How to Reverse a 3-Phase Motor by A720H Variable Frequency Drive?
Published: October 30, 2025
The A720H series variable frequency drive can control the forward and reverse rotation of a three-phase motor in several ways. The video demonstrates three common methods:
1. Panel Control
This is the default and simplest method. The forward and reverse rotation can be switched using the multifunction key on the panel. The A720H VFD parameters are set as follows:
ā¢ P0-02 = 0: Control by VFD panel (default) ā¢ P7-01 = 2: FUNC key for forward/reverse switching
2. Two-Button Control
Two buttons are used ā one for forward and one for reverse. When either button is released, the motor stops. Parameters set as follows:
As the figure above shows, when K1 is closed, the motor rotates in forward direction; when K1 is open, the motor stops.
When K2 is closed, the motor rotates in reverse direction. when K2 is open, motor stops; when K1 and K2 are both open or closed simultaneously, motor stops.
3. Three-Button Control
Three buttons are used ā one for forward, one for reverse, and one for stop. After the motor starts, it will only stop when the stop button is open. Parameters set as follows:
As shown in the figure, when the button SW3 is closed, the inverter will turn forward when SW1 is pressed, inverts when SW2 is pressed, and stops when SW3 is disconnected. SW3 must be kept closed during normal startup and operation. The commands of buttons SW1 and SW2 take effect immediately along the closing action, and the running state of the inverter is subject to the last key action of the three buttons.
A720H Variable Frequency Drive
A720H Series VFDs precisely control motor frequency through multiple methods, offering high quality at a competitive price.
