Drives Service & Support > Product Advisories > 1769-Lx3

Product Advisories: 1769-Lx3 CompactLogix controller, firmware revisions 15.01-15.03
Ref: ACIG 2006-01-001

Problem Description

With the 1769-L3x CompactLogix controller, firmware revisions 15.01 – 15.03 , hereafter referred to as the 1769-L3x controller, the following functional issue exists:

Functional Issue – Generated faults on the 1769-L3x controller can hold outputs in their last state rather than turning outputs off.

With a 1769-L3x controller, if 1769 I/O backplane faults or certain I/O module hardware faults occur, outputs are held in their last state at the time of the fault condition rather than the outputs turning off. This only occurs with 1769 I/O backplane faults and certain I/O module hardware faults (e.g. loss of backplane termination, loss of 24V on an analog module configured to use external 24V, etc.) and not with general controller faults (e.g. Watchdog timeout).

This behavior is contrary to the information in the CompactLogix System User Manual, publication 1769-UM011.

Temporary Workarounds

There is no temporary workaround. An updated firmware release is planned in December 2005.

Product Identification

Product affected by this Product Service Advisory includes 1769-L3x CompactLogix controllers, with the following series and firmware revision:

• 1769-L3x CompactLogix controller, firmware revisions 15.01 – 15.03.
• To determine the firmware revision of your controller, use the RSWho function in RSLinx software to navigate to the controller. Right-click on the controller and select Device Properties. This displays the current firmware revision of that controller. Or use RSLogix 5000 software while online with the controller. Right-click on the controller in the Controller Organizer and select Controller Properties.
• The affected firmware was available between June 2005 and December 2005.

Problem Correction

To correct this issue, update the 1769-L3x controller firmware. The functional issue described above has been corrected in the following revisions of the 1769-L3x controller :

• 1769-L3x CompactLogix controller, firmware revision 15.04

Requested Customer Action

• Each notified customer should take the following actions:
• Confirm that you have the affected products.
• Update the firmware to the revision listed in the “Problem Correction” section on page 2. Firmware revisions are available on the Rockwell Automation web site. To download an update kit:
• Go to www.ab.com.
• Click Product Support.
• Click Software Updates.
• Select CompactLogix Controllers and Submit.