Shelve alarms

Operators can temporarily shelve selected alarms from the list of an Alarm Control’s active alarms. A shelved alarm is suppressed and removed from the list of active alarms. Typically, operators shelve lower severity nuisance alarms because they provide little diagnostic value and interfere with the operator’s ability to manage a plant process.

An alarm is shelved for a specified period. After the period ends, alarms are automatically unshelved and appear again in the list of active alarms. Operators can also manually unshelve an alarm before the end of the specified shelved period.

By default, Medium and Low severity alarms are enabled for shelving. Critical and High severity alarms are not because of the potential risk of shelving and ignoring alarms that represent serious operating states. For more information about enabling shelving based on alarm severity, see "Enabling Alarm Shelving" in the Application Server Help.