Parent alarm timeout

The parent alarm timeout allows you to suppresses a child alarm for the configured timeout value after its parent enters an alarm state.

When a parent record goes into alarm or enters a different alarm state, the children (for example, the alarm suppression records that have the alarmed record as their parent) are marked as suppressed. The alarm suppression timeout is set up, and, at expiration, the children’s alarm conditions are reevaluated. If at the time of reevaluation the child is in a different alarm state than where it was when suppression was triggered, the system generates an alarm. The alarm suppression is cleared once the alarm suppression timeout expires.

If configured for state-specific suppression, the child alarms that come into the system are checked to ensure that they match the configured state(s) to be suppressed.

In the figure shown above, the parent alarm occurs and the child alarms are suppressed. The parent returns to normal before the alarm suppression timeout value expires.

Child alarms are reevaluated when the parent alarm timeout value expires. This value can be set to a relatively short value or to a value that is beyond the parent’s alarm duration.

Note: The alarm suppression timeout value is not reset if the parent transitions to normal and then back to alarm state before the timeout value expires.