3.3UDTs (User Defined Types)

UDTs are unique to ControlLogix and allow a user to tailor data structures to their exact needs. In ControlLogix a user can create a data structure template, then assign that UDT as the data type of a tag. For example a UDT tasked with monitoring a motor could contain fields like speed, status, and fault. This UDT could then be assigned to multiple tags monitoring different pumps (pump1, pump2, pump3, etc.).

A user can also create nested UDTs. This is where a UDT is selected as a data type within another UDT.

Note: Refer to the Data Types section within Tags for UDT data types, as UDTs use the same data types.