Alarm and Event Views (Backward Compatible)

The following Alarm and Event views are included for backward compatibility:

• Events *

• v_EventHistory *

• v_AlarmHistory *

• v_AlarmHistory2 *

• v_AlarmEventHistory2 *

• v_AlarmEventHistoryInternal2 *

* These views reflect the tables within the WWALMDB and A2ALMDB databases, or history blocks. For details about the related and tables, see "Recording Alarms into an Alarm Database" in the AVEVA InTouch HMI Alarms and Events Guide.

The columns of these views are generally compatible between history blocks, and the WWALMDB and A2ALMDB databases, except for the following exceptions in history blocks:

• User1 for alarms: Alarm Severity

• User2: Not populated

• User3: Not populated

• UnAckDuration: Format is in milliseconds.

  Note: Earlier versions of AVEVA Historian stored alarm and event in history blocks. They could alternatively be stored in the A2ALMDB database. Earlier versions of AVEVA System Platform used WWALMDB database to store alarms and events. For more information, see A2ALMDB Database in the AVEVA Historian Administration Guide.