MANUAL_VT_1xx_2xx_4xx_INST14-G.DOC.pdf

Index

1 INTRODUCTION.......................................................................................................4

2 GENERAL INFORMATION ON ELECTROMAGNETIC COMPATIBILITY...............5

2.1 Disturbance suppression circuit with RC....................................................................................6

2.2 Disturbance suppression circuit with Diode...............................................................................7

3 POWER SUPPLY......................................................................................................8

4 TROUBLESHOOTING PROCEDURES..................................................................10

INSTALLATION MANUAL VT100/110

5 FRONT AND REAR PANEL DESCRIPTION ..........................................................14

5.1 Front of VT100/VT110..................................................................................................................14

5.2 Rear of VT100/VT110....................................................................................................................15

6 DIMENSION AND PANEL CUT-OUTS ...................................................................16

7 INPUT/OUTPUT MODULE VT100INOUT2 SOURCE.............................................18

8 20 KEY KEYBOARD DRIVE VT100MT1000 ..........................................................19

8.1 Connection with VT100 ...............................................................................................................20

9 COM1 SERIAL CONNECTION ...............................................................................21

10 LCD ADJUSTMENT..............................................................................................23

11 PROGRAMMING THE VT.....................................................................................24

11.1 General operations with non-directly programmable VTs.....................................................24

11.2 General operations with directly programmable VTs.............................................................25

11.2.1 Connection cablesVT ⇔ PC..............................................................................................26

11.3 Loading the project into the memory of non-directly programmable VTs...........................27

11.4 Loading the project into the memory of directly programmable VTs...................................28

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Index

12 MULTIPLE PROGRAMS.......................................................................................29

13 VT-PLC INFORMATION EXCHANGE AREA .......................................................30

13.1 Table of common data exchange registers.............................................................................30

13.2 Key decoding..............................................................................................................................31

13.3 Status bit.....................................................................................................................................31

13.4 Exchange bit for leds.................................................................................................................32

13.5 Table of register for Input/Output.............................................................................................32

13.6 Word table for alarms ................................................................................................................34

14 PRODUCTS LIST..................................................................................................35

15 SPECIFICATIONS.................................................................................................36

INSTALLATION MANUAL VT2x0/4x0

16 FRONT AND REAR PANEL DESCRIPTION........................................................38

16.1 Front of VT2x0/4x0.....................................................................................................................38

16.2 Rear of VT2x0/4x0 ......................................................................................................................39

17 DIMENSION AND PANEL CUT-OUTS.................................................................40

18 FITTING THE BATTERY.......................................................................................41

19 VT COMMUNICATION PORTS.............................................................................42

19.1 Parallel interface.........................................................................................................................44

20 CONNECTION CABLES VT ⇔ PC.......................................................................45

21 BRIGHTNESS AND CONTRAST ADJUSTMENT ................................................46

22 CONNECTING THE VT IN MULTIDROP..............................................................47

22.1 Power supply for terminals in multidrop network ..................................................................49

22.2 Selecting the VT parameters in multidrop...............................................................................50

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Index

23 CONNECTING THE VT IN A DATA COLLECTION NETWORK...........................51

23.1 Selecting the VT parameters in a data collection network....................................................52

24 PROGRAMMING THE VT.....................................................................................53

24.1 Loading the plc driver in the VT...............................................................................................53

24.2 Loading the display page in the VT..........................................................................................54

25 THE MULTIPLE PROGRAMS...............................................................................55

26 VT-PLC INFORMATION EXCHANGE AREA........................................................56

26.1 Table of common data exchange registers.............................................................................56

26.2 Key decoding..............................................................................................................................58

26.3 Status bit.....................................................................................................................................59

26.4 Exchange bit for leds.................................................................................................................60

27 PRODUCTS LIST..................................................................................................61

28 SPECIFICATIONS.................................................................................................62

29 CUSTOMER SERVICE..........................................................................................63

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Introduction

1 Introduction

The VT operator terminal is used for displaying and setting data, and showing

the status or alarm messages for the machines or plants controlled by the PLC.

The terminal is a versatile and economic solution because it communicates

directly with the PLC using the programming connector without requiring any

additional hardware.

The operator terminal is programmed using programming software that enables

the data to be transferred to the unit's memory.

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General information on electromagnetic compatibility

2 General information on electromagnetic

compatibility

Electronic devices are being increasingly used in automated systems.

programmable controllers (like the PLC) belong to this category, as do Man-

machine-interface systems (eg the Video Terminal), control systems (eg

diagnostic panels), interface elements (eg interface boards) and activators (like

inverters). Together with this type of electronic apparatus, you find installed

classical electro-mechanical devices like counters, electro-valves, motors etc.

Electrical disturbances caused by the operation of these devices can

compromise the smooth functioning and the length of the working life of the

electronic devices present on the same switchboard or the same plant. To get

the best out of both the electrical and the electronic devices it is necessary to

reduce electrical disturbance.

Laying cables. Remember to lay measurement, monitoring and communication

cables so that they are kept apart from power cables. Power cables laid close

and parallel to communication cables can cause coupling voltages that are

strong enough to disturb or destroy electronic components.

Shielding of cables. It is essential to use suitably shielded cables for

communication signal connections (total shielding is recommended). The

shielding must be connected to the zero potential.

Earthing of shielding and electronic circuits. With many devices the "0V" is

connected to the earth. The signal ground must be earthed but it is best to

separate the ground of the shields and circuits from that of the power circuits.

Note that the earth can only perform its function if the "Resistance of the earth

circuit" is within the max. limits prescribed.

Switching of capacitive loads. The current peaks which occur when capacitive

loads are switched on can damage or destroy control devices. Furthermore, the

high-frequency component of the current peak can cause serious disturbance in

electronic circuits caused by inductive coupling between the connection cables.

Switching of inductive loads. When and inductive load is switched off, the

magnetic energy stored tends to oppose this, discharging a voltage peak down

the line which can damage or destroy the control device. Furthermore, the high-

frequency component of the voltage peak can cause disturbance caused by

capacitive coupling between the connection cables.

The physical structure and characteristics of an inductive load make it impossible

to carry out switching without disturbance unless suitable measures are taken.

The disturbance can be at least partially suppressed by fitting a suitable

disturbance-suppression module in parallel with the inductive load. The

disturbance-suppression module must not constitute an additional load during

the work phase. Electrical disturbance is propagated both through the

connection cables and electromagnetic transmission. If the disturbance is

propagated by cable or electromagnetic transmission, it is much more difficult to

suppress at the inputs to the units in the danger zone than it is to suppress the

disturbance at its source.

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