text: <s>[INST] PowerFlex 40-E AC Drive via 22 COMM-E Summary: Fault F081Hello Guys, i have an issue with my powerFlex40; it's getting the F081 sometimes after a start. I have 4 pf40 and they are almost configured the same way and this working like this for years. the 4 pf are wired in the same way that when an emergency stop is pushed they are all powered off(400V); after acknowledging the e-stop they all start normally but that one brings sometimes(not always) the F081: Comm Loss. I can even not reproduce the issue because it is not happening every time. Any Ideas what it could be? the network cable of the pf goes to a switch (all the 4 pf are connected on that switch) and from the switch to a 1794-AENT Ethernet adapter. [/INST] What sort of logic processor controls the VFDs? \\n </s>