Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 259
Upgrade from a Standard Redundancy System or to Another Enhanced Redundancy System Appendix C
11. Click Change Controller.
12. Specify the controller revision to which you are upgrading.
13. If you installed a new controller while upgrading the primary chassis
firmware, specify the new controller catalog number.
14. Click OK.
15. Access the Module Properties for each communication module in the
chassis and specify the module firmware revision to which you are
upgrading.
16. Save the project.
17. Download the project to the secondary controller.
The secondary controller is at the higher network address of the two
available for the redundant chassis.
18. After the download is complete, go offline.
If you are unable to specify the new revision, you may need to change the
Electronic Keying parameter to Compatible Keying.