OPC Unified Architecture – Part 5: Information Model
7.25 OrientationType
This abstract VariableType is used as base to define multi-dimensional orientations. Subtypes need to define the concrete number of dimensions. It reflects the semantic of its DataType, defined in 12.27. Subtypes shall expose the structure of their structured DataTypes as Variables. Additionally, it can define a unit for the orientation angles (PropertyAngleUnit). The VariableType is formally defined in Table 95.
Table 95 – OrientationType Definition
Attribute
Value
BrowseName
OrientationType
IsAbstract
True
ValueRank
Scalar
DataType
Orientation
References
NodeClass
BrowseName
DataType
TypeDefinition
Modelling Rule
Subtype of the BaseDataVariableType defined in 7.4.
HasProperty
Variable
AngleUnit
EUInformation
PropertyType
Optional
Conformance Units
Base Info Spatial Data
AngleUnit defines the unit of each dimension of the orientation. 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 cartesian coordinates, not its individual dimensions