Hi i have the same problem here in a machine. E2092 that leads to a F4002.
Solved: Error E2092 to Fault F4002 (boschrexroth.com)
I am using a MOOG COE controller and it does not have the same tools as beckhoff controllers. I have a cycletime of 10 ms and 20% sync offset on the controller. Still having sporadic e2092. I changed it to 30% and i still have it sometimes (maybe it got better but i don´t know for sure).
Maybe unrelated but happend twice: I touched the usb cable (from my pc to display on ctrlx drive) and it trigerred F4002.
Can someone give me a help on this subject? Is this a master configuration problem or could it be a cable problem?