Allen-Bradley CompactLogix 1769-L23E-QB1B Installation Instructions Manual page 34

34 CompactLogix Controller
8. Click Finish and then click Yes.
The firmware upgrade begins.
Do not interrupt the firmware upgrade once it has begun.
IMPORTANT
Interrupting the firmware upgrade may result in an inoperable packaged controller.
During the firmware upgrade you see the status change as shown below.
Status
Change
Continue to allow the firmware upgrade to complete without interruption.
Rockwell Automation Publication 1769-IN082C-EN-P - February 2013
Status
Change