1. PLC controller: it contains a program, which can realize the full brake control of the water supply process
2. Man-machine interface: touch screen or text screen, parameter setting, running status view, fault diagnosis display.
3. Switching power supply: for PLC and man-machine interface, and for external control loop.
4. Frequency conversion control: It is the application of frequency conversion technology and microelectronics technology to control the speed of the AC motor by changing the frequency of the motor's working power supply