Set up GE RX3i PLC to read Modbus TCP

[wlr3m4]

Is this possible? I want to read values from a power meter directly into my PLC. Is there any kind of documentation on how to set this up?

My CPU is a IC695CPE305.

 

[gclshortt]

PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual

http://geplc.com/downloads/Labs/GFS-384%20M10%20Modbus%20TCP.pdf

The Modbus TCP Client will communicate to the Modbus TCP Server. The PLC will be the Client and the power meter will be the Server.
Your power meter will have the Modbus addresses that indicate parameters that you want to read in this Server.

I hope this helps you out.
Regards,

 

[fredbear]

I'd give it a miss. The implementation of Modbus/TCP in the Rx3/7i is horrible. You are much better off in my opinion getting a Modbus/TCP to Modbus/RTU converter/gateway and connecting it to a CMM module in your PLC rack.

 

[NetNathan]

it is just a little complicated, plenty of info on setup though.
I would get through it, once you are done you will have minor problems setting it up in the future.

I had problems with about 4 settings, after I got that resolved everything went great.
It is a lot easier if you only want to read (not write to device)....you don't have to close the connection, just set a timer for how often you want to read required integers.
This is important if you have more than 1 device you want to read from, just sequence the read commands so you do not try to read from more than one device at the same time.