4.12.2 DeviceHealthDiagnosticAlarmType
The DeviceHealthDiagnosticAlarmType is a specialization of the InstrumentDiagnosticAlarmType intended 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 Alarm becomes active when the device condition is abnormal. It is formally defined in Table 40.
| Attribute | Value | ||||
| BrowseName | 1:DeviceHealthDiagnosticAlarmType | ||||
| IsAbstract | True | ||||
| References | NodeClass | BrowseName | DataType | TypeDefinition |
Modelling
Rule |
|---|---|---|---|---|---|
| Subtype of the 0:InstrumentDiagnosticAlarmType defined in OPC 10000-9. | |||||
| Conformance Units | |||||
|---|---|---|---|---|---|
| DI HealthDiagnosticsAlarm |
Conditions of subtypes of DeviceHealthDiagnosticAlarmType become active when the device enters the corresponding abnormal state.
The Message field in the Event notification 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 can be in more than one abnormal state at a time in which case multiple Conditions will be active.