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