Two days ago I used Control Flash Plus to upgrade the firmware on a 1756-L71 controller from v20.13 to V35.12. The upgrade aborted soon after it started and before any blocks were transferred. Now the controller displays CHRG on its status display and it does not appear in the web browser or in RSLinx. It just shows up as an empty slot.
I referenced https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/450803 and tried the following to communicate with it:
1. Removed the Energy Stored Module (ESM) while controller powered on.
2. Powered off controller.
3. Reinstalled ESM.
4. Powered on controller.
5. Moved controller to empty slot in same rack.
6. Moved controller to completely different rack.
7. Connected directly to controller with USB cable (does not appear in RSLinx).
The controller has been in service since 2016. Rockwell Tech Support says it's very difficult to brick L7x controllers (also L8x) and this is the first time they've heard of one being bricked.
Question: Is an L71 repairable when bricked?
I referenced https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/450803 and tried the following to communicate with it:
1. Removed the Energy Stored Module (ESM) while controller powered on.
2. Powered off controller.
3. Reinstalled ESM.
4. Powered on controller.
5. Moved controller to empty slot in same rack.
6. Moved controller to completely different rack.
7. Connected directly to controller with USB cable (does not appear in RSLinx).
The controller has been in service since 2016. Rockwell Tech Support says it's very difficult to brick L7x controllers (also L8x) and this is the first time they've heard of one being bricked.
Question: Is an L71 repairable when bricked?