Alarm Management for Enhanced Failover

When using the Enhanced Failover feature you should be aware of the following alarm management features:

  • The Current Alarm, Alarm Priority, Current Value, Latched Alarm, and Alarm Acknowledgements all reside in the iFIX database. These are included as part of the database synchronization process.
  • If you used Alarm Synchronization (Alarm_sync.exe) in an iFIX release prior to 5.0, this feature is replaced by the alarm management and database synchronization available in iFIX 5.1. Alarm_sync.exe is obsolete and should no longer be used.
  • With Enhanced Failover enabled, alarms are generated only on the active SCADA node.  
  • Since the active node is the only one generating the alarms, only its SAC process is generating alarms.
  • During the failover process, from active to standby, both the standby and active SCADA will temporarily generate alarms until the failover is complete.
  • If the iClient cannot access the active node through iFIX networking, but can access the standby SCADA through iFIX networking, the iClient uses the data on the standby node. This allows the Alarm Summary to update the current value and acknowledgement status, but it does not retrieve any new alarms until it can access the active node.

 

See Also