The HasEngineeringUnitDetails is a concrete ReferenceType and can be used directly. It is a subtype of NonHierarchicalReferences.
The semantics of this ReferenceType is to link a Variable with EUInformation DataType to its more detailed AddressSpace representation Instance of the ServerUnitType ObjectType.
The SourceNode of References of this type shall be a Variable with EUInformation DataType.
The TargetNode of this ReferenceType shall be an Instance of the ServerUnitType ObjectType.
The Reference has to change if the value (the concrete EngineeringUnit) is changing. Clients can subscribe to the value and then need to rebrowse.
The HasEngineeringUnitDetails is formally defined in Table 44.
Table 44 – HasEngineeringUnitDetails definition
|
Attributes |
Value |
||
|
BrowseName |
HasEngineeringUnitDetails |
||
|
InverseName |
EngineeringUnitDetailsOf |
||
|
Symmetric |
False |
||
|
IsAbstract |
False |
||
|
References |
NodeClass |
BrowseName |
Comment |
|
Subtype of NonHierarchicalReferences defined in OPC 10000-5. |
|||
|
Conformance Units |
|||
|
Data Access Quantities Base |
|||
The HasQuantity is a concrete ReferenceType and can be used directly. It is a subtype of NonHierarchicalReferences.
The semantics of this ReferenceType is to link a Variable with EUInformation DataType to an Instance of the QuantityType ObjectType.
The SourceNode of References of this type shall be a Variable with EUInformation DataType (typically the EngineeringUnits Property).
The TargetNode of this ReferenceType shall be an Instance of the QuantityType ObjectType.
The HasQuantity is formally defined in Table 45.
Table 45 – HasQuantity definition
|
Attributes |
Value |
||
|
BrowseName |
HasQuantity |
||
|
InverseName |
QuantityOf |
||
|
Symmetric |
False |
||
|
IsAbstract |
False |
||
|
References |
NodeClass |
BrowseName |
Comment |
|
Subtype of NonHierarchicalReferences defined in OPC 10000-5. |
|||
|
Conformance Units |
|||
|
Data Access Quantities Base |
|||