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AVEVA™ Historian

Alarm summary options tab

  • Last UpdatedFeb 27, 2025
  • 2 minute read

Use the Alarm summary options tab to specify how the results of the query are presented.

Alarm summary options tab with average alarm rate selected.

Options are as follows:

  • Average alarm rate on hourly basis: This query calculates the average number of alarm events raised per hour for the selected time range.

    Result of average alarm rate query.

  • Most frequent alarm per hour: This query calculates the frequency of alarm events raised per hour for the selected time range, listed in order from highest to lowest frequency.

    Results of most frequent alarm per hour query.

  • Pinpointing where alarms occur: This query lists all alarm events raised for the selected time range, grouped by area, object, and alarm type.

    Result of pinpointing where alarms occur query.

  • Average time to clear an alarm (severity based query): This query shows you the average amount of time each alarm event remained active before being cleared, grouped by alarm severity.

    Results of average time to clear an alarm (severity based query).

  • Average time to clear an alarm (user based query): This query shows you the average amount of time each alarm event remained active before being cleared, grouped by Historian user.

    Result of average time to clear an alarm (user based query).

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