMIS, HOST, REloads, or Screen Edits.

Serial Ports FieldYou may connect asynchronous serial devices to serial ports 1 and 2. Theprotocols and parameters for these devices are configured here. Foradditional information about serial links, refer to Publication 277574, DPUEmbedded Serial Links User's Guide.



Interaction Page 10The I/O Module Status display shows all possible addresses on the I/O bus.The status of each address (active, standby, communication problem or nomodule) is highlighted in either green, yellow, red or black.

I/O MODULE STATUS

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1516 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3132 33 34 35 36 37 38 39 40 41 42 43 44 45 46 4748 49 50 51 52 53 54 55 56 57 58 59 60 61 62 6364 65 66 67 68 69 70 71 72 73 74 75 76 77 78 7980 81 82 83 84 85 86 87 88 89 90 91 92 93 94 9596 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255Last Bad Module =

EVENT QUEUE POINTERS

PUT 8489F4 20 08 820230 00 16 820230 00 24 820230 0001 820230 00 09 820230 00 17 820230 00 25 820230 0002 820230 00 10 820230 00 18 820230 00 26 820230 0003 820230 00 11 820230 00 19 820230 00 27 820230 0004 820230 00 12 820230 00 20 820230 00 28 820230 0005 820230 00 13 820230 00 21 820230 00 29 820230 0006 820230 00 14 820230 00 22 820230 00 30 820230 0007 820230 00 15 820230 00 23 820230 00 31 820230 00

Figure 7-3. Interaction Page 10, I/O Module Status and Event Queue Pointers.

Green (Model IOP I/O) or blue (Field I/O) highlighting indicates that an I/Omodule is present at that address and there are no communication problemswith the module. In a redundant I/O backup configuration, the moduleaddress can assume this color in both the active and inactive DPUs.

Yellow highlighting indicates that the system is set up for shared I/O (twoDPUs with a common I/O string) and a module is present at that address.The module address is highlighted in yellow for the inactive DPU and willchange to green when the DPU assumes control.

Red highlighting indicates that some process (Data Blocks, Process Inputs,Control Blocks, or ExCEL) is trying to access a module at that address buteither no module is present or the module has a communication problem. Ifthe communication problem is intermittent, the address will only be red for 4



seconds after the last unsuccessful scan. In the case where only ExCEL istrying to access the module, ExCEL must access the module frequentlyenough for the error to persist.

SERIAL PORT J6 ExCEL

OK TRANSACTIONS 0 BUFFER OVERRUNS 0CHECKSUM ERRORS 0

NO. OF DATA BLOCKS 0 FAILED TO SENDS 0NO. OF MESSAGES/SCAN 0 LINK LEVEL ERRORS 0LINK SCAN TIME (MS) 0 RETRIES 0

TIMEOUTS 0INPUT QUEUE 0 UNEXPECTED CHARACTERS 0OUTPUT QUEUE 0 LAST NAK CODE 0

SERIAL PORT J7 ExCEL

OK TRANSACTIONS 0 BUFFER OVERRUNS 0CHECKSUM ERRORS 0

NO. OF DATA BLOCKS 0 FAILED TO SENDS 0NO. OF MESSAGES/SCAN 0 LINK LEVEL ERRORS 0LINK SCAN TIME (MS) 0 RETRIES 0

TIMEOUTS 0INPUT QUEUE 0 UNEXPECTED CHARACTERS 0OUTPUT QUEUE 0 LAST NAK CODE 0

Figure 7-4. Interaction Page 11, Serial Port Status Display.

Black highlighting indicates that no I/O module is present and no process isattempting to access that address. Note that if two modules are present at thesame address, the DPU will not be able to communicate with either moduleand the display will indicate that no module is present.

The Last Bad Module statistic field displays the address and time of the mostrecent unsuccessful I/O scan.

Event Queue Pointer InformationInteraction page 10 also contains Event Queue pointer information. TheEvent Queue is an internal DPU buffer used to store events such as Sequenceof Events entries, process alarms, remote diagnostic alarms, time updates,and operator edit actions. The Event Queue pointer table shows the memoryaddress (in hex) of the last event placed in the queue by the DPU (i.e., PUTXXXXXX YY), and the memory location of the last event removed from thequeue by each of the 31 possible high traffic loop stations during normaloperation (e.g., 01 XXXXXX YY). The last two digits in the field indicatehow many times the queue has wrapped around.



Since the events are constantly being removed from the queue and processedby the stations on each scan, the addresses for active dequeueing stations(maxSTATIONs and Operator Stations) should be close to the address of theDPU PUT pointer.

