Grass Valley iControl V.6.02 - Manual (Page 322)

Alarms in iControl
Alarm Operational Modes
312
When iControl displays a virtual alarm’s latched or acknowledged component, it determines
the status (or color) by comparing its sub-alarms according to a pessimistic logic table.
Alarm Operational Modes
iControl has three operational modes that are used to temporarily stop alarms from reporting
errors: the In maintenance mode, the Offline mode, and the Snooze mode.
Offline
The Offline mode is generally employed in the execution of an automated task. Setting alarms
to Offline mode has a similar effect, except that each latch is also reset when alarms are put
back online.
Consider the case where several TV channels go “off air” every morning between 02:00 a.m.
and 06:00 a.m. A schedule could be established (see note below), or a script could be created,
to turn off the alarm display for these channels automatically during the specified intervals.
Such a schedule or script would set the appropriate alarms to Offline mode at 02:00, to avoid
having iControl report a sudden flood of alarms due to loss of signal.
Similarly, the schedule/script would put the alarms back online at 06:00, at which point, with
the signals restored, the alarms would normally all return to green. Anything that happened
during the offline period, however, would not be visible in iControl, because each latch is also
reset when an alarm is put back online.
In Maintenance
The In Maintenance mode is generally employed in the execution of a manual task.
Note: Alarms can be set to In maintenance or Offline mode according to a
predetermined schedule using the Alarm Scheduling feature (see
"Alarm
Scheduling" , on page 332).