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 in Table 136.
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 0:AnalogItemType |
|||||
|
0:HasComponent |
Variable |
MinusTolerance |
0:Number |
0:AnalogItemType |
Optional |
|
0:HasComponent |
Variable |
PlusTolerance |
0:Number |
0: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.