Action and warning alarms

Action and warning alarms


Action and warning alarms

Action alarms initiate automatic actions in addition to alarm annunciation in CCR. AHH and ALL are action alarm outputs.

Warning alarms warns the operator about an undesired process upset. Warning alarm enables the operator to perform corrective actions, but no automatic action is initiated. On SCD diagrams warning alarms are indicated as WH and WL symbols.


SCD alarms

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