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7.24 ControlType ObjectType Definition ToC Previous Next

The ControlType provides Variables for precise control of a Pump according to DIN IEC 60050-351 and is formally defined in Table 55.

Table 55 – ControlType Definition

Attribute Value        
BrowseName ControlType        
IsAbstract False        
References Node Class BrowseName DataType TypeDefinition Other
Subtype of the 2:FunctionalGroupType defined in OPC 10000-100, i.e. inheriting the InstanceDeclarations of that Node.          
0:HasComponent Variable CommandVariable 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable ControlDifferenceVariable 0:Double 0:BaseAnalogType O, RO
0:HasComponent Variable ControlledVariable 0:Double 0:BaseAnalogType O, RO
0:HasComponent Variable ControllerOutputVariable 0:Double 0:BaseAnalogType O, RO
0:HasComponent Variable DeadTime 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable DerivativeActionCoefficient 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable FeedbackVariable 0:Double 0:BaseAnalogType O, RO
0:HasComponent Variable FinalControlledVariable 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable IntegralActionCoefficient 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable ManipulatedVariable 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable OperatingMode 0:String 0:DataItemType O, RW
0:HasComponent Variable ProportionalActionCoefficient 0:Double 0:BaseAnalogType O, RW
0:HasComponent Variable ReferenceVariable 0:Double 0:BaseAnalogType O, RW

The InstanceDeclarations of the ControlType have additional Attributes defined in Table 56. The Variables and the associated Descriptions are based on the standard DIN IEC 60050-351.

Table 56 – ControlType Attribute values for child Nodes

BrowsePath Value Attribute Description Attribute
CommandVariable   Variable quantity, which is not influenced by the control but is introduced into the control system from outside with the aim of making the final controlled variable follow it in a given relationship
ControlDifferenceVariable   Difference between the reference variable and the feedback variable
ControlledVariable   Output variable of the controlled system that will be acted upon by one or more manipulated variables
ControllerOutputVariable   Output variable of the controlling element, which is deducted from the control difference variable and is also the input variable of the actuator
DeadTime   In a dead-time element the duration of the time interval by which the output variable is shifted relative to the input variable
   DeadTime
   0:EngineeringUnits
NamespaceUri: http://www.opcfoundation.org/UA/units/un/cefact
UnitId: 5457219
DisplayName: s
Description: second [unit of time]
 
DerivativeActionCoefficient   For a derivative element, the quotient of the value of the output variable to the value of the time derivative of the input variable
FeedbackVariable   Variable quantity, which represents the controlled variable and is returned to the comparing element
FinalControlledVariable   Variable quantity which has, or combination of variable quantities which have, to be influenced by the control
IntegralActionCoefficient   For an integral element, the quotient of the time derivative of the output variable to the fixed value of the input variable
ManipulatedVariable   Output variable of the controlling system, which is also an input variable of the controlled system
OperatingMode   Characterization of the way and the extent to which the human operator intervenes in the control equipment
ProportionalActionCoefficient   For a proportional element, the quotient of the variation of the output variable to the corresponding variation of the input variable
ReferenceVariable   Input variable to a comparing element in a controlling system, which sets the desired value of the controlled variable and is deducted from the command variable

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