OPC Unified Architecture – Part 5: Information Model
7.21 VectorType
This abstract VariableType is used as base to define multi-dimensional vectors. Subtypes need to define the concrete number of dimensions. It reflects the semantic of its DataType, defined in 12.23. Subtypes shall expose the structure of their structured DataTypes as Variables. Additionally, it can define a unit for each dimension of the vector (PropertyVectorUnit). The VariableType is formally defined in Table 91.
Table 91 – VectorType Definition
Attribute
Value
BrowseName
VectorType
IsAbstract
True
ValueRank
Scalar
DataType
Vector
References
NodeClass
BrowseName
DataType
TypeDefinition
Modelling Rule
Subtype of the BaseDataVariableType defined in 7.4
HasProperty
Variable
VectorUnit
EUInformation
PropertyType
Optional
Conformance Units
Base Info Spatial Data
VectorUnit defines the unit of each dimension of the vector. The DataTypeEUInformation is defined in OPC 10000-8. Note that the PropertyEngineeringUnits is intentionally not used, as it would have to define the engineering unit of the full vector, not its individual dimensions.