The VariableType defines the general characteristics of a TargetItem. A TargetItem is a OPC UA variable that represents a target value. It is formally defined inTable 136.

image083.png

Figure 67 – Overview TargetItemType

Table 136 – TargetItemType Definition

Attribute

Value

BrowseName

TargetItemType

IsAbstract

False

ValueRank

-2

DataType

0:Number

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

Subtype of the AnalogItemType

0:HasComponent

Variable

MinusTolerance

0:Number

AnalogItemType

Optional

0:HasComponent

Variable

PlusTolerance

0:Number

AnalogItemType

Optional

0:HasProperty

Variable

AllowedEngineeringUnits

0:EUInformation[]

0:PropertyType

Optional

MinusTolerance contains the lower relative limit of the value in TargetItemType. This may be a percentage or a relative concrete value.

PlusTolerance contains the upper relative limit of the value in TargetItemType. This may be a percentage or a relative concrete value.

AllowedEngineeringUnits contains an array of engineering units that can be handled by the OPC UA server.