Option

Description

Script Execution

Parallel

Runs a script each time an Event is invoked. More than one copy of the script may run at a time. You must use critical sections to control access to resources.

Sequential

(Default) When an Event is triggered, if an existing instance of the event is still executing the script will be queued to start after the current script is done.

Maximum Queue

With sequential a maximum queue size is specified. In this case when more the 20 events are queued, the oldest will be discarded.

Generate Alarm on Overflow

(Default) If the sequential queue overflows, check to generate an $EM_QUEUE alarm when the queue overflows.

Note: If your event is an alarm event, generating an alarm may cause your event to trigger again and generate another alarm. This will cause a circular cycle of alarms.

Log Error on Overflow

(Default) If the sequential queue overflows, check to generate an message in the status log.

Step 3. Create an event.