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.