UPDATED: Downgrading a CCM, CG Series controller, or XPM expansion module with factory date code RY12437 or later, and then upgrading it to firmware version 11.0.0.x, 11.0.1.x, or 11.0.2.x will put the device in an unrecoverable state.
Summary of Changes:
- Title updated to bring more attention to the cause of CCM, CG Series controllers, and XPM expansion modules entering an unrecoverable state.
- Added additional information on how to prevent accidental downgrades and download process delays.
- Added Table 1 to illustrate examples of different upgrade and downgrade scenarios.
Problem:
A hardware component change on all CCM, CG Series controllers, and select XPM expansion modules with factory date code RY12437 or later has made prior Release 11 controller firmware versions incompatible with these devices. Loading incompatible firmware on the controller causes a constant reboot cycle that is not recoverable in the field.