8 PA-DIM Variable Extensions ToC Previous Next

8.16 DiscreteSignalVariableType ToC Previous Next

8.16.2 Definition ToC Previous Next index

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
BrowseName DiscreteSignalVariableType
IsAbstract False
ValueRank −2 (−2 = ‘Any’)
DataType BaseDataType

Subtype of DiscreteItemType defined in OPC 10000-8

References NodeClass BrowseName DataType TypeDefinition Modelling Rule
0:HasComponent Variable ActualValue 0:BaseDataType 0:BaseDataVariableType 0:Optional
0:HasComponent Variable SimulationValue 0:BaseDataType 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 3:0112/2///61987#ABN644#001
SimulationValue 0:HasDictionaryEntry 0:True 3:0112/2///61987#ABN613#001
SimulationState 0:HasDictionaryEntry 0:True 3:0112/2///61987#ABN611#001

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