Based On PLC Frequency Constant Pressure Watet Supply System Design And Implementation

Water supply system is indispensable in production and living, this paper designed a set of PLC to realize frequency conversion velocity modulation constant pressure water supply control system, use configuration software to manage the interface. System, adopting the frequency conversion circulation way run by the programmable logic controller PLC, frequency converter, water pressure sensor control system. Of three pumps motor electrical units, through the inverter to realize the three-phase ac motor soft start, controlled by frequency conversion motor revolutions, by changing the pump outlet pressure and flow, to realize the closed loop automatic adjustment, constant voltage and frequency supply. Using the MCGS configuration software to the system of remote monitoring and simulation debugging. There is a problem when alarm query can be realized. Make the system run in a state, the most reasonable assurance on-demand water, save the energy.