Issue
Microsmart controllers do not respond to Niagara R2 schedules after a brief power outage. The UNC appears online, but Microsmart shadow objects stop updating.
Product Line
TAC IA SeriesEnvironment
- Niagara R2 (all versions)
- Microsmart controllers (all versions)
Cause
When building power fails for less than 60 seconds:
- The UNC performs a graceful shutdown using its backup battery but never fully powers down.
- Microsmart controllers reboot and come back online.
- The UNC assumes controllers are still online, but the link between Microsmart shadow objects and physical points is lost during the outage and does not automatically recover.
Resolution
- Reboot the UNC to re-establish communication between Microsmart shadow objects and the controllers.
- Verify all schedule links after reboot to ensure proper operation.
