User-defined data types

The ABCIP Communication Driver supports read and write of user-defined data types. The Logix user-defined data type is a custom-made structure consisting of members that can be atomic, arrays (single dimension only), or structures themselves.

The user-defined data-type tags can be atomic or arrays up to three dimensions. The members of the structure can be any data types supported by this Communication Driver. If a structure contains another structure as its member, the maximum nesting supported is up to 20 levels.

Each level of members in a structure or each array dimension within a user-defined tag consumes one nesting level. The individual bits that make up a structure member do not constitute a nesting level.

The Communication Driver supports the optimization of user-defined data types. For information on UDT optimization, see Logix5000 Read Optimization.