text: <s>[INST] PowerFlex 755 and IPM motor with an encoder Summary: Can’t control the speed of a permanent magnet motorHi, I am trying to control Internal Permanent Magnet Motor (not experienced at all) with Powerflex755 drive and I am lost. Today last thing I was successfully able to do was direction test and auto tune for rotational test. But after that once I started commanding the speed, drive couldn’t hold the speed at desired speed. The status would show constantly changing into accelerating, at reference and decelerating (what is the reason for this?)And it would fault as input phase loss. I received other faults too while trying lots of things and it turned into a mess. We are commanding the speed using a 0-10V analog card. The permanent magnet Baldor motor has a continuous rated speed as 1800RPM. And it’s maximum safe speed is rated as 5000RPM on the data plate. I was using CCW wizard to tune and start the drive. My question is: I set the speed reference as: Speed reference: Port5,Param Anlg In0 Value Speed ref A high: 1800rpm Speed ref A low: 0rpm Analog in Hi: 10V Analog in Low: 0V Analog Out 0 as: Select: Port 0, Param Mtr Vel Fdbk Scaling: Value High: 5000, Value low: 0 Range High: 10v, range low: 0v Attached are the screen pictures from ccw. I can add more pictures if needed. Should the scaling be 1800 since it’s the rated rpm? But I will need to run it at maximum safe speed... I tried changing speed reference from 1800 to 5000rpm but it doesn’t accept any value more than 1800rpm. Any thoughts would be highly appreciated. I’m lost... Thanks in advance [/INST] What is the value of parameter 35 (motor control mode)? What are the values of parameters 25 through 31 (motor data)? What is the value of parameter 125 (primary velocity feedback select)? \\n </s>