UDT optimization

A UDT (User-Defined Type) is a data type defined by the user in the Logix5000 processor. A UDT can group various data types, such as integers, floats, and so on, into a single structure. When this feature is enabled, the Communication Driver will attempt to group requests for a UDT’s elements into a request for the whole structure. In fact, this feature also works for system predefined structure.

If the size of the structure exceeds 488 bytes, the Communication Driver will send separate requests for each structure’s element. If the UDT involved is a nested structure (a UDT containing other UDTs), the Communication Driver will determine the optimal UDT to retrieve.

Note: Optimization and UDT Optimization features are selectable from all Logix5000-series controllers.