Rockwell Automation 1756-XXXX ControlLogix Digital I/O Modules - Manual (Page 131)

Rockwell Automation Publication 1756-UM058G-EN-P - November 2012 131
Configure ControlLogix Digital I/O Modules Chapter 7
Communication or Connection Formats
The initial configuration of a module requires you to choose a communication or
connection format. The term used depends on the AOP for your module. Earlier
AOPs use communication formats, and later AOPs use connection formats.
A communication or connection format determines the following:
• Available configuration options
• Type of data that is transferred between the module and its owner-
controller
• Which tags are generated when the configuration is complete
The communication or connection format also defines the connection between
the controller writing the configuration and the module. The number and type of
choices varies depending on what module you are using and whether it is in a
local or remote chassis.
IMPORTANT Communication formats cannot be changed whether online or offline after a
program is downloaded to the controller.
However, connection formats can be changed when offline after a program is
downloaded to the controller.
TIP When you choose a Listen-only format, only the General and Connection tabs
appear when you view a module’s properties in RSLogix 5000 software.
Controllers that want to listen to a module but not own it use a Listen-only
format.