基于plc变频调速供水系统的设计

AbstractWith the rapid development of socialistic marketing economy,there is a growing demand forbetter quality of water supply and higher reliability of supply system.In addition,consideringthe current common energy crisis,achieving the scheme of automatingthe water supplysystem.So it is an inevitable tendency to design and create an energy-savingconstant-pressurewater supply system of excellent performance with the help of advancedtechniques ofautomation,monitor-control system;and communication.Meanwhile,the System can alsoadapt to various water Supply regions.This paper analyzes the structure of VF speed regulating constant-pressure watersupply,and proposes several control methods.By careful study and comparison,PLC andinverter's method fits water supply system and datatransmission very well.Finally the papershows the design of constant pressure supply water controller according to PID data anddetailed introduction of its software and hardware.In this paper,the author designs and realizesthe remote monitor and control system through MCGS,and then illustrates its general design,software implement and the measures of preventable disturbance in details.The system,which has initially been completed with reliable performance and excellentenergy-saving effect,proves to possess high reliability and real-time quality.The system cannot only remarkably improve the quality of water supply,but also economize on labor,whichwill surely bring us both economic and social benefits.Key Words:VF speed;constant pressure water supply;PLC:MCGS;monitor andcontrol-system