Yokogawa JUXTA VJ Series Limit Alarms Manual de usuario descargar pdf (Pagina 8)

IM 77J01J11-01E

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4. Ladder Communication.......................................................................... 4-1

4.1 Overview.......................................................................................................... 4-1

4.2 Commands/Responses at the PLC ................................................................ 4-2

4.2.1 Command/Response Component Elements ..................................... 4-2

4.2.2 Reading Parameters......................................................................... 4-3

4.2.3 Response Error Codes ..................................................................... 4-4

5. MODBUS Communication...................................................................... 5-1

5.1 Overview.......................................................................................................... 5-1

5.1.1 Configuration of Message ................................................................. 5-2

5.1.2 Specifying D Registers...................................................................... 5-3

5.2 Function Codes ............................................................................................... 5-4

5.2.1 List of Function Codes ...................................................................... 5-4

5.2.2 Response Error Code[Response] ..................................................... 5-8

5.3 Example of Setting up Commercially Available SCADA Software ............... 5-9

6. Functions and Usage of D Registers ..................................................... 6-1

6.1 Overview of D Registers ................................................................................. 6-1

6.2 Interpretation of D Register Map Table .......................................................... 6-1

6.3 D Register Map Table ...................................................................................... 6-2

6.3.1 Contents of D Registers .................................................................... 6-3

7. Functions and Usage of I Relays ........................................................... 7-1

7.1 Status............................................................................................................... 7-2

Appendix Table of ASCII Codes (Alphanumeric Codes) ............................App.-1

Revision Information ............................................................................................ i

3rd Edition : Oct. 15, 2007-00

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Yokogawa JUXTA VJ Series Limit Alarms Manual de usuario Pagina 8