Hi. I have a modbus client running successfully over RS485 and need another modbus instance on RS232. I have added a new serial device, and have successfully tested the new instance both on the original RS485 interface, and on a USB-Serial cable. I cannot, however get it to work on the RUT956 serial port. When I test the modbus device using “Request Configuration testing”, I receive “Failed to test request, check your configuration”, and if I monitor the serial port during the request, the request does not match the expected modbus command:
Request should be: C8 10 00 03 00 02 04 00 04 00 1E A0 EC
Serial monitor shows: E3 F7 F9 FF FB F7 FF F7 FF D7 BF 29 00
I’m sure I’m missing something, but have run out of ideas…