PLC根据所采集的流量、水位、温度等条件自动控制开、停泵的台数，以确保清水供水系统的正常运行。
According to the flux, water level, temperature, etc, PLC sends out command to start or stop pumps, and keeps the system in normal operation condition.
自动控制时，PLC根据进水压力传感器提供的压力信号，判断是否启、停加压泵。
Under automatic control mode, the PLC judges whether opened or stopped the pressure pumps by the pressure signal which provided by hydraulic pressure sensor.
自动控制时，PLC根据进水压力传感器提供的压力信号，判断是否启、停加压泵。
Under automatic control mode, the PLC judges whether opened or stopped the pressure pumps by the pressure signal which provided by hydraulic pressure sensor.
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