text: <s>[INST] PowerFlex 755 Summary: Fault code 13035Hi, I got a system with ControlLogix L61(FRN 17) and PowerFlex 755 with Ethernet/IP communication. a broken powerflex 755 has FRN 1.1, and replace with a new powerflex 755 FRN 9.1 after download the drive parameter and change in IO tree at rslogix5000. at powerflex 755 i got a fault code 13035, Net idle fault. any idea/help appreciated. Thanks. [/INST] Raph, you've got yourself a conundrum. Firmware 1.1 is seriously buggy; the fact that you've not had problems until this point is quite lucky for you. The easiest solution in terms of amount of work is to downgrade the firmware of the drive using ControlFlash. You can download the firmware from this page: http://www.ab.com/support/abdrives/webupdate/index.html and http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?catID=6&Keyword=PowerFlex&crumb=112 That leaves you with buggy firmware. However, if it's been working, I suppose you will not have future problems. I've had experience with that firmware; in your shoes I'd leave the firmware of the drive at 9 and instead install a new AOP into ControlLogix, then change the firmware listing for the drive in the I/O tree. If your application truly has been working with no problems, take the easy route and downgrade the drive firmware to match the application. \\n </s>