Supported Attributes

The following table provides a list of the attributes supported by the OPC Classic HDA collector.

Historian Property TypeOPC Classic HDA collector AttributesData TypeDescription
Data TypeOPCHDA_ DATA_TYPEInt16The data type for the item. For information, refer to Supported Data Types.
TagDescriptionOPCHDA_ DESCRIPTIONStringThe description of the item.
Engineering UnitsOPCHDA_ ENG_UNITSStringThe units for the item (for example, kg/sec).
ArchivingOPCHDA_ ARCHIVINGBooleanIndicates whether Historian stores data for this item. The following values are valid:
  • 0: Indicates that data for this item is not stored.
  • 1: Indicates that data for this item is stored.
ItemIDOPCHDA_ ITEMIDStringThe Historian tag name. This is used to allow filtering in CreateBrowsemethod.