Design of coal mine underground drainage pump monitoring and controlling system based on PLC and touch screen

Coal mine underground drainage system undertakes the important task of draining all the inflow produced during the process of production in underground coalmine, hence it is important equipment in mine production. The design of monitoring and control system of underground drainage pump is thus particularly important. In this paper, according to the practical underground work situations of a mine, a set of monitoring and control system of underground drainage pump based on PLC of Siemens S7–200 series and 10-inch touch screen of Delta DOP-B series (HM1) was designed. This system adopts S7–200 series CPU224PLC and EM231A/D module as its core, collects the operation parameters of underground drainage pump and displays them, automatically controls the startup and shutdown of drainage pump, monitors the water mark of shaft sump, and gives alarms in case of too high water level. It operates reliably and has high cost performance, thus enjoying bright prospect for promotion.