The TwoStateDiscreteSignalVariableType is used for process variables, that can have two states, and illustrated in Figure 8. It is formally defined in Table 42.
Table 42 - TwoStateDiscreteSignalVariableType
|
Attribute |
Value |
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|
BrowseName |
TwoStateDiscreteSignalVariableType |
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|
IsAbstract |
False |
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|
ValueRank |
−2 (−2 = ‘Any’) |
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|
DataType |
Boolean |
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|
References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
Modelling Rule |
|
Subtype of TwoStateDiscreteType defined in OPC 10000-8 |
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|
0:HasComponent |
Variable |
ActualValue |
0:Boolean{Any} |
0:BaseDataVariableType |
0:Optional |
|
0:HasComponent |
Variable |
SimulationValue |
0:Boolean{Any} |
0:BaseDataVariableType |
0:Optional |
|
0:HasComponent |
Variable |
SimulationState |
0:Boolean |
0:BaseDataVariableType |
0:Optional |
|
0: HasDictionaryEntry |
Object |
|
0:IrdiDictionaryEntryType |
|
|
ActualValue: ABN645#001 defines parameter indicating the binary value of a not simulated binary process variable of a device.
SimulationValue: ABN632#001 parameter indicating the simulated value of a binary variable.
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 43 - TwoStateDiscreteSignalVariableType 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 |