Grass Valley iControl V.6.02 - Manual (Page 326)

Alarms in iControl
Virtual Alarm Operational Modes
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Virtual Alarm Operational Modes
Virtual alarms don’t have their own operational modes. They reflect the operational modes of
their sub-alarms (just as they do for current, latched and acknowledgement statuses). If a sub-
alarm has an operational mode set, then the virtual alarm inherits it.
If you select a virtual alarm and then set an operational mode on it, this setting is applied to all
of its sub-alarms. The normal rules of inheritance then apply, so that the status of the virtual
alarm ends up reflecting the mode setting of its sub-alarms.
In the case of virtual alarms, such as in a Source selector panel, the overall status icons for
suppressed alarms reflect their real status, but in a darker shade, as shown below.
An operator can right-click the status icon for any alarm (including virtual alarms) to snooze
the alarm or manually activate or deactivate its operational mode, through the shortcut menu.
In the case of a virtual alarm, the selected mode will be applied to all of the constituent sub-
alarms.
Alarm Propagation & Operational Modes
The following cases describe how a system could behave upon activation of an operational
mode, depending on the logic table used by the virtual alarm.
Example: Sub-alarm is ‘In maintenance’ (or ‘Offline’), overall status green
The status icon for the sub-alarm will appear in a darker shade and the status will be
propagated to the overall (virtual) alarm. The status icon for the overall alarm will be shaded
accordingly.
Example: Sub-alarm is ‘In maintenance’ (or ‘Offline’), overall status red
The status icon for the sub-alarm will appear in a darker shade and the status will be
propagated to the overall alarm. If there is another red sub-alarm, the overall alarm will stay
red. Otherwise, the overall alarm will reflect the state of the sub-alarm that is in
maintenance mode.
Example: Overall (virtual) alarm is ‘In maintenance’ (or ‘Offline’)
When an overall alarm is set to maintenance mode, all of its constituent sub-alarms are also
set to maintenance mode and their status icons are shaded accordingly.
IMPORTANT: System behavior
You cannot directly edit the Inverted mode of a virtual alarm or alarm folder; you
can only change a virtual alarm’s Inverted mode indirectly: by changing the
Inverted mode of one or more of its primitive alarms.