Disable alarms

You can disable or enable all alarms of a tag at once using the .AlarmEnabled or AlarmDisabled dotfields. For an alarm that has sub-states, each sub-state can be individually disabled. For example, an analog value alarm can have Hi enabled and HiHi disabled.

During run time, the Alarm Provider does not generate alarms for an alarm or sub-state that is disabled. Changes to whether an alarm is disabled or enabled can be made at run time.

Whenever an alarm transitions from disabled to enabled, the checking logic determines whether the item should be put in the alarmed state by the Alarm Provider.

If an alarm becomes disabled or actively inhibited while the item is in an alarmed state, the item will be forced to a different (valid) state. What that state should be depends upon which states are available and whether they have also been disabled. This activity is handled by the Alarm Provider according to the type of alarm and limit values.