An alarm journal stores historical information about alarms in a database. It can store basic data about alarms that have occurred, such as their source and timestamp, along with associated data on the alarm, and the values of the alarm's properties at the time the event occurred. The alarm journal is used by the Alarm Journal Table Component, and can be accessed through scripting functions and direct database queries.

The Gateway can have more than one Alarm Journal. Alarm Journals have options to filter which Alarms are stored in the journal therefore by having more than one alarm journal configured on the Gateway it is possible to store some alarms in one table and different alarms in a different table.