Energy Meter Manual

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IM 77C01E01-10E
4.4 Sample Program ........................................................................................... 4-17
4.4.1 Example of BASIC Program for Send and Receive ......................... 4-17
5. Modbus/RTU and ASCII Communication Protocols
5.1 Overview.......................................................................................................... 5-1
5.1.1 Configuration of Message ................................................................. 5-3
5.1.2 Specifying D Registers...................................................................... 5-4
5.1.3 Checking Errors ................................................................................ 5-4
5.1.4 Configuration of Response ............................................................... 5-7
5.1.5 Specifying Broadcast ........................................................................ 5-9
5.2 Message and Response ............................................................................... 5-10
03 Reads data from multiple D registers ............................................ 5-11
06 Writes data into D register ............................................................. 5-12
08 Performs loop back test ................................................................. 5-13
16 Writes data into multiple D registers.............................................. 5-14
6. Modbus/TCP Communication Protocol
6.1 Overview.......................................................................................................... 6-1
6.2 TCP/IP Communication .................................................................................. 6-3
6.3 Network Frame Structure ............................................................................... 6-4
6.3.1 MBAP Header Structure ................................................................... 6-4
6.3.2 PDU Structure .................................................................................. 6-4
6.4 Communication with Higher-level Devices ................................................... 6-5
6.4.1 List of Function Codes ...................................................................... 6-5
6.4.2 Specifying D Registers...................................................................... 6-5
6.4.3 Request and Response .................................................................... 6-6
03 Reads data from multiple D registers .............................................. 6-6
06 Writes data into D register ............................................................... 6-7
08 Performs loop back test ................................................................... 6-8
16 Writes data into multiple D registers................................................ 6-9
6.4.4 Response Error Codes ....................................................................6-11
6.5 Sample Program ........................................................................................... 6-12
6.5.1 Example of BASIC Program for Send and Receive ......................... 6-12
7. Functions and Usage of D Registers
7.1 Overview of D Registers ................................................................................. 7-1
7.2 Configuration of D Registers.......................................................................... 7-1
7.3 Interpretation of D Register Map Table .......................................................... 7-1
7.4 D Register Map ................................................................................................ 7-2
8. PR201 Original Communication Protocol
8.1 Overview.......................................................................................................... 8-1
8.2 Communication Specifications ...................................................................... 8-1
8.3 Command/Response Format ......................................................................... 8-2
8.4 List of Commands........................................................................................... 8-3
8.5 Command Details............................................................................................ 8-5
Appendix Table of ASCII Codes (Alphanumeric Codes)
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