User-Defined Data Types (Udts); Mvi69E-Mbs User-Defined Data Types - ProSoft Technology CompactLogix MVI69E-MBS User Manual

MVI69E-MBS ♦ CompactLogix™ Platform
Modbus Serial Enhanced Communication Module
4.2

User-Defined Data Types (UDTs)

User-defined data types (UDTs) allow you to organize collections of data types into
groupings. You can use these groupings, or data type structures, to declare the data
types for controller tag structures. Another advantage of defining a UDT is that you may
reuse it in other controller tag structures that use the same data types.
The Add-On Instruction for the MVI69E-MBS module has pre-defined UDTs. You can
find them in the User-Defined subfolder, located in the Data Types folder in the
Controller Organizer pane of the main RSLogix window. Like the controller tags, the
UDTs are organized in a multiple-level tree structure.

4.2.1 MVI69E-MBS User-Defined Data Types

Twenty different UDTs are defined for the MVI69E-MBS Add-On Instruction. The main
UDT, MBSMODULEDEF, contains all the data types for the module and was used to
create the main controller tag structure, MBS. There are five UDTs one level below
MBSMODULEDEF. These lower-level UDTs were used to create the MBS.CONFIG,
MBS.DATA, MBS. CONTROL, MBS.STATUS, and MBS.UTIL controller tag structures.
Click the [+] signs to expand the UDT structures and view lower-level UDTs.
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Using Controller Tags
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