ProSoft Technology MVI56E-MNET/MNETXT - Manual (Page 76)

Ladder Logic MVI56E-MNET / MNETXT ♦ ControlLogix Platform
User Manual Modbus TCP/IP Interface Module
Page 76 of 181 ProSoft Technology, Inc.
April 23, 2014
3.1 Controller Tags
Data related to the MVI56E-MNET is stored in the ladder logic in variables called
controller tags. Individual controller tags can be grouped into collections of
controller tags called controller tag structures. A controller tag structure can
contain any combination of:
 Individual controller tags
 Controller tag arrays
 Lower-level controller tag structures
The controller tags for the module are pre-programmed into the Add-On
Instruction Import Rung ladder logic. You can find them in the Controller Tags
subfolder, located in the Controller folder in the Controller Organizer pane of the
main RSLogix 5000 window.
This controller tag structure is arranged as a tree structure. Individual controller
tags are found at the lowest level of the tree structure. Each individual controller
tag is defined to hold data of a specific type, such as integer or floating-point
data. Controller tag structures are declared with user-defined data types, which
are collections of data types.
3.1.1 MVI56(E)-MNET Controller Tags
The main controller tag structure, MNET, is broken down into four lower-level
controller tag structures:
The four lower-level controller tag structures contain other controller tags and
controller tag structures. Click the [+] sign next to any controller tag structure to
expand it and view the next level in the structure.