For all VariableTypesspecified in this specification, the Attributesnamed in Table 6shall be set as specified in the table. The definitions for the Attributescan be found in OPC 10000-3.
Table 6– Common VariableType Attributes
|
Attributes |
Value |
|
Value |
Optionally a vendor-specific default value can be provided |
|
ArrayDimensions |
If the ValueRankdoes not identify an array of a specific dimension (i.e. ValueRank<= 0) the ArrayDimensionscan either be set to null or the Attributeis missing. This behaviour is vendor-specific. If the ValueRankspecifies an array of a specific dimension (i.e. ValueRank> 0) then the ArrayDimensions Attributeshall be specified in the table defining the VariableType. The concrete array length is contained in the delivered Value. Therefore this information is only relevant for write access to the VariableType Valueif the array has a fixed length. |