Filter alarms

You can filter current and historical alarms by using query filters. A query filter is a collection of filter criteria in a logical construct.

For example, you can filter alarms by defining a query filter that only shows alarms with priorities larger than 500 and smaller than 750.

You can re-use the filter queries you define for historical alarms for current alarms and vice versa. You can also re-use filter queries you define at design-time at run time and vice versa.

Important: Query filters for current alarms and recent alarms and events require at least Provider and Group as filter criteria. These must use the equal sign.

When you use TimeLCT, TimeOAT, or TimeLCTOAT as filter criteria for historical alarm modes, you must ensure that the TimeSelector.StartDate and TimeSelector.EndDate properties do not limit the query. Otherwise, the AlarmApp can possibly not return all alarm and event records.

Set the TimeSelector.StartDate property earlier than any time filtering requirement, and the TimeSelector.EndDate later than any time filtering requirement.