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辽宁科技大学本科生毕业设计第I页游泳池水处理系统的PLC设计摘要在工业不断发展的今天，人们更加追求自动化的同时可编程序控制器映入了我们的眼帘，可编程序控制器在各行各业的应用不断增加，让我们看到他的应用之广泛，此次设计是在游泳池水处理自动控制方面的一个具体体现，正文介绍了可编程序控制器（PLC）、西门子S7-300CPU313及温度传感器在游泳池水处理系统中的应用及PID调节。本设计在详细了解了S7-300PLC的结构、用法，以及游泳池水处理系统的工艺流程的前提下，运用PLC对水处理各环节进行精确的控制。引入PLC后，比传统的游泳池更加安全、可靠，更加节省人力资源，操作简单，节省硬件等诸多优点，随着市场的开放与不断扩大许多国外的品牌不断涌入我国，我们可以选用更适合要求的产品。选用合适的PLC有利于系统的完美发挥，无论是从抗干扰能力或是其他方面PLC控制的系统都是当前最具实力的产品。关键词：可编程序控制器；S7-300；PID温控辽宁科技大学本科生毕业设计第II页PLCdesigningofnatatoriumwaterprocessingsystemAbstractWiththedevelopmentandadvancementofindustry,theProgrammableLogicControllerthathasbeenwidelyappliedinalotfieldshasbecomefocusnowadays.Thisdesigningisamaterialandconcreteexhibitionintheaspectofnatatoriumwaterprocessingsystem.ThisarticlemainlyillustratesPIDregulationandtheapplicationofProgrammableLogicController---PLC,SiemensS7-300CPU313andtemperaturesensorinthenatatoriumwaterprocessingsystem.ThearticlehasdetailedintroducedtheS7-300PLCstructureandusage.Furthermore,ithascompletelycomplainedtheprocessofcirculationwaterprocessingsystemandtemperatureregulation,aswellastheconcreteoperationprocess.Comparingtothetraditionalone,thePLCcontrollingsystemhasmadethenatatoriummoresafeandcredible.Moreover,itnotonlycanbeoperatedeasily,butalsocansavealotofhumanresourceandhardwareforustoo.Aspeoplehaveknown,ProgrammableLogicControllerhasbecomethedevelopingtrendofindustrialautomation.Duetotheopenanddistensiblemarket,alotofforeignproductsofPLCthatprovidemorechoicesforushaveentered.Aspeoplehaveknown,agoodchoiceofPLCwillmakethesystemmoreperfect.Keywords：ProgrammableLogicController；S7-300；PIDtemperaturecontrol辽宁科技大学本科生毕业设计第III页目录摘要.........................................................................................................................................IABSTRACT...........................................................................................................................II1绪论....................................................................................................................................11.1引言..................................................................................................................................11.2国内外游泳池水处理方式..............................................................................................11.3本课题研究主要内容......................................................................................................21.4课题研究的意义..............................................................................................................22系统概述.............................................................................................................................42.1设计要求..........................................................................................................................42.2控制系统简介..................................................................................................................42.3控制系统要求..................................................................................................................52.3.1水循环及过滤部分...................................................................................................62.3.2水质检测及加投药部分...........................................................................................72.3.3恒温加热系统控制...................................................................................................73PID温度控制...................................................................................................................113.1基本概念........................................................................................................................113.1.1比例调节（P调节）..............................................................................................113.1.2积分调节（I调节）...............................................................................................113.1.3微分调节（D调节）.............................................................................................123.2PLC中的PID控制实现方法........................................................................................124西门子S7-300及硬件设计........................................................................................154.1PLC的简介....................................................................................................................154.1.1PLC的特点..............................................................................................................15辽宁科技大学本科生毕业设计第IV页4.1.2PLC的分类..............................................................................................................164.2PLC的基本组成............................................................................................................164.2.1主机.........................................................................................................................164.2.2编辑器.....................................................................................................................184.2.3I/O扩展和其他外围设备...............................................................................