User-Defined Data Types (Udts); Mvi56(E)-Mnetcr User-Defined Data Types - ProSoft MVI56E-MNETCR User Manual

MVI56E-MNETCR ♦ ControlLogix Platform
Modbus TCP/IP Multi-Client Enhanced Communications Module for Remote Chassis
Notice that the Data Type column displays the data types used to declare each
controller tag, controller tag array or controller tag structure. Individual controller
tags are declared with basic data types, such as INT and BOOL. Controller tag
arrays are declared with arrays of basic data types. Controller tag structures are
declared with user-defined data types (UDTs).
3.2

User-Defined Data Types (UDTs)

User-defined data types (UDTs) allow users to organize collections of data types
into groupings. These groupings, or data type structures, can then be used to
declare the data types for controller tag structures. Another advantage of defining
a UDT is that it may be re-used in other controller tag structures that use the
same data types.
The Add-On Instruction Import Rung ladder logic for the 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.

3.2.1 MVI56(E)-MNETCR User-Defined Data Types

Ten different UDTs are defined for the MVI56(E)-MNETCR Add-On Instruction.
The main UDT, MNETCRMODULEDEF, contains all the data types for the
module and was used to create the main controller tag structure, MNETCR.
There are four UDTs one level below MNETCRMODULEDEF. These lower-level
UDTs were used to create the MNETCR.DATA, MNETCR.CONTROL,
MNETCR.STATUS, and MNETCR.UTIL controller tag structures.
Click the [+] signs to expand the UDT structures and view lower-level UDTs.
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