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I try to communicate with slave device by using Modbus RTU RS 485 2 wire connection. It appears that the slave device is receiving data as the COMM LED on the slave device flashes when I ask it via Modscan64.
Problem is that there is no data comming back. All I get is an "received invalid response to modbus query" error message. Any suggestions to what might be wrong or how to check would be appreciated greatly.
Problem is that there is no data comming back. All I get is an "received invalid response to modbus query" error message. Any suggestions to what might be wrong or how to check would be appreciated greatly.