C33129_20-DIU19A

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CU 24021

Page I (I)Operating Handbook

DATA UNIT 0...19.2 kbaud; asyn. V.28, 8 ch.

9.12.88 SHA 9.12.88 SHaH. TersrantaPrepared by Checked Approved Number

NTC/TS

(DM2DU-0279-PEA1)C33129001PE_00

CU 24021

DATA UNIT 0...19.2 kbaud; asyn. V.28, 8 channels

Operating Handbook

Version A1

(ND 02J022)C33129.20

Contents

1 FUNCTIONAL DESCRIPTION DM2DU-0287-SEA1

2 INSTALLATION DM2DU-0202-SEA1

3 OPERATION DM2DU-0278-SEA1

4 OPERATION WITH SERVICETERMINAL DM2DU-0250-SEA1

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DATA UNIT 0...19.2 kbaud, asyn., V.28., 8 chan CU 24021

Page 11.9.1988

Functional DescriptionII/1

Prepared by Checked Approved NumberS. Haapakoski/kk DM2DU-0287-SEA1

CU 24021

DATA UNIT 0...19.2 kbaud, asyn., V.28, 8 chan.

Functional description

Contents

Page

1 GENERAL 3

2 MECHANICAL CONSTRUCTION 3

3 OPERATION 6

3.1 Sampling 73.2 Transition coding 7

4 LOOPBACKS 8

5 SETTINGS 9

6 TECHNICAL SPECIFICATIONS 9

6.1 Unit dimensions 96.2 Terminal equipment interface 106.3 Power consumption 10 (10)

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DM0057EA1

0...19.2 kbit/s

n x 8 kbit/s

V28

TTL

BUSINTER.

n x 8 kbit/s

V28

TTL

BUSINTER.

n x 8 kbit/s

V28

TTL

BUSINTER.

CH1: CODING

CH2: CODING

CH8: CODING

V28

TTL

TEST:

DATAINTERFACE

TxD1

RxD1

TxD2

RxD2

TxD8

RxD8

Monitor

CONTROL

CPU

RAM

EPROM

EEPROM+5 V +12 V -12 V

UA0UA1

UA3UA4

UA2

Unit

Control

20 - 72 V

Unit Address

2 Mbit/sBus:

RSYNR2MRDATTSYNT2MTDAT

DU 19.2 A

MONITORING

0...19.2 kbit/s

0...19.2 kbit/s

Figure 1 Data Unit CU 24021 block diagram

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3 OPERATION

Thedata unit enables thegeneration of several independentdata transferchannels and data transfer networks into the frame structure of DYNACARD multiplexers.

When data is transferred in the 2 Mbit/s frame format, the possible transfer methods are direct sampling, sampling and filtering, data coding andframing methods, and combinations of these.

The methods used in Data Unit CU 24021 are direct sampling, samplingand filtering, and transition coding, see Table 1 .

Operatingmode

Data-rate bit/s

Transferrate

Bit reservation/ time slot

Sampling 0... 600 8 kbit/s 1120024004800

16 kbit/s32 kbit/s64 kbit/s

248

Sampling&

0... 600 8 kbit/s 112002400

4800

16 kbit/s32 kbit/s

64 kbit/s

24

8

Transition 0...2400 8 kbit/s 148009600

19200

16 kbit/s32 kbit/s64 kbit/s

248

...

...

...

...

...

...

...

......

filtering

coding

*)

*) maximum momentary distortion < 10 %

Table 1 Data transfer methods in Data Unit CU 24021

3.1 Sampling

In sampling, samples are taken from the signal to be transmitted in phase with the transfer rate and they are transferred into the 2 Mbit/s framestructure. In reception the samples are picked from the frame structureand transferred to the terminal equipment at standard rate.

To improve the bit error ratio, a digital filter can be used in the receivingdirection to remove all one and two-bit error bursts from the transmission channel (digital low-pass filtering of third grade).

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3.2 Transition coding

Transition coding complies with the CCITT Recommendation R.111. Intransitioncoding, the signal to be transmitted is sampled at four times thetransfer rate of the channel in the 2 Mbit/s frame.

