Ingersoll-Rand CMC Default Modbus Settings


Thread Starter

Ben Schumacher

I believe some of the default settings are 9600 baud, 8 data bits, 1 stop bit and no parity. However, I can't figure out if it should be RS-422, RS-485 2-wire or 4-wire. Does anyone know what these settings would be?

Is Modbus communication even enabled before an IR tech configures Modbus? I'm sure that if I had an IR tech come out, I could just have him set it to whatever I want.
It appears that the documentation available to you lacks the basics about the serial port and its default setup.

Does whatever documentation you have access to provide the Modbus register map?

If not, of what value is the port configuration?

I ask because compressor mfg's seem to hide documentation on this kinda stuff.