Logic programs have values that use the data type names that are specified in the IEC 1131-3 standard. These data type names have different names in the Windows Automation standard and the ClearSCADA code. This means that the name for the data type of a value will vary depending on whether you access it in Logic, OPC (which uses the Windows Automation standard), or the ClearSCADA Database Schema (which uses the ClearSCADA code data type names).
In this section, we explain how to Display the OPC Data Type for a Property. We also provide a table that shows the different data type names for each standard (see Data Types for Logic, OPC, and ClearSCADA) and information on how the categories for data types (see Data Type Hierarchy).