9.2 MeasuredItemType
9.2.1 Overview
The VariableType defines the general characteristics of a MeasuredItem. A MeasuredItem is an OPC UA Variable that represents a measured value. It adds some Properties that describe the measurement parameters. It is formally defined in Table 142 and is leaned to the 0:AnalogItemType from OPC 10000-8.
9.2.2 MeasuredItemType Definition
| Attribute | Value | ||||
| BrowseName | MeasuredItemType | ||||
| IsAbstract | False | ||||
| ValueRank | -2 | ||||
| DataType | BaseDataType | ||||
| References | NodeClass | BrowseName | DataType | TypeDefinition | ModellingRule |
|---|---|---|---|---|---|
| Subtype of the DataItemType | |||||
| 0:HasProperty | Variable | 0:EngineeringUnits | 0:EUInformation | 0:PropertyType | Mandatory |
| 0:HasProperty | Variable | 0:EURange | 0:Range | 0:PropertyType | Mandatory |
| 0:HasProperty | Variable | 0:InstrumentRange | 0:Range | 0:PropertyType | Optional |
9.2.3 MeasuredItemType Description
EngineeringUnits specifies the units for the DataItems value (e.g. DEGC, hertz, seconds). The 0:EUInformation type is specified in OPC 10000-8. If the DataType is a WeightItemType or a PrintableWeightItemType it is the unit of net, gross and tare.
EURange is specified like the EURange of the 0:AnalogItemType in OPC 10000-8. If the DataType is a WeightItemType or a PrintableWeightItemType it is the range of net, gross and tare.
InstrumentRange is specified like the EURange of the 0:AnalogItemType in OPC 10000-8.