frequency inverter,frequency converter, ac driver PID control Function,simple PLC,16 steps ... ±0.5%Max speed(SVC)Product functionsImportant functionRPM track,Torque limitation,Multi-step speed,automatic self-adjustment,Slip compensate, ... PID adjust,Sagged control,Current control,Torque boost,Multifunctions input /output terminal Frequency given wayKeyboard,upper ...