热交换站PLC控制系统设计摘要：可编程控制器（PLC）应用广泛，在工业上的应用使得各国的工业生产相较于以前更加的自动化、智能化。相较于微型计算机，PLC的抗干扰能力更强，工作更加稳定；相较于需要复杂连线的继电器，PLC编程更加方便快捷，能节约大量的生产成本。因为PLC具有如此多的优点，在我们生活中的各个领域PLC都得到了广泛的应用。热交换站是为居民集中供暖的设备，随着国民经济的发展，越来越多的人住进了城市里的小区楼，而基本上每个小区楼都少不了热交换站，工厂及各个公司里也都安装了热交换站，它已经覆盖了我们生活的大部分区域。本文主要介绍了热交换站的组成和其硬件系统的构成及特点，论述了如何使用PLC实现温度及压力的控制。关键词:热交换站PLCS7-200控制系统HeatexchangestationPLCcontrolsystemdesignABSTRACT:Programmablecontrollers(PLCs)arewidelyused.Theindustrialapplicationmakestheindustrialproductionofeachcountrymoreautomaticandintelligentthanbefore.Comparedwithmicrocomputers,PLC'santi-interferenceabilityisstrongerandtheworkismorestable.Comparedwithrelaysthatrequirecomplicatedwiring,PLCprogrammingismoreconvenientandfaster,anditcansavealotofproductioncosts.BecausePLChassomanyadvantages,PLChasbeenwidelyusedinallareasofourlives.Theheatexchangestationisadeviceforthecentralheatingofresidents.Withthedevelopmentofthenationaleconomy,moreandmorepeoplearelivingintheresidentialbuildingsinthecity.Basically,eachheatexchangestation,plantandcompanyareindispensableforeachresidentialbuilding.Therearealsoheatexchangestationsinstalledinit,whichalreadycovermostofourlives.Thisarticlemainlyintroducesthecompositionoftheheatexchangestationanditshardwaresystem,anddiscusseshowtousePLCtocontrolthetemperatureandpressure.KEYWORDS:heatexchangestationPLCS7-200controlsystem目录第一章绪论·············································································································51.1热交换站的发展概述.......................................51.2PLC控制集中供热的意义...................................51.3课题的来源及研究目的.....................................5第二章热交换站的介绍及设计简介·································································62.1热交换站的简介...........................................62.2热交换站控制系统的组成...................................62.3热交换站的组成及其作用...................................72.3.1换热器...............................................72.3.2流量计...............................................82.3.3水泵.................................................82.3.4变频器...............................................92.3.5阀...................................................92.3.6温度计、压力计.......................................92.3.7PLCS7-200...........................................92.4热交换站的工作原理......................................102.5控制系统的设计方案......................................102.6该方案要实现的目标......................................11第三章控制系统简介······················································································113.1压力的调节控制..........................................113.2循环水流量的调节控制....................................123.3硬件框架图...............
