This ReferenceType is a subtype of the Organizes ReferenceType defined in OPC 10000-5. Its representation in the AddressSpace is specified in Table 24.
Table 24 – HasExternalVar ReferenceType
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Attributes |
Value |
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|
BrowseName |
HasExternalVar |
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|
InverseName |
ExternalVarOf |
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|
Symmetric |
False |
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|
IsAbstract |
False |
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|
References |
NodeClass |
BrowseName |
Comment |
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Subtype of Organizes ReferenceType defined in OPC 10000-5 |
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The HasExternalVar ReferenceType is a concrete ReferenceType and can be used directly.
The semantic of this ReferenceType is to reference components of a Ctrl Program Organization Unit declared with the key word VAR_EXTERNAL.
The SourceNode of References of this type shall be a subtype of CtrlProgramOrganizationUnitType or an instance of one of its subtypes.
The TargetNode of this ReferenceType shall be a Variable or an Object of the ObjectType CtrlFunctionBlockType or one of its subtypes.