Emerson Exchange 365

In reply to Jimmy Lee:

Vikram, the serial ports DO support Modbus RTU. The lowest cost solution to accomplish what you want would be to add a Versamax Serial to Ethernet adaptor (IC200SET001) in front of one of the serial ports. The best solution would be to update the CPUE05 to a CPE100 (You would also need a Versamax PNS).

In PME make sure "Toolchest" is checked in the View ribbon tab.
In the Toolchest dropdown, select "LD Instructions"
Expand the "Communications" branch of LD instructions and you will see "Modbus_TCP_RW"
alternatively,
Expand "Data_Move" and you will see "Comm_Req".

The former solution is only in Versamax, but the Comm_Req is in all the new Emerson PAC controllers.
Comm_Reqs are not fun.

Note that IC200CPUE05 does not support Modbus TCP, either as a client/master or as a server/slave. IC200CPUE05 does support EGD and SRTP.

You could use another Emerson CPU as a gateway, for example a PACSystems RSTi-EP EPSCPE100, with the CPE100 acting as the Modbus TCP interface and using EGD to the IC200CPUE05. CPE100 supports Modbus TCP as a server/slave with just configuration or as a client/master with programming. For client/master we have function blocks to simplify the implementation.

In reply to Mike Hu:

Mike, the Modbus_TCP_RW instruction only works on some of the Versamax Micro CPU's. The CPUE05 is a Versamax modular CPU.