The ControlVariableType is a subtype of the AnalogSignalVariableType. It is formally defined in Table 181.
Table 181 – ControlVariableType definition
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Attribute |
Value |
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|
BrowseName |
ControlVariableType |
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|
IsAbstract |
False |
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ValueRank |
−2 (−2 = ‘Any’) |
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|
DataType |
Float |
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|
References |
NodeClass |
BrowseName |
DataType |
TypeDefinition |
Other |
|
Subtype of AnalogSignalVariableType defined in 8.2, i.e. inheriting the InstanceDeclarations of that Node |
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|
0:HasComponent |
Variable |
Setpoint |
0:Float{Any} |
0:BaseAnalogType |
M |
|
0:HasComponent |
Variable |
OperatingDirection |
0:UInt32 |
0:MultiStateDictionaryEntryDiscreteType |
M |
|
0:HasComponent |
Variable |
ActuatorType |
0:UInt32 |
0:MultiStateDictionaryEntryDiscreteType |
M |
|
0:HasDictionaryEntry |
Object |
|
0:IrdiDictionaryEntryType |
|
|
|
Conformance Units |
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|
PA-DIM ControlVariable |
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This type defines control which is used e.g. for an actuator, positioner.
ABJ683#001 defines parameter indicating the current output value of the block (READBACK_VALUE).
ControlVariable value provides the position of the final control element within the travel span (between OPEN and CLOSE position). The unit of this value is provided by the EngineeringUnits property.
Setpoint: ABN607#002 defines set point for a valve position.
OperatingDirection: ABD740#002 defines output change to a given input signal. For mapping rules see 8.2.4.
ActuatorType: ABD742#002 defines classification of a positioner according to the actuator for which it can be used. For mapping rules see 8.2.4.
The components of ControlVariableType have additional references which are defined in Table 182.
Table 182 – ControlVariableType additional References
|
SourceBrowsePath |
Reference Type |
Is Forward |
TargetBrowsePath |
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|
Setpoint |
0:HasDictionaryEntry |
True |
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|
0:HasDictionaryEntry |
True |
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|
OperatingDirection |
0:HasDictionaryEntry |
True |
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|
ActuatorType |
0:HasDictionaryEntry |
True |
The child Nodes of the ControlVariableType have additional Attribute values defined in Table 183.
Table 183 – ControlVariableType additional Attribute values for child Nodes
|
BrowsePath |
Value Attribute |
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|
Setpoint |
0.0 |
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|
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefactUnitId: 20529DisplayName: % or pctDescription: percent |
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|
OperatingDirection |
0 |
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|
ns=3;s=0112/2///61987#ABL147#001 |
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|
direct |
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|
ActuatorType |
0 |
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|
ns=3;s=0112/2///61987#ABN145#001 |
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|
sliding-stem linear |