Changeinthesignaltobetransmittedcausesthetransmissionofathree-bit codeword ( Figure 3 ). The first bit of the code word, bit T, indicates thedirection ofthe signalchange. NextbitsC1and C2indicatethe momentof change. The polarity bit P following the code word indicates the state of the signal to be transmitted.

DM0059EA1

0 1 0 1 1 1 0 0 1P T C C P P T C C

10

data signalsampling

channel bitsbit sequencebit symbol

code word code word

1 2 1 2

Direction of change Moment of change

1 0 0 1

T C1 C2 T C1 C2

0000

0

11

00101

1111

1100

1010

first quartersecond quarterthird quarterfourth quarter

moments

Figure 3 Transition coding

Data transfer channels are matched to the 2 Mbit/s frame structure bothin transmitting and receiving directions by means of 2 MHz clock signalsand frame alignment signals.

In transmitting direction the channel reserves for its use the desired bitlocations of the desired time slot in the transmitted frame structure(TDAT). The data bits to be transmitted are located into bit locationsaccording to reservations.

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In receivingdirection thechannel picks thedesired bits from the receivedframe structure (RDAT), decodes them and transfers them to the termi

nal equipment at standard rate.

4 LOOPBACKS

Data Unit CU 24021 generates a data transfer connection to the corresponding equipment configuration at the remote end via the 2 Mbit/sframe format of DYNACARD multiplexers. Possible channel-associated faulty condition in this transfer connection can be located bymeans of test loopbacks.

Figure 4 shows the channel-associated loopback facilities of the unit.Loopbacks are controlled by means of service terminal and maintenancesettings.

n x 8 kbit/s

V28

TTL

n x 8 kbit/s

V28

TTL

CH1: CODING

CH2: CODING

DATAINTERFACE

TxD1

RxD1

TxD2

RxD2

2 Mbit/sBus:

RSYNR2MRDAT

TSYNT2MTDAT

L1

L2

Channel 1 is looped back to the terminal equipment (L1)Channel 2 is looped back to the 2 Mbit/s frame (L2)

DM0060EA1

BUSINTER.

Figure 4 Channel-associated loopbacksBy combining the near end and remote end loopbacks and the internalloopbacksof theequipment, extensive testing ofthedata transferconnection can be realized.

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5 SETTINGS

Channel-associated settings of the unit are programmed by means of service terminal and are stored in the unit EEPROM.

Functional settings:

- selection of operating modesamplingtransition coding

- selection of data transfer rate

- selection of filteringdigital filteringno filtering

- selection of time slot

- reservation of bit locations in time slot.

Test and maintenance settings:

- control of maintenance LEDs

- channel-associated loopbackslooped back to terminal equipmentlooped back to 2 Mbit/s frame

- monitoringmonitoring of transmitted datamonitoring of received data

- internal tests of unitmonitoring of supply voltagesEEPROM testsRAM testsROM tests.

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6 TECHNICAL SPECIFICATIONS

6.1 Unit dimensions

Width 25 mm 5T

Depth 160 mm

Height 233 mm 6U

Weight approx. 0.3 kg

6.2 Terminal equipment interfaceThe electrical characteristics of the interface signals of the terminalequipment comply with the CCITT Recommendation v.28.

Input voltage 3... 25 V

Input impedance 3...7 kohm

Output voltage +12 V/-12 V

Output impedance 300 ohm

A short circuit between the terminal equipment interface signals does notdamage the unit. Highest possible short circuit current is 10 mA.

Distortion less than 10 % at all rates and with all coding methods (seeTable 1 ).

6.3 Power consumption

Battery voltage -20...-72 V

Power consumption/ battery voltage 1.5 W

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DATA UNIT 0...19.2 kbaud, asyn., V.28, 8 ch. CU 24021

Page 11.12.1988

InstallationII/2

Prepared by Checked Approved NumberS. Haapakoski/AS DM2DU-0202-SEA1

CU 24021

DATA UNIT 0...19.2 kbaud, asyn., V.28, 8 ch.

