Rockwell Automation 1756-XXXX ControlLogix Digital I/O Modules - Manual (Page 17)

Rockwell Automation Publication 1756-UM058G-EN-P - November 2012 17
What Are ControlLogix Digital I/O Modules? Chapter 1
Module Identification and
Status Information Each ControlLogix I/O module maintains specific identification information
that separates it from all other modules. This information assists you in tracking
all the components of your system.
For example, you can track module identification information to know which
modules are located in any ControlLogix chassis at any time. While retrieving
module identity, you can also retrieve module status.
Item Description
Product type Module’s product type, such as digital I/O or analog I/O
Product code Module’s catalog number
Major revision Module’s major revision number
Minor revision Module’s minor revision number
Status Module’s status, including these items:
• Controller ownership
• Whether the module has been configured
• Device-specific status, such as the following:
– Self-test
– Update in progress
– Communications fault
– Not owned (outputs in Program mode)
– Internal fault (needs update)
– Run mode
– Program mode (outputs only)
• Minor recoverable fault
• Minor unrecoverable fault
• Major recoverable fault
• Major unrecoverable fault
Vendor Module’s manufacturer vendor, such as Allen-Bradley
Serial number Module’s serial number
Length of ASCII text string Number of characters in module’s text string
ASCII text string Module’s ASCII text string description
IMPORTANT You must perform a WHO service to retrieve this information. For more
information, refer to
page 228 .