text: <s>[INST] 22-comm-P with a Powerflex40 Summary: Communications issues between comm card and drive We have experienced three seperate powerflex 40 drives having issues with what appears to be comm card to drive communications issues. Drive performance will become erratic, MOD light on comm card will start intermittently flashing green. Communications on Profibus side have been monitored and found to be stable. When I connect my 22 comm cable to the drive to use drive explorer, the drive will go completely crazy. Once I get drive explorer connected and go to comm card diagnostics, the logic command signals come and go. Found that cycling power on comm card will clear issue so this appears to be simply restarting the communications on the 485 side between card and drive. Has anyone else seen similar issues? [/INST] I have seen some problems with PF 40 drives with 22-COMM-E adapters. The connection between the comm adapter and the drive stops communicating. Replacing the drive with another will fix the issue and the original PF 40 seems to work otherwise. I have not been able to determine a resolution yet. This is not wide spread but I have seen it in more than one location. Eastman do you happen to work in the Kingsport plant? Thanks \\n </s>