Installation

Contents

Page

1 CABLING 3

1.1 Unit CU 24021 41.2 Cabling examples 51.3 Marking card 7 (7)

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InstallationII/2

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InstallationII/2

1 CABLING

This descriptionpresents thecabling of theData Unit CU24021.Generalcabling instructionsand connection instructions forconnectors conforming to the TM4 Construction Practice are found in the Operating Hand

book for TM4 Construction Practice .

The pin numbering of the data unit front interfaces is presented in Figure1.

The cabling of the data unit interfaces can be either interface-associated, using a full-size Euroconnector or channel-associated,using a 1/4 Euroconnector (2 x 7).

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InstallationII/2

1.1 Unit CU 24021

channel symbol pin name

111

222

333

444

555

666

777

888

RxD1 2c30 Rx dataTxD1 2a31 Tx dataGND 2a25 Signal ground








4c08

D A T A I N T E R F A C E S I G N A L S

Signals RxD, TxD and GND correspond to the CCITTsignal numbering 104, 103 and 102.

DM0058EB1

a

31

23

15

7

1

TxD1

TxD2

TxD3

TxD4

GND

TxD5

TxD6

TxD7

TxD8

RxD1

RxD2

RxD3

RxD4

RxD5

RxD6

RxD7

RxD8

RED YELLOWGREEN

c

a

31

23

15

7

1

c

GND

GND

GND

Monitor

GND

GND

GND

GND TEST MONITOR Monitor data

Figure 1 Terminal equipment interfaces of Data Unit CU 24021

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InstallationII/2

1.2 Cabling examples

Example 1. INTERFACE-ASSOCIATED CABLING

channel symbol pin cable colour pin

111

222

333

444

555

666

7

77

888

RxD1 2c30 1TxD1 2a31GND 2a25






RxD7 4c14 3

TxD7 4a15GND 4a09


4

DM0105EA1

a

31

23

15

7

1

TxD1

TxD2

TxD3

TxD4

GND

TxD5

TxD6

TxD7

TxD8

RxD1

RxD2

RxD3

RxD4

RxD5

RxD6

RxD7

RxD8

RED

YELLOWGREEN

c

a

31

23

15

7

1

c

GND

GND

GND

Monitor

GND

GND

GND

GND TEST MONITOR 4

blu c30 wh a31 ye a25

ora c22 wh a23 ye a17

gr c14 wh a15 ye a09

br c06 wh a07 ye a01

blu c30 wh a31 ye a25

ora c22 wh a23 ye a17

gr c14

wh a15 ye a09

br c06 wh a07 ye a01

red c08

1

2

Cable MMMS 4 x 4 x 0.4 + 0.4 mmConnector EURO 2 x 32 F KO5415947Connector Shell KO5415231

Shield 9266710

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InstallationII/2

Example 2. CHANNEL-ASSOCIATED CABLING

channel symbol pin

111

222

333

444

555

666

777

888









4a09

DM0106EA1

a

31

23

15

7

1

TxD1

TxD2

TxD3

TxD4

GND

TxD5

TxD6

TxD7

TxD8

RxD1

RxD2

RxD3

RxD4

RxD5

RxD6

RxD7

RxD8

RED YELLOWGREEN

c

a

31

23

15

7

1

c

GND

GND

GND

Monitor

GND

GND

GND

GND TEST MONITOR

blu a06 wh c07bare c01








CableConnector EUROConnector Shell KO5415217

Shield KO5415224

KLVMAM 2 x 0.4 + 0.4 mm KO71303762 x 7 KO5414534

-

cable colour pin

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InstallationII/2

1.3 MARKING CARD

DM0131FA1

CH1

CH2

CH4

CH3

CH5

CH6

CH7

CH8

a c

RxD5RxD5+RxD5-

RxD8RxD8+RxD8-

TxD5TxD5+TxD5-

TxD8TxD8+TxD8-GND

GND

a cTxD

RxD

GND

a c

TxD RxDGND

a c

TxD+RxD+

V.28 Floating

Base Band/Current loop

GND

RxD-TxD-

V.28

Channel

interface type:

DIU-19.2 CU 24021Unit location:Equipm. ID:

Address:

Figure 2 Marking card of CU 24021

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OperationII/3

Prepared by Checked Approved NumberS. Haapakoski/AS DM2DU-0278-SEA1

CU 24021

DATA UNIT 0...19.2 kbaud, asyn., V.28, 8 ch.

