Which Modbus driver is required for a Niagara R2 UNC to support Modbus RTU RS-485?

Issue

Which Modbus driver is required for a Niagara R2 UNC to support Modbus RTU RS-485?

Product Line

TAC I/A Series

Environment

  • Niagara R2 UNC 
  • Modbus RTU RS-485

Cause

The correct Modbus driver must be installed to allow communication between Niagara R2 and Modbus RTU RS-485.

Resolution

The Modbus drivers can be installed on the UNC-510-1 and UNC-520-2 models, with a maximum supported baud rate of 19.2k for the UNC-510, and 76.8k for the UNC-520.

The part numbers are:

  • IA-DRV-MOD (master)
  • IA-DRV-MOD-S (slave)