Hi Twoblocked…
You most likely have a bad ram chip on your CPU-40 (right below SW chip) or a bad cpu altogether. My guess is the MCU and drive are fine. That’s a good running elevator. You will see this same problem in the future as CPU-40’s begin to age with all KONE equipment.
We got the car running the next day. That is exactly what the issue was though. The guy before me put a new CPU in and installed the original software and NVRAM chip. We found the old CPU and installed it with a new RAM chip and was able to change 1-95 parameter and access 6 parameters.
