Ladder Logic
MVI56E-MNETCR ♦ ControlLogix Platform
User Manual
Modbus TCP/IP Multi-Client Enhanced Communications Module for Remote Chassis
Page 76 of 161
ProSoft Technology, Inc.
3.1
Controller Tags
Data related to the MVI56E-MNETCR 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)-MNETCR Controller Tags
The main controller tag structure,
MNETCR
, 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.
For example, if you expand the
MNETCR.DATA
controller tag structure, you will
see that it contains two controller tag arrays,
MNETCR.DATA.ReadData
and
MNETCR.DATA.WriteData
, which are 600-element integer arrays by default.
Each controller tag in the Add-On Instruction is commented in the
Description
column.
Summary of Contents for MVI56E-MNETCR
Page 4: ......
