text: <s>[INST] PowerFlex 755 , High Starting Current Summary: PowerFlex 755 , High Starting CurrentDear all , The problem description :I have a blower on a powerFlex 755 I have a problem with starting the blower , I did many trials . What happened at the beginning that the frequency of the blower was over shooting , for example the setpoint was 15 Hz and it reached 22 Hz and then it came down to 15 , but the current was high . After trying many trials , what is happening now is that the current is high at starting . It looks like that the blower is running faster than the calculation of the frequency drive . I tried to make the starting time longer or shorter , didn’t help . At the beginning the current go up and down several times and then it reaches a peek and then starts to go down to normal current Does anyone have any idea ? [/INST] How is the drive configured? Flux Vector, V/Hz? It sounds like it a PID routine is trying to control the drive. Try putting the drive in V/Hz mode and see what happens when you tell it to start and ramp to a set speed. If it starts in a satisfactory manner in that simple setup, then your PID is trying too hard to control the drive. \\n </s>