Rockwell Automation Logix5000 Controllers Controller Information and Status Programming Manual - Manual (Page 10)

Chapter 1 Connections
In some situations, such as when initially commissioning a system, it is useful to
disable portions of a control system and enable them as you physically connect the
control system. The controller lets you inhibit individual modules or groups of
modules, which prevents the controller from trying to communicate with the
modules.
Inhibiting a module breaks the connection to the module and prevents communication of I/O data.
When you configure an I/O module, it defaults to not inhibited. You can change
an individual module’s properties to inhibit a module.
If you want to Then
Communicate with the module Do not inhibit the module. Clear the Inhibit Module
check box.
Prevent communication with the module Inhibit the module. Select the Inhibit Module check box.
When you inhibit a communication bridge module, the controller shuts down the
connections to the bridge module and to all the modules that depend on that
bridge module. Inhibiting a communication bridge module lets you disable an
entire branch of the I/O network.
When you inhibit the module, the Controller Organizer displays a yellow
attention symbol over the module.
If you are And you And Then
Offline ------------------------------> --------> The inhibit status is stored in the project. When you download the project, the module still is
inhibited.
Online Inhibit a module while you are connected
to the module
--------> The connection to the module is closed. The module's outputs go to the last configured
Program mode.
Inhibit a module but a connection to the
module was not established (perhaps due
to an error condition or fault) --------> The module is inhibited. The module status information changes to indicate that the module is
inhibited and not faulted.
Inhibit a connection
10 Rockwell Automation Publication 1756-PM015F-EN-P – October 2014