Operation

Contents

Page

1 COMMISSIONING 3

1.1 Interfaces 31.2 Tests 31.3 Settings 3 (3)

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OperationII/3

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OperationII/3

1 COMMISSIONING

It is recommended that a new unit be commissioned as follows:- Insert the unit into the subrack. If the unitdoesnot belongto the unit

bus configuration, the red LED is lit.

- Deactivate the channels (TOP, 9, 9, u, 3).

- Perform the channel tests (TOP, 9, 9, u, 2). The test result is displayed.

- Program the settings.

- Add the unit to the unit bus configuration (TOP, 6, 2,..).

- Activate the channels required.

1.1 Interfaces

The unit is provided with eight interfaces for asynchronous data traffic.The interface signals are TxD, RxD and GND (103, 104, 102). The interface complies electrically with the Recommendation V.28. By means of additional modules other electrical interfaces can be implemented. Theadditional modules have separate type designations.

1.2 Tests

Before actual use, test settings can be performed on the unit by means of option (TOP, 9, 9, u, 1) and channel-associated tests via option (TOP, 9,9, u, 2). The channel-associated test checks all the rates and operatingmodes of a particular channel in the unit and displays the test result. Thetestcanbeperformedbeforeaddingtheunittotheunitbusconfiguration.

1.3 Settings

The settingsof the unit are programmed bymeans of the service interfaceof the main unit and the Service Terminal. There is a separate documentOperationwith Service Terminal dealing with theprogramming.Theprogramming of the settings can be carried out before adding the unit to theunit bus configuration. The unit is added to the configuration by option(TOP, 6, 2,..). After the unit has been added, make sure that there are nofaults in effect in the unit (TOP, 1).

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Dataunit 0...19.2 kbaud; asyn. V.28, 8 ch CU 24021

Page 11.12.1988

Operation with Service TerminalII/4

Prepared by Checked Approved NumberV. Haapakoski DM2DU-0250-SEA1

CU 24021

Dataunit 0...19.2 kbaud; asyn. V.28, 8 ch

Operation with Service Terminal

Contents

Page

1 SERVICE MENUS 3

2 USER INTERFACE, GENERAL 9

3 FAULTS SUPERVISED BY THE UNIT 10

4 DATA UNIT MENUS 11

4.1 Identifications 114.2 Controls 124.3 Settings 144.4 Channel configuration 174.5 Measurements 194.6 Statistics 204.7 Testing 20 (21)

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1 SERVICE MENUS

DIU 19A Identifications:3567

User manualHW unitProgram IDModify ID

Give .-version:0-99

Give version:3

7

characters

4 Identifications

IDENTIFICATIONS: 4,9,u,7

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Controls5

Forced data:0 Display

DIU 19 A Controls:0 Display Ctrls1 To normal state2 Interface controls3 Monitoring4 Forced indications

Monitoring control:Give channel number1...8

Interface controls:

0 Display

4 Forced data

1 TxD normal2 TxD = 03 TxD = 1

1 To normal state2 Loop to interface

Forced indications:0 Display

2 Forced red indic.3 Forced yellow indic.4 Forced no indic.

1 Normal indic.

2

4

3

4

CONTROLS: 5,9,u,2-4

3 Loop to eq. bus

Select:0 Display1 Monitoring Tx2 Monitoring Rx

n

Interface controls:Give channel number1...8

n

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6

DIU 19 A Settings:0 Display all1 Deact. all channels2 Channel configuration3 Copy channel5 Activate channel

Settings

6 Deactivate channel7 Control timeout8 Read/Save all

Copy channel parameters:From channel1...8

Copy channel parameters:To channel1...8

Channel Act./Deact.

