8 PA-DIM Variable Extensions ToC Previous Next

8.14 TwoStateDiscreteSignalVariableType ToC Previous Next index

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
BrowseName TwoStateDiscreteSignalVariableType
IsAbstract False
ValueRank −2 (−2 = ‘Any’)
DataType Boolean

Subtype of TwoStateDiscreteType defined in OPC 10000-8

References NodeClass BrowseName DataType TypeDefinition Modelling Rule
0:HasComponent Variable ActualValue 0:Boolean 0:BaseDataVariableType 0:Optional
0:HasComponent Variable SimulationValue 0:Boolean 0:BaseDataVariableType 0:Optional
0:HasComponent Variable SimulationState 0:Boolean 0:BaseDataVariableType 0:Optional
0:HasDictionaryEntry Object 3:0112/2///61987#ABN635#001     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 3:0112/2///61987#ABN645#001
SimulationValue 0:HasDictionaryEntry 0:True 3:0112/2///61987#ABN632#001
SimulationState 0:HasDictionaryEntry 0:True 3:0112/2///61987#ABN611#001

Previous Next