摘要本设计是专门对日常用水而设计的恒压供水控制系统。根据国内外的研究现状以及系统的控制要求，制定出了一套适合此系统的控制方案。控制方案中，硬件设计主要对可编程控制器（PLC）机型、变频器机型以及电机泵组的机型做出了选择，同时还对系统的输入输出点进行了规划和分配。在软件设计部分，针对控制要求画出了系统的流程图并且还对每一部分的流程图进行了功能的解释，使读者能更加轻松的了解整个系统的软件设计情况。在此课题中，还采用了MCGS组态软件，对控制系统进行监视与模拟运行，很直观的再现了现场的实际情况。最后，还对整个系统进行了运行调试，运行结果表明该系统具有水压稳定、硬件组成简单、运行可靠和操作方便等优点。关键词：恒压供水；可编程控制器；变频器；组态软件IAbstractThisdesignisspeciallydesignedforwaterconstantpressurewatersupplycontrolsystem.Accordingtotherequirementsofthecurrentresearchathomeandabroadandthesystemcontrol,developasetofcontrolschemesuitableforthesystem.Inthecontrolscheme,thehardwaredesignismainlytotheprogrammablelogiccontroller(PLC)model,frequencyconverterandmotorpumpsetmodelmadeachoice,butalsoonthesysteminputandoutputpointsofplanningandallocation.Insoftwaredesignpart,accordingtodrawtheflowchartofthesystem,andtherequiredcontrolandflowchartofeverypartofthefunctionofexplanation,sothatreaderscanmoreeasilyunderstandthesoftwaredesignofthewholesystem.Inthistopic,alsoadoptedtheMCGSconfigurationsoftware,tomonitorandcontrolsystem’ssimulate,intuitivereproducetheactualsituationofthescene.Finally,thedebuggingofthewholesystemrunning,theresultsonthesurfaceofthesystemhasstablepressure,simplestructure,reliableoperationandconvenientoperation.Keywords:Constantpressurewatersupply；ProgrammablelogicController；Inverter；ConfigurationsoftwareII目录摘要.........................................................................................................IAbstract...............................................................................................................II目录............................................................................................................III第一章绪论..........................................................................................11.1本课题的目的及研究意义....................................................21.2恒压供水系统的国内外研究现状...............................21.3恒压供水系统的控制要求....................................................3第二章恒压供水控制系统方案论证..............................42.1恒压供水控制系统分析...........................................................42.2恒压供水控制方案比较...........................................................42.3供水方式与控制方案的选择.............................................5第三章恒压供水控制系统的硬件设计........................63.1恒压供水控制系统设备选型.............................................63.1.1PLC机型的选择.............................................................................63.1.2变频器机型的选择...............................................................63.1.3电动机机型的选择...............................................................83.1.4水泵机型的选择......................................................................83.2PLC输入输出接点分配..................................................................93.3PLC中内部触点的分配..................................................................93.4PLC输入输出接线原理图设计............................