Give channel number1...8

Control timeout:0 Display1...65000 min.

3

5,6

7

SETTINGS: 6,9,u,3-7

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6


Settings


Interface type:

Operating mode:

Give channel number

Channel configuration:0 Display1 Interface type3 Operating mode4 Bus configuration5 Activate channel6 Deactivate channel

0 Display1 V.28 interface2 Optional interface

0 Display1 Transition coding (TC)2 Sampling (S)3 Sampling + filtering (S&F)

1

3

1...8

2

SETTINGS: 6,9,u,2,n,1-3

1...8

n

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Bus configuration:0 Display1 TS allocation5 Activate channel6 Deactivate channel

TS allocation:0 Display1 Tx/Rx time slots2 Tx time slots only3 Rx time slots only

Select time slot:1...31

Bit mask:previous:

B1 . . . 8

4

1

1, 2, 3

SETTINGS: 6,9,u,2,n,4

6


Settings


Give channel number

Channel configuration:0 Display1 Interface type3 Operating mode4 Bus configuration5 Activate channel6 Deactivate channel

1...8

2

1...8

1111 0000

n

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7 Measurements

Voltage measurements:1 +5 V2 -12 V3 +12 V

DIU-19A Measurements:1 Supply voltages

CPU-resets:0 Display1 Clear counters

DIU-19A Testing:1 Set and test defaults2 Channel test3 Deactivate all channels

Supply voltage +5V/-12V/+12V:0 Display voltage1 Display voltage (float)2 Calibration

1, 2, 3

4 A/D test5 Memory testing6 Memory operations7 RUNTEST

8 Statistics

9 Testing

MEASUREMENTS: 7,9,u

STATISTICS: 8,9,u,1

TESTING: 9,9,u

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2 USER INTERFACE, GENERAL

F1

MODE

F2

OBJ

F3

TOP UP

HELP >...

STO DEF DATA

D E FINV

A B CDEL

EXP . AUTORET,0-

ASCII

4 5 6

1 2 3

F4

Select function:1 Fault display2 Cancel local alarm3 Reset local cancel

ONOFF

RCL

7 98

#

TS2105FA1

Figure 1 Service Terminal keys

The user interface in the Data Unit CU 24021 has been implemented bymeans of the service interface of the main unit (DYNACARD multiplexer) and a service terminal, Figure 1. The main unit provides the mainmenu, in Figure 2, for the equipment to allow the user to select thedesired unit as target for procedures.

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Select operation:1 Fault display2 Local alarm cancel3 Reset local cancel4 Identifications5 Controls (temporary)6 Settings (permanent)7 Measurements8 Statistics9 Testing

10 User privileges11 Miscellaneous*

Figure 2 Main menu

Items 1 ...3 on the main menu refer to faults and the handling of faults inthe equipment or inone of its units. Items 4 ... 11can beused tocontrol orhandle functions on unit level.

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3 FAULTS SUPERVISED BY THE UNIT

The Data Unit CU 24021 supervises its own faults by means of a unit-specific faults table which it updates in the main unit and uses to controlits own service LEDs.

The faults supervised by the data interface unit are:

- power supply fault- memory fault- loop to interface- loop to eq. bus- test state- channel fault- forced indication- configuration error- incoming line signal missing

The main unit connects the unit-specific fault tables to a common faultdisplay which can be brought up using main level selection 1 ( FAULT DISPLAY ).

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Example:*DM 2 ABC (AS)

DIU-19A (unit 3)- loop to interface

The fault display contains:- the equipment identification ( DM2 ABC )- fault classification ( A,B,D or S or a combination of them)- the unit indicating the fault ( DIU-19A (unit 3))- type of fault ( loop to interface)

A fault can be indicated for the unit and equipment by means of serviceLEDs andrackspecificalarms. A rack alarm canbedeactivated with mainmenuselection 2 ( Local alarm cancel ) andreactivated with selection3 (Reset local cancel ).

