text: <s>[INST] Powerflex 755 Electricity Shutdown Parameter Problem Hello Everyone, I have a strange problem on Powerflex 755. We use 15kW 30 A drive and do incremental position control. When we download parameters to the drive, the motor works fine but after we cut off the power and start the drive, the motor vibrates and runs loudly. After we upload backup file again and the motor starts fine again and after we cut off the power and start the drive, the motor vibrates and runs loudly again. There is a loop. Same thing for 20-HIM-A6. We can't see any parameter after cut off power. When we upload backup file again we can see parameters. How can we fix this problem? Can you help me? [/INST] Hello Emre, Do you have a Logix PLC communicating to this VFD via Ethernet? If so, do you have Automatic Device Configuration (ADC) enabled? I ask because if you are connected via Ethernet to a Logix processor and have ADC enabled, the PLC memory card is storing a copy of the VFD programming. So any VFD programming changes that you do AT THE DRIVE with the HIM module must then be uploaded into the PLC program. If not, then whenever control power is cycled to the VFD, the ADC system will see that the programming in the VFD is different from that in its memory and restore the programming from its memory back into the VFD, wiping out any changes you may have made locally using the HIM. \\n </s>