Issue
Can both RS-232 ports be used for Modbus simultaneously on an I/A Series UNC-520?
Environment
I/A Series UNC-520
Cause
The I/A Series UNC-520 is licensed with the Modbus master driver IA-DRV-MOD. The requirement is for the UNC to communicate Modbus to third party controllers using RS-232.
Resolution
Yes ...both I/A Series UNC-520 RS-232 ports can be used simultaneously with the Modbus driver IA-DRV-MOD (ModbusAsync) set for COM1 and COM2.