Dear Colleagues, I made firmware update for the CPU AC900F, after updating the CPU display this message (Bootloader waiting...) I waited too much but nothing happened, CPU now out of the service. what I can do to return the CPU to service ?. and I don't know what was wrong.
Usually the firmware update takes about 5 minutes. How long did you wait? From which previous version to which new version did you try the update? What happens if you now switch on the CPU? Does it still show the bootloader waiting on the display?
Have you tried to connect a diagnostic cable to the diagnostic port of the CPU and use a terminal program to get information? The process is described in the Mounting & Installation manual for AC 900F in chapter 7.2, Commissioning / Controller Configuration via Terminal Program What output do you get on the terminal, when you power up the CPU?