VariableTypes – OPC UA for Computerized Numerical Control (CNC) Systems – for CNC Systems: OPC UA Information Model

3.3.3.4 VariableTypes

For all VariableTypes specified in this specification, the Attributes named in Table 6 shall be set as specified in the table.

Table 6 – Common VariableType Attributes

Attributes

Value

Value

Optionally a vendor-specific default value can be provided

ArrayDimensions

If the ValueRank does not identify an array of a specific dimension (i.e. ValueRank <= 0) the ArrayDimensions can either be set to null or the Attribute is missing. This behaviour is vendor-specific.

If the ValueRank specifies an array of a specific dimension (i.e. ValueRank > 0) then the ArrayDimensions Attribute shall be specified in the table defining the VariableType.