Issue
When polling BACnet points with an I/A Series R2 (Niagara) UNC, the Standard Output Window displays the warning:
“BACnet Read Property Multiple Error” followed by a property name and device or object name.
“BACnet Read Property Multiple Error” followed by a property name and device or object name.
Product Line
TAC IA SeriesEnvironment
I/A Series R2 (Niagara) UNC or BACnet Server
Cause
The warning occurs because the BACnet device being polled does not support the Read Property Multiple function.
The station attempts to use this function for efficiency, but when unsupported, the device responds with an error.
The station attempts to use this function for efficiency, but when unsupported, the device responds with an error.
Resolution
- This is normal operation and does not indicate a failure.
- All requested data will still be retrieved because the station automatically falls back to polling each property individually.
- To suppress the warning messages:
- Set the device’s Read Property Multiple property to false in the configuration.
- Note: Disabling Read Property Multiple will slow down polling for that device.
