There may be an occasion when you need to temporarily prevent
an alarm from sounding. The purpose of theAlarm Inhibit property is to prevent unintended alarms, such as in after-hours
situations where a piece of equipment is turned off.
- Display the property sheet for the alarm extension.
- Set Alarm Inhibit to true and set the Inhibit Time.
- Set the Time Delay that the alarm
condition must exist before the alarm generates.
Note: Time Delay does not affect alarms generated by a fault.
There is no delay when transitioning in or out of a Fault generated
alarm.
Time delays apply to properties that transition both in and out of alarm states. Therefore, an alarm status
may continue to display as Offnormal (for example) for a time (equal
to the Time Delay) after the value returns to Normal. The Time Delay
is the minimum time that a normal condition must exist before the
object comes out of alarm.
Note: Typically, when both Alarm Delay and Alarm Inhibit properties
are used, Time Delay is less (shorter) than Alarm Inhibit.