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4 DATA INTERFACE UNIT MENUS

4.1 Identifications

4,9,u DIU 19A Identifications ( u = unit location)

DIU 19A Identifications:3 User manual5 HW -unit6 Program ID

7 Modify ID

Menu items 3,5,6 display the number of the user manual for the unit andthe type designation including version designation of the unit and its program.

The identifications are set at the factory. The version designation in theunit's type designation can, when required, be modified by means of menu item 7.

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4.2 Controls

5,9,u DIU 19A Controls

DIU 19A Controls:0 Display Ctrls1 To normal state2 Interface controls3 Monitoring4 Forced indications

5,9,u,0 Display Ctrls

This selection displays the channel-specific controls of the unit. Example:

Interface

type Controls Status

IF1 V.28 - - nA IF2 V.28 L1 - nA IF3 V.28 - - A IF4 V.28 L2 Txd = 1 A IF5 V.28 - - nA IF6 V.28 - - nA IF7 V.28 - - nA IF8 V.28 - - nA

The display indicates the channel-specific electric interface type (V.28),its temporary controls (L1,L2,TxD=1) and the channel status (A, nA).

5,9,u,1 To normal state

This selection forces all the controls of the unit into normal state.

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5,9,u,2 Interface controls

This selection asks for the interface number, whereafter the followingmenu is displayed:

Interface controls:0 Display1 To normal state2 Loop to interface3 Loop to eq. bus4 Forced data

Selection 0 displays the interface state.

Selection 1 is used to return the interface to normal state.

Selection 2 loops the incoming signal on the channel back to the interfaceoutput ( loop L1 ). This loopback is possible for activated channels only.The selection will activate an error indication due to loopback.

Selection 3 connects the signal coming from the 2 Mbit/s frame back tothe frame ( loop L2 ). The selection will activate an error indication due toloopback.

When item4 is selected, the following forceddatamenu willbedisplayed:

Forced data:0 Display1 TxD normal2 TxD = 03 TxD = 1

Selection0displaysthecurrentstateofthedata.Items2and3canbeusedto force the data into a certain state and item 1 to release the forced control. When forced data is selected, an error indication will be activateddue to test state.

5,9,u,3 Monitoring control

By means of the monitoring control menu, the signal going to the monitoringpin of the unit may be selected. The incoming or outgoing data signal ( TxD, RxD) on any channel can be monitored.

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4.3 Settings

6,9,u DIU-19A Settings

The main menu for the data interface unit settings is:

DIU-19A Settings:0 Display all1 Deact. all channels2 Channel configuration3 Copy channel

5 Activate channel6 Deactivate channel7 Control timeout8 Read/Save all

6,9,u,0 Display all settings

Selection 6,9,u,0 displays all settings for every channel. Example:

Interface settings

Interface-type Rate Mode TS/ B1 ... 8 Status

IF1 V.28 2400 TC TS31/10000000 nA IF2 V.28 2400 TC TS31/01000000 nA IF3 V.28 4800 TC TS31/00110000 nA IF4 V.28 9600 TC TS31/00001111 nA IF5 V.28 2400 TC TS30/10000000 nA IF6 V.28 2400 TC TS30/01000000 nA IF7 V.28 4800 TC TS30/00110000 nA IF8 V.28 9600 TC TS30/00001111 nA

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The interface-specific settings are:

Interface type:- indicates the electrical configuration of the interface.

Rate:- indicates the maximum asynchronous data transfer rate (where the

distortioncaused by the operating mode is less than 8 %). The speedis computed based on the operating mode and the bit allocation of the channel.

Operating mode:- indicates the transfer method employed by the channel in the 2M

frame structure.

The methods are:- TC = Transition coding- S = Sampling- S&F = Sampling and filtering.

Time slot settings and bit allocation (TS/ B1 ... 8):- indicate the bits reserved by the channels in the 2M frame structure.

Channel state (status):- indicates the connection of the channel to the 2M frame structure

and possible loopbackconnections of the channel.The channel states are:- activated A - non-activated nA - queuing act. QA - queuing deact. rA.

A queuing state gives an error indication to the main unit.

Channel loops:- Loop to interface L1- Loop to eq. bus L2.

A loop will give an error indication to the main unit.

6,9,u,1 Deactivate all channels

By entering 6,9,u,1 all channels will be deactivated. No channel will thenbe connected to the 2M bus.

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6,9,u,2 Channel configuration

Selection6,9,u,2 is used to modify the channelspecific settings.Thechannel configuration is presented in more detail in Chapter 4.4

6,9,u,3 Copy channel

By selection 6,9,u,3 the channel settings can be copied to another channel.

6,9,u,5 Activate channel

With the selection 6,9,u,5 a certain channel may be connected to the 2Mbus.

6,9,u,6 Deactivate channel

With the selection 6,9,u,6 a certain channel may be disconnected fromuse.

6,9,u,7 Control timeout

This selection is used to set the time for which the controls are valid without refreshment. The factory setting is 10 min.

Control timeout:0 Display1...65000 min.

6,9,u,8 Read/save all

Read/Save all:1 Read settings2 Write settings

Selection 1 can be used to store the unit settings when replacing it.

Selection 2 can be used to write the earlier stored settings into the new

unit.

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6,9,u,2,cha,3 Operating mode

The operating mode menu is:

Operating mode:0 Display1 Transition coding (TC)2 Sampling3 Sampling + filtering

This menu can be used to select and display the transfer method of theoutgoing signal in the 2 Mbit/s frame structure.

6,9,u,2,cha,4 Bus configuration (channel allocation):

The menu is:

Bus configuration:0 Display1 TS allocation5 Activate channel6 Deactivate channel

Selection 1 will display:

TS allocation:0 Display1 Tx/Rx time slots2 Tx time slots only3 Rx time slots only

Selection 0 displays the time slot allocation used by the channel.

The display is of the form:By selections 1...3 the time slot 1 ... 31 and bit mask are chosen.

The bit mask menu is as follows:Bit mask: previous: 11110000

B1 .. 8

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It is possible to enter 1, 2, 4 or 8 ones (1) into the bit mask depending onthetransmissioncapacity required by thechannel. Themaximum asynch

ronous data transfer rate of the channel is computed based on the bitmask and operating mode.

4.5 Measurements

7,9,u Measurements

DIU-19A Measurements:

1 Supply voltages

7,9,u,1 Voltage measurements

The following menu is displayed:

DIU-19A Measurements:1 Supply voltages

Voltage measurements:1 Supply voltage +5 V2 Supply voltage -12 V

3 Supply voltage +12 V

This selection is used to display or calibrate the +5 V, -12 V or +12 V

supply voltage.

Supply voltage +5V/-12V/+12V:0 Display voltage1 Display voltage (float)

2 Calibration

Selections 0 and 1 are used to display the measured voltage and selection2 to calibrate the voltage measurement in the factory.

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4.6 Statistics

8,9,u DIU-19A Statistics

DIU-19A Statistics:1 CPU counter

Selection 8,9,u,1 displays the following menu:

CPU resets:0 Display1 Clear counter

Selection 0 displays the number of CPU resets in the unit since the pre vious clearing.

Selection 1 clears the counter.

4.7 Testing

9,9,u DIU-19A Testing

Selection 9,9,u brings up the following testing menu:

DIU-19A Testing:1 Set and test defaults2 Channel test3 Deact. all channels4 A/D -test5 Memory testing6 Memory operations7 RUNTEST

Selection 1 sets and tests the defaults. In the event of error, the test willactivate an error message.

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Selection 2 can be used to test all transfer rates and operating modes for aspecified channel. In the event of error, this test will display the incorrect

transfer rate and operating mode.With selection 3 all channels are deactivated.

Selection 4 is used to test the A/D converter.

The memory testing (item 5) is employed to locate possible RAM,EPROM or EEPROM failures.

The memory operation (item 6) is used to read and write in the desiredmemory location.

Selection 7 can be used to display a possible failure which has beendetected by the diagnostic routine.

C33129_20-DIU19A

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