Event monitor

The server process handling alarms and events are called the event monitor and has the name
rt_emon. It's configured with a MessageHandler object in the node hierarchy.

Configurations in the MessageHandler objects are for example EventListSize, that is the number
of internally stored events, and EventLogSize that states the size of the event log, i e the
number ov events stored on disk.

The event monitor scans all sup objects and send information about alarm and events to different
outunits, for example the alarm and event list. When an outunit is started, all events in the
internal list is sent to the outunit, and the new events are sent when when they occur. Also
a status message is sent whit all active or unacknowledged alarms to ensure that the alarm
list is correctly updated.