# AlarmIdentifier

AlarmIdentifier is a write-only connection. Assign a numeric tag to this connection.

If the Use Alarm Identifier check box on the Messages tab of the Alarm Setup editor is | and the Use Alarm Identifier check box on the General tab of the object's Properties dialog box is | Alarm identifier in the alarm log file (history.alm) shows | The AlarmIdentifier connection is
Selected | Selected | The value specified on the Messages tab. If the Alarm Identifier column on the Messages tab is empty, the value is 0. | Updated with the value specified on the Messages tab. If the Alarm Identifier column on the Messages tab is empty, the value is 0.
Selected | Clear | The value specified on the Messages tab. If the Alarm Identifier column on the Messages tab is empty, the value is 0. | Not updated
Clear | Selected | 0 | Not updated
Clear | Clear | 0 | Not updated