Event Type mapping – OPC Unified Architecture

D.3.3 Event Type mapping

Since all Alarms and Conditions Events belong to a subtype of BaseEventType, the A&E COM UA Proxy maps the subtype as received from the UA A & C Server to one of the three A&E Event types: Simple, Tracking and Condition. Figure D.2 shows the mapping as follows:

Those A & C Events which are of subtype AuditEventType are marked as A&E Event type Tracking.
Those A & C Events which are ConditionType are marked as A&E Event type Condition.
Those A & C Events which are of any subtype except AuditEventType or ConditionType are marked as A&E Event type Simple.

Figure D.2 – Mapping UA Event Types to COM A&E Event Types

Note that the Event type mapping described above also applies to the children of each subtype.