Dear Sir In our plant we have ABB MP200 Controller that is connected to our telemetry system via serial communication Rcom protocol .Now we are revamping the control system and changing controller MP200 to AC800M and we have to change communication protocol Rcom because new controller dos'nt support old Rcom protocol.We couldn't find any solution,if someone has any idea please help us.
RCOM is basically Modbus RTU. But unfortunately it is not completely compatible.
If you're not able to upgrade the RCOM devices, then you can build a custom serial interface with standard functions in the AC800M SerialLib and connect to the RCOM slaves using a CI853. It's quite possible that someone has already done this.