Selective audio alarms for critical equipments in ABB 800xA DCS
I want to Know whether it is possible to create audio alarms for selective critical equipments in ABB 800xa DCS system.
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Please read about Audible Alarm in the 800xA Configuration User's Guide,
3BDS011222-510. E.g. pages 96 thru 98 in the most recent revision (F).
Audible alarms are tied to Alarm Priority level (1 being the highest). Priority is set in 800xA based on the Alarm Priority Mapping which translates the controller/PLC's OPC AE Severity (1-1000, 1000 being the highest) into an Alarm Priority level. Each family of OPC AE servers can be given a unique / custom mapping of Severity->Priority.
The Audible Alarm Configuration is used to define how and if a sound file shall be played for a given priority.
The Audible Alarm Workplace Configuration is used to define if a workplace shall play sounds and if silencing shall propagate to all workplaces or not.
1. Define OPC AE Severity on the objects (higher is more important)
2. Map OPC AE Severity to Alarm Priority (lower is more important)
3. Define what Audible Alarm (that shall play once or continously) for each Alarm Priority
4. Enable Audible Alarm for the workplace
5. Ensure the Audible Alarm toolbar is put in the application bar the workplace.
I believe a default system have all but step 4 configured to some degree for at least one of the preconfigured workplaces. Step 5 is easily forgotten.
Step 1. can be made in many ways in 800xA but the most generic and easy to understand is if the alarm is made "important" already in the controller (i.e. be given a high severity).
For critical alarm indication, we recommend to also configure External Alarm, a feature that may be used to drive a controller/PLC's IO to enable a strobe light, horn, siren, etc. External Alarm will fire even if all workplaces have been shut down or the speaker has been muted or its volume turned down too low.