1、Allows for V/F, vector and constant torsion three control methods, the easy switching with high accuracy also ensure efficient working.2、With complete control ports, the variable frequency drive can be widely used in various automation equipment with PLC and sensors.3、The built in PID controller makes it applicable to circumstances requiring constant pressure, constant temperature, constant tension open loop control and closed loop control.4、High frequency control, 8 speed control and textile swing frequency enables using for high speed spindles such as textile engraving machines.5、User defined multifunction shortcut keys and instantaneous power failure without stopping function premises simple and reliable operation.6、The automatic voltage adjustment function will automatically keep the output voltage constant when the grid voltage changes.7、Has 25 kinds of fault protection, including over current protection, over voltage protection, under voltage protection, over temperature protection, phase loss protection and so on.