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Transition process alarms are generated by changing the states of I/O Tag or Eval Tag type objects. This type of process alarms are alarm is an acknowledgement-required onesone.
The status diagram of transition process alarms is in the following figure.
If the condition to start the alarm is met then the alarm flag, a flag of unacknowledged alarm and the type of alarm which that has started, are set to a particular object value. Both the flags are cancelled after the alarm acknowledgement and the type of the alarm is set to the NoAlarm state.
Note: Only status process alarms are evaluated for a default value of I/O Tags. Transition alarms are ignored.