GE Fanuc 90-30 series with Modbus Master RTU


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I made a connections and terminations for interfacing of GE Fanuc 90-30 series PCM port 2(Mega Basic application of Modbus Master RTU loaded), RS485 2-wire with Solartron Flow computer, S485 2-ire as suggested by Mr. Alan Hartwell.

The reported message in modbus nmaster is bad error for reading of inputs function code 1 or 3. You have mentioned in earlier reply that "make sure the configuration of the comm port disables the receiver durung transmit. Please suggest how to configure to disable the receiver comm port durung transmit.