Niagara R2 LON-USB Adapter Configuration for LON2 Interface

[Product_Support]

Issue

A LON-USB adapter is configured as LON2 on a Windows laptop. Attempts to change its address to LON1 have failed. The Niagara R2 station running the LonWorks Service defaults to LON1. Can the station use LON2 instead?

Product Line

TAC IA Series

Environment

• Niagara R2 station
• Windows laptop with LON-USB adapter

Cause

The LonWorks Service in Niagara R2 defaults to LON1 for the interface. The inability to modify the adapter address prevents direct use of LON2 without configuration changes.

Resolution

• Open the Admin Tool in Niagara R2.
• Navigate to the Installation tab and locate the drivers.properties file.
• Modify the line:

  lon.deviceName=LON1
  

  to:

  lon.deviceName=LONx
  

  where x is the desired port number (e.g., LON2).
• Save the changes and restart the station for the new configuration to take effect.