The Pre-defined data types already exist in RS Logix 5000 with every new project that is created. They are commonly called “Structures” in other programming languages such as C. Pre-Defined data types are complex data types that are made up of 1 or more Atomic data types, Arrays, or other Pre-defined data types. All Atomic data types are addressable in the C-more programming software and can be imported via the L5K or L5X file. The syntax for the Atomic data types is simply the tag name itself (no pre cursors or delimiters). The five main types of Tags that can be requested from the PLC are listed and discussed below:Ītomic Tags are the base data type unit of which all other complex data types are comprised. The ControlLogix, CompactLogix and FlexLogic PLCs are Tag Based PLC architectures and do not have traditional PLC Addressing like the SLC and MicroLogix series.
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