To enable BACnet communications in an I/A Series (Niagara) UNC station, enter a valid instance number.

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Issue

To enable BACnet communications in an I/A Series (Niagara) UNC station, enter a valid instance number.

Environment

I/A Series  R2 (Niagara) UNC, all versions

Cause

The BACnet Service in the UNC defaults to instance number = -1, which prevents the BACnet service from communicating.

Resolution

Assign a valid Instance Number on the General, Config tab of the BACnet service. The valid range is from 0 to 4194302.

See the Niagara BACnet Integration Reference, Chapter 1, "Configuring Essential Station Properties", Procedure 1-2, Step 2.

Note: In addition to setting the Instance Number, the appropriate Link-Layer must be enabled, eg, "ipEnable = True".