History block storage for alarms and events

Historian can store alarm and events history in history blocks.

For information about setting up history blocks for alarms and events, see the AVEVA System Platform Installation Guide.

You can migrate alarms and events from the A2ALMDB database to history blocks. For more information, see Migrate data from the A2ALMDB database to history blocks.

Note: Alarms and events from AVEVA Application Server versions prior to 2014 R2 were stored in the A2ALMDB database. Events previously configured using the Classic Event subsystem were stored in SQL Server tables in the Runtime database.