You can get additional information on alarms by clicking on the object name.

The Error explanation window opens.

Alarms caused by different reasons can overlap, creating common alarm periods for the object. In the table, they are shown in gray. If an alarm is still active, its Ended column is empty.

If there are too many alarms, not more than 200 alarms are shown in the Error explanation window. To view other events, use the navigation buttons and the additional tool View from date in the lower-right corner.