The DeltaV OPC Alarms and Events Server allows client applications to collect every type of event supported by the DeltaV Alarms and Events subsystem:
Process alarms
Status changes
Operator tracking messages
Operator manual action requests
Batch Historian events
Campaign Manager events
Batch Executive events
Operator annotations
Batch Historian, Batch Executive and Campaign Manager events logged in the Event Chronicle (Ejournal) identify limited significant events such as batch start and completion times.
Rather than list the actual events (such as thousands of individual alarm conditions) to which they want to subscribe, client applications subscribe to events through the use of event filters such as event type, area source, or severity. The DeltaV OPC Alarms and Events Server supports event filters specified in the OPC Alarms and Events Specification. Client applications can collect any or all alarms and events based on the filters they create. For example, one client might subscribe to all setpoint changes in a particular plant area and another might subscribe to all HiHi alarms within a plant area.