HIGHWAY PERFORMANCE STATISTICS

STATION = 36 TIME MASTER ADDRESS 36LAST SENDER OF BAD DATA 0TIME SYNC MSGS IGNORED 0

TOKEN PASSES PER SECOND= 2 COMMAND RESPONSEREJECTS

9

MASTERSHIPS RECEIVED = 26273 LAST REJECTED STATION 30STATUS BROADCASTS = 65 LAST REJECTED QUERY 25TOTAL Q/R TRANSACTIONS = 1815 LAST REJECTED PTID TYPE FFRECEIVED FRAMES WITH ERROR 101 LAST REJECTED PTID INDEX FFUNFINISHED TRANSMIT QUERIES 0 LAST REJECTED ITEM FF

LINK REJECTS 0CRC ERRORS = 2304 READ SINGLE ITEM 152STALLOUT RECOVERIES = 0 WRITE SINGLE ITEM 181OVERRUN ERRORS = 9 READ MULT ITEMS IEEE 2RECEIVE FRAME LENGTH ERRORS= 0 WRITE MULT ITEMS IEEE 243ABORTS RECEIVED = 0 READ THESE ITEMS 34ABORTS TRANSMITTED = 0 READ SINGLE ITEM/STS 39CTS LOST = 0 WRITE THESE ITEMS IEEE 0DCD LOST = 90 READ THESE ITEMS/QUALITY 0CTS NOT ACTIVE = 0 OLD SCAN TABLE MESSAGES 0DCD ACTIVE AT TX TIME = 2 NEW SCAN TABLE MESSAGES 40MESSAGE RETRIES = 160UNEXPLAINED ERRORS = 0

HEX MEMORY DUMP 000000TOTAL DHW DIAGNOSTIC ALARMS= 0CW OPTICAL CABLE CHANGES = 0 D7 01 F4 IF F8 FF 2E 94CCW OPTICAL CABLE CHANGES= 0 77 04 00 50 00 00 00 00CW ELECTRICAL CABLE CHANGES 0CCW ELECTRICAL CABLE CHANGES= 2PERMANENT NEXT STATION ADDRESS = 48

Figure 7-5. Interaction Page 12, Highway Performance Statistics Page.

Interaction Page 11Interaction page 11 contains serial link statistics for PLC links and HCI linksthat may be connected to the serial ports of the DPU. Refer to Figure 7-4.These statistics are cleared during any offline to online transition. Refer toPublication 277574, DPU Embedded Links User's Guide, for moreinformation about these statistics. Refer to the following table for adescription of HCI link files.

OK TRANSACTIONS Count of successful query/responsetransactions between the PC and DPU.

BUFFER OVERRUNS Count of messages received from PCthat were too long to be valid.



CHECKSUM ERRORS Count of queries received withchecksum errors from PC.

FAILED TO SENDS Count of nonimmediate queriesattempted to be sent.

UNEXPECTED CHARACTERS Count of unexpected charactersreceived from the PC.

All other statistics for HCI link are not valid.

Interaction Page 12Interaction Page 12 contains the DPU Bus performance statistics displayshow-ing the diagnostic counters for the network. The statistics arecumulative from the last RZAP command, which is initiated from theHighway Status display on the maxSTATION. Refer to Figure 7-5,Interaction Page 12, Highway Performance Statistics Page. Refer toPublication 277581 for descriptions of each field appearing on the left sideof the display.

The following table describes the right column statistics appearing inInteraction Page 12:

COMMAND RESPONSEREJECTs

Count of the Immediate queries sent tothis station that were rejected.

LAST REJECTED STATION Highway address (in decimal) of the laststation that issued an Immediate querythat was rejected.

LAST REJECTED QUERY Immediate query type (in decimal) of thelast Immediate query that was rejected.

LAST REJECTED PTID TYPE PTID type field (in hex) of the lastdatabase access failure. If the rejectedquery above does not use a PTID thetype displayed will be FF.

LAST REJECTED PTID index PTID slot/channel field (in hex) of thelast database access failure. If therejected query above does not use aPTID the index displayed will be FF.

LAST REJECTED ITEM Item number (in hex) of the last databaseaccess failure. If the rejected queryabove does not use an item number field



the item displayed will be FF.

READ SINGLE ITEM Count of read single item queriesprocessed by this DPU since reset.

WRITE SINGLE ITEM Count of write single item and writesingle item IEEE queries processed bythis DPU since reset.

READ MULT ITEMS IEEE Count of read multiple items queriesprocessed by this DPU since reset.

WRITE MULT ITEMS IEEE Count of write multiple items queriesprocessed by this DPU since reset.

READ THESE ITEMS Count of read these items and read theseitems IEEE queries processed by thisDPU since reset.

READ SINGLE ITEM/STS Count of read single with status queriesprocessed by this DPU since reset. Theread single item with status query isnormally issued by other DPUs andModel 552 controllers to performControl Block and Data Block Receives.

Interaction Page 13Interaction Page 13 contains the DIO tabular display; the fields are describedbelow:

Table 7-1. DIO Tabular Display.

TB01-TB32 Logical name of Fast DIO board 1-32.

T/F Bit value: T = true = 1, F = False = 0.

For each bit in automatic mode, its state (T/F) is shown ona yellow or green field background. For each bit inmanual mode, its state is shown on a black background.

