The DeviceHealthDiagnosticAlarmTypeis a specialization of the InstrumentDiagnosticAlarmTypeintended to represent abnormal device conditions as defined by NAMUR NE 107. This type can be used in filters for monitored items. Only subtypes of this type will be used in actual implementations. The Alarmbecomes active when the device condition is abnormal. It is formally defined in Table 34.

Table 34– DeviceHealthDiagnosticAlarmType definition

Attribute

Value

BrowseName

DeviceHealthDiagnosticAlarmType

IsAbstract

True

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

Subtype of the 0:InstrumentDiagnosticAlarmType defined in OPC 10000-9.

Conformance Units

DI HealthDiagnosticsAlarm

Conditionsof subtypes of DeviceHealthDiagnosticAlarmTypebecome active when the device enters the corresponding abnormal state.

The Messagefield in the Eventnotification shall be used for additional information associated with the health status (e.g. the possible cause of the abnormal state and suggested actions to return to normal).

A Device may be in more than one abnormal state at a time in which case multipleConditionswill be active.