I have a project which i will need to use both comm ports as modbus rtu master. I purchased a 1763-nc01 for the mini din connector(channel 0) but would like to use the 9 pin serial connector(channel 2).
I got the serial port to work. The problem is the application both work on channel 0 perfectly but only has issues when using channel 2. The only difference i see is channel 0 will let me change the protocol to no handshaking 485 network. but channel 2 does not have that same option.
The application is
channel 0
modbus controlled solid state relay for lighting.
19200 even 8 data bit 1 stop bit
channel 2
modbus controlled thermostats for gas heaters in the plant. adjusts the setpoint depending on if the plant is occupied.
19200 none 8 data bit 1 stop bit