The DiscreteSignalVariableType is a subtype of the DiscreteItemType defined in OPC 10000-8 and adds optionally ActualValue and SimulationValue components. It is formally defined in Table 46.
Table 46 - DiscreteSignalVariableType
|
Attribute |
Value |
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|
BrowseName |
DiscreteSignalVariableType |
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|
IsAbstract |
False |
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|
ValueRank |
−2 (−2 = ‘Any’) |
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|
DataType |
BaseDataType |
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|
References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
Modelling Rule |
|
Subtype of DiscreteItemType defined in OPC 10000-8 |
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|
0:HasComponent |
Variable |
ActualValue |
0:BaseDataType{Any} |
0:BaseDataVariableType |
0:Optional |
|
0:HasComponent |
Variable |
SimulationValue |
0:BaseDataType{Any} |
0:BaseDataVariableType |
0:Optional |
|
0:HasComponent |
Variable |
SimulationState |
0:Boolean |
0:BaseDataVariableType |
0:Optional |
ActualValue: ABN644#001 parameter indicating the discrete value of the not simulated discrete process variable of a device.
SimulationValue: ABN613#001 defines parameter indicating the simulated discrete value of a variable, which can have multiple states.
SimulationState is defined by IRDI as ABN611#001 which states “defines parameter indicating the state of simulation” and used also to enable/disable simulation.
Table 47 - DiscreteSignalVariableType Additional References
|
Source Path |
Reference Type |
Is Forward |
Target Path |
|
ActualValue |
0:HasDictionaryEntry |
0:True |
|
|
SimulationValue |
0:HasDictionaryEntry |
0:True |
|
|
SimulationState |
0:HasDictionaryEntry |
0:True |