Acknowledgment, Alarm acknowledgment behavior in channel selectors, Alarm acknowledgment scenarios – Grass Valley iControl V.4.43 User Manual
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alarms. Resetting a client-side latch for an overall (virtual) alarm has no effect on the latches of
associated sub-alarms (these must be reset one by one).
Acknowledgment
This is the component of an alarm that reflects an operator’s response. If an alarm changes to
an error status, its acknowledgment component (if it is visible) will also change color. When an
operator acknowledges the alarm (by clicking on a button or choosing a menu item), the
acknowledgment component turns green. If, however, the issue that initially triggered the
alarm is not resolved within a certain period of time, the acknowledgment component will
once again change color to attract the operator’s attention.
Alarm acknowledgment can provide visual feedback to operators at different locations. An
alarm acknowledgment by one operator will be seen by all operators viewing the same
iC Web page, and is usually an indication that somebody is attempting to resolve the cause of
an alarm.
iC Web has a feature that allows operators to have all alarms on a page blink when an
acknowledgment is required.
Acknowledging a virtual alarm automatically acknowledges its constituent sub-alarms. Sub-
alarms can also be acknowledged individually.
Alarm Acknowledgment Behavior in Channel Selectors
A channel selector is a Web page element consisting of a group of buttons used to select
individual channels. When one channel in a group has an alarm status that is not normal, the
group background turns red, and the affected individual channel button flashes red until the
alarm is acknowledged. If the affected individual channel clears before being acknowledged,
the group background changes to a color that represents normal status, and the individual
channel button flashes green.
Alarm Acknowledgment Scenarios
Here is an example of a simple alarm acknowledgment scenario.
1. An alarm has an initial status of normal (green).
2. A critical error occurs, causing the alarm’s current, latched and acknowledgment states to
change from green to red.
3. After a few seconds, an operator acknowledges the alarm, which changes the
acknowledgment state back to green. Other operators can see that the error is still present,
but that someone is working on it.
4. If the problem is fixed before the acknowledgment period expires, the alarm’s current state
reverts to green (the acknowledgment state remains green).
5. If the problem is not fixed before the acknowledgment period expires, the acknowledgment
state reverts to red.
Here is an example of a recurring alarm acknowledgment scenario.
Note: Alarm acknowledgment is only visible in the GSM Alarm Browser when Show
status details is selected (see