The driver routes an OPC UA event from the Niagara alarms to the OpcUaServerAlarmRecipient via the linked OpcUaServerAlarmClass.  Alarms routed to the recipient must come from a control point that also contains a server proxy extension. The OpcUaServerProxyExt relates the OpcUaServerAlarmRecipient to a UA Node Id. This UA Node Id is a property of the OpcUaServerProxyExt.

The OpcUaServerAlarmRecipient also has an Opc Ua Severity property.  This property maps the alarm's Alarm State to the OPC UA alarm severity index.

The following image shows the default Opc Ua Severity mapping.