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Required Modbus driver for 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 IA 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)
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