text: <s>[INST] PF700 on separator, Motor Overload I have installed a PF700 on a separator. This, of course, is basically a centrifuge. In the process they have a shoot cycle that I would call a shock load. The system is running at 4700 rpm and when the shoot occurs it slows the 4000rpm. The drive attempts to induce more current to keep the rpm stable and goes out on overload. I have the drive in Custom V/Hz at this point and can only assume that I should go to SVC to have more options on run boost. Looking for someone who has a bit of experiance in this. Not a fun one to troubleshoot when accel is 10 minutes and decel in 1hour. [/INST] Using the standard vector control should be fine for your application. I'm also assuming that the motor parameters have been entered correctly including the number of poles on the installed motor. There are some boost setting that may help but since it takes 10 minutes to accel, the optimum solution may be to meter in the load if possible so it's not so much of a shock. How long does it stay at 4000 rpm after the load has been applied assuming it didn't trip? I'm also going to assume after the load has been added it is trying to get the centrifuge back up to 4700 RPM? \\n </s>