I/O address Physical I/O bus address of TBxx. This value can be0-239 (0 = phantom).

Module type DIO I/O module type input (IN) or output (OUT).



For modules configured to only alarm on failure, the type (IN or OUT) willbe in black on a yellow or green field background. If the module isconfigured for a fatal error on failure (DPU goes offline), the type will beshown in yellow or green on a black field background.

DIGITAL TABULAR DISPLAYMODULE I/OTYPE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ADDRESS

TBOL IN F F F F F F F F F F F F F F F F TBOI 1TBO2 OUT F F F F F F F F F F F F F F F F TBO2 2TBO3 F F F F F F F F F F F F F F F F TBO3 0TBO4 OUT F F F F F F F F F F F F F F F F TBO4 4TBO5 F F F F F F F F F F F F F F F F TBO5 0TBO6 F F F F F F F F F F F F F F F F TBO6 0TBO7 F F F F F F F F F F F F F F F F TBO7 0TBO8 F F F F F F F F F F F F F F F F TBO8 0TBO9 F F F F F F F F F F F F F F F F TBO9 0TBLO F F F F F F F F F F F F F F F F TBIO 0TBLI F F F F F F F F F F F F F F F F TBll 0TB12 F F F F F F F F F F F F F F F F TB12 0TB13 F F F F F F F F F F F F F F F F TB13 0TB14 F F F F F F F F F F F F F F F F TB14 0TB15 F F F F F F F F F F F F F F F F TB15 0TB16 F F F F F F F F F F F F F F F F TBI6 0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16TB17 F F F F F F F F F F F F F F F F F TBI7 0TB18 F F F F F F F F F F F F F F F F F TB18 0TB19 F F F F F F F F F F F F F F F F F TB19 0TB20 F F F F F F F F F F F F F F F F F TB20 0TB21 F F F F F F F F F F F F F F F F F TB21 0TB22 F F F F F F F F F F F F F F F F F TB22 0TB23 F F F F F F F F F F F F F F F F F TB23 0TB24 F F F F F F F F F F F F F F F F F TB24 0TB25 F F F F F F F F F F F F F F F F F TB25 0TB26 F F F F F F F F F F F F F F F F F TB26 0TB27 F F F F F F F F F F F F F F F F F TB27 0TB28 F F F F F F F F F F F F F F F F F TB28 0TB29 F F F F F F F F F F F F F F F F F TB29 0TB30 F F F F F F F F F F F F F F F F F TB30 0TB31 F F F F F F F F F F F F F F F F F TB31 0TB32 F F F F F F F F F F F F F F F F F TB32 0

Figure 7-6. Interaction Page 13, Digital Tabular Display.


Chapter 8

Alarms and Diagnostics

Annunciation of AlarmsDiagnostic alarms originating at a DPU are posted as remote alarms on themaxSTATION Alarm List. Refer to Publication 277558, Alarm MessageReference Guide, for a description of these alarms. DPU front panel LEDsalso indicate certain fatal diagnostic alarms.

Front Panel Numeric LEDsDuring normal operation, the numeric LEDs reflect the activity of the DPUBus Card). If a DPU is reset, it initially displays 88; during its restart cycle, itdisplays FF, progresses through a series of steps counting down from 0F to06, then goes online. Once online, a healthy DPU typically displays a rapidlyflickering number whose value is predominantly 07. If a DPU isdisconnected from the data DPU Bus, it displays a steady value of 07.

If a DPU has a failure which prevents the DPU Bus Card from workingproperly, the DPU will drop off the data DPU Bus. Front panel LEDs willthen be used to display two diagnostic codes alternating every 1.5 seconds,one reflecting the condition detected by the DPU Bus Card, and the otherreflecting the highest priority alarm reported by any of the processors. TheDPU Bus Card reports the following detected conditions:

DA The DPU Bus address set on the front-panel rotary switches isillegal (e.g., 00).

DC Jabberhalt timeout; the DPU Bus Card transmitted on the DPU Bustoo long.

DF The DPU Bus Card either detected a stack imbalance or executedan illegal instruction.

The alarm code alternating with one of the above DPU Bus Card codes maybe any of the alarm codes listed in the Alarm Message Reference Guide. Inmost cases, the two codes are independent; in a few special cases, one maybe the cause of the other. The most likely of those special cases is DC(jabberhalt) combined with one of the following:



F0 The DPU Bus Card waited for a response from the ControlProcessor (CP) which was never received, and the CP reported noother fatal alarm condition.

FD The DPU Bus Card waited for a response from the CP which wasnever received because the CP determined that its program codehad been corrupted (checksum error).

FE The DPU Bus Card waited for a response from the CP which wasnever received because the CP re-executed its startup codeunexpectedly (jump or return to address 0).

MAX DNA DPU_a1

Documents

mounting procedures

model pdp dpuinstallation

dip switch settings

rotary switches

station address

accurate information

data highway area

led displays