You can configure digital alarms to activate based on the state of one or two digital variables. The alarm becomes active when the triggering condition spans the duration of a specified delay period.
The variables configured for a digital alarm are polled at the rate set by the Citect.ini parameter [Alarm]ScanTime. If an alarm state changes, notification will occur the next time the variables are polled. Be aware that the time associated with the alarm state will represent the time the variable was polled, not the actual time the alarm condition occurred.
To configure a digital alarm: