CompactLogix Packaged Controllers 31
Publication 1769-IN082A-EN-P - July 2008
6. Use the checkbox and pull-down to select your controller and firmware 
revision.
7. Click Update.
8. Click Yes.
The firmware upgrade begins.
IMPORTANT
DO NOT INTERUPT THE FIRMWARE UPGRADE ONCE IT HAS BEGUN.
Interupting the firmware upgrade may result in an inoperable packaged controller.