Design of PLC Automatic Water and Fertilizer Integrated System in Greenhouse

Abstract

In this system, the soil moisture content is collected by the FDS soil moisture sensor, and the pH value in the soil is collected by the soil in situ EC meter. The collected moisture and EC values are transmitted to the PLC and displayed through the touch screen display. The automatic mode or manual mode is selected through the touch screen, and the humidity and PH value are set in different modes to realize automatic watering of the proportional fertilization pump. The overall scheme, circuit diagram and program of the system designed in this paper have been designed and implemented after many times of debugging.