Yokogawa JUXTA M Series Digital Limit Alarms MVTK - Manual (Page 8)

IM 77J04J11-01E 1st Edition : 2006.08.25-00
Toc-2
3.3 Communication with Higher-level Devices ................................................. 3-20
3.3.1 Example of Communication Program Created Using Visual Basic .. 3-21
3.3.2 Communication with UT Link Module .............................................. 3-25
3.3.3 Communication with Touch Panel ................................................... 3-26
4. Ladder Communication .......................................................................... 4-1
4.1 Overview .......................................................................................................... 4-1
4.2 Commands/Responses at the PLC ................................................................ 4-2
4.2.1 Configuration of Command/Response .............................................. 4-2
4.2.2 Reading Parameters ......................................................................... 4-3
4.2.3 Writing Parameters ........................................................................... 4-4
4.2.4 Response Error Codes ..................................................................... 4-5
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
03 Reads data from multiple D registers ...................................... 5-5
06 Writes data into a D register .................................................... 5-7
08 Performs loop back test .......................................................... 5-9
16 Writes data into multiple D registers ...................................... 5-10
5.2.2 Response Error Codes ................................................................... 5-12
5.2.3 Specifying Broadcast ...................................................................... 5-13
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