8.18 TwoStateDiscreteControlVariableType
The TwoStateDiscreteControlVariableType is a subtype of the TwoStateDiscreteSignalVariableType. It is formally defined in Table 267.
| Attribute | Value | ||||
| BrowseName | TwoStateDiscreteControlVariableType | ||||
| IsAbstract | False | ||||
| ValueRank | −2 (−2 = ‘Any’) | ||||
| DataType | Boolean | ||||
| References | NodeClass | BrowseName | DataType | TypeDefinition | Other |
|---|---|---|---|---|---|
| Subtype of TwoStateDiscreteSignalVariableType defined in 8.15, i.e. inheriting the InstanceDeclarations of that Node | |||||
| 0:HasComponent | Variable | Setpoint | 0:Boolean{Any} | 0:TwoStateDiscreteType | M |
| 0:HasComponent | Variable | OperatingDirection | 0:UInt32 | 0:MultiStateDictionaryEntryDiscreteType | M |
| 0:HasComponent | Variable | FaultState | 0:Boolean | 0:TwoStateDiscreteType | O |
| 0:HasDictionaryEntry | Object | 3:0112/2///61987#ABP541#002 | 0:IrdiDictionaryEntryType | ||
| Conformance Units | |||||
|---|---|---|---|---|---|
| PA-DIM TwoStateDiscreteControlVariable | |||||
| PA-DIM TwoStateDiscreteControlVariable FaultState |
This type defines control which is used for two state discrete output.
Setpoint: ABP542#001 defines in a control loop, the two-state target value the process value is intended to assume.
OperatingDirection: ABD740#003 defines output change to a given input signal, for example direct or reverse.
FaultState: ABP543#002 defines replacement value of a two-state output in the case of a failure.
ABP541#001 defines two-state readback value in a control loop. The components of TwoStateDiscreteControlVariableType have additional references which are defined in Table 268.
| SourceBrowsePath | Reference Type | Is Forward | TargetBrowsePath |
| Setpoint | 0:HasDictionaryEntry | True | 3:0112/2///61987#ABP542#002 |
| OperatingDirection | 0:HasDictionaryEntry | True | 3:0112/2///61987#ABD740#003 |
| FaultState | 0:HasDictionaryEntry | True | 3:0112/2///61987#ABP543#002 |
The child Nodes of the TwoStateDiscreteControlVariableType have additional Attribute values defined in Table 269.
| BrowsePath | Value Attribute |
| Setpoint | False |
| FALSE | |
| TRUE | |
| OperatingDirection | 0 |
| ns=3;s=0112/2///61987#ABL147#001 | |
| direct | |
| FaultState | False |
| FALSE | |
| TRUE |