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毕业论文:PLC西门子S7-200温度控制系统毕业设计.doc

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毕业论文:PLC西门子S7-200温度控制系统毕业设计.doc

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2222222222222222222222ngLinesToPoints2SelectionParagraphFormatLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesToPointselectionParagraphFccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF天津轻工职业技术学院毕业论文ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF第2页共39页内容摘要温度是工业生产中常见的工艺参数之一,任何物理变化和化学反应过程都与温度密切相关。在科学研究和生产实践的诸多领域中,温度控制占有着极为重要的地位,特别是在冶金、化工、建材、食品、机械、石油等工业中,具有举足轻重的作用。对于不同生产情况和工艺要求下的温度控制,所采用的加热方式,燃料,控制方案也有所不同。例如冶金、机械、食品、化工等各类工业生产中广泛使用的各种加热炉、热处理炉、反应炉等燃料有煤气、天然气、油、电等。温度控制系统的工艺过程复杂多变,具有不确定性,因此对系统要求更为先进的控制技术和控制理论。可编程控制器(PLC)可编程控制器是一种工业控制计算机,是继承计算机、自动控制技术和通信技术为一体的新型自动装置。它具有抗干扰能力强,价格便宜,可靠性强,编程简单,易学易用等特点,在工业领域中深受工程操作人员的喜欢,因此PLC已在工业控制的各个领域中被广泛地使用。关键字温度控制PLC组态ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF天津轻工职业技术学院毕业论文ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF第3页共39页目录1引言.................................................................31.1温度控制系统的意义.................................................31.2温度控制系统背景...................................................31.3研究技术介绍.......................................................32硬件设计.............................................................62.1硬件配置...........................................................62.2I/O分配表..........................................................82.3硬件接线图........................................................103软件设计............................................................103.1PID控制程序设计...................................................153.2S7200程序设计流程图..............................................173.3内存地址分配与PID指令回路表......................................183.4S7200程序设计梯形图..............................................184组态编程............................................................264.1PLC通信配置与通信方式.............................................264.2网络的通讯PPI协议................................................264.3组态软件Kingview..................................................284.4组态王定义外部设备和数据变量......................................284.5组态王界面........................................................314.6启动组态王........................................................29结论...................................................................32致谢...................................................................37参考文献...............................................................38ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF天津轻工职业技术学院毕业论文ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF第4页共39页1引言1.1温度控制系统的意义温度及湿度的测量和控制对人类日常生活、工业生产、气象预报、物资仓储等都起着极其重要的作用。在许多场合,及时准确获得目标的温度、湿度信息是十分重要的,近年来,温湿度测控领域发展迅速,并且随着数字技术的发展,温湿度的测控芯片也相应的登上历史的舞台,能够在工业、农业等各领域中广泛使用。1.2温度控制系统背景自70年代以来,由于工业过程控制的需要,特别是在微电子技术和计算机技术的迅猛发展以及自动控制理论和设计方法发展的推动下,国内外温度控制系统发展迅速,并在职能化、自适应、参数自整定等方面取得成果,在这方面,一日本、美国、德国、瑞典等国技术领先,都产生了一批商品化的、性能优异的温度控制器及仪器仪表,并在各行各业广泛应用。温度控制系统在国内各行各业的应用虽然十分广泛,但从国内生产的温度控制器来讲,总体发展水平仍然不高,同日本、美国、德国等先进国家相比仍然有着较大的差距。目前,我国在这方面总体水平处于20实际80年代中后期水平,成熟产品主要以点位控制及常规的PID控制器为主,它只能适应一般温度系统控制,难于控制滞后、复杂、时变温度系统控制。而适应于较高控制场合的智能化、自适应控制仪表,国内技术还不十分成熟。形成商品化并在仪表控制系统参数的自整定方面,还没开发性能可靠的自整定软件。参数大多靠人工经验及我国现场调试来确定。随着科学技术的不断发展,人们对温度控制系统的要求越来越高,因此,高精度、智能化、人性化的温度控制系统是国内外必然发展趋势。1.3研究技术介绍ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF天津轻工职业技术学院毕业论文ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF第5页共39页1.3.1传感技术传感技术、通信技术和计算机技术是现代信息技术的三大基础技术。中华人名共和国国家标准GB76651987对传感器(transducer/sensor)的定义是能感受规定的被测量并按照一定规律转换成可用输出信号的器件或装置,通常由敏感元件和转换元件组成。其中,敏感元件是指直接感受或响应被测量的部分转换元件是指传感器中能将敏感元件或响应的被测量转换成适于传感器或被测量的电信号部分。对生产过程的监控首先离不开采集设备工作信息,因此选用合适的传感器至关重要,如果把计算机看作是自动化系统的大脑,信道看作是神经网络的话,那么传感器就是自动化系统的五官。无法对现场数据进行准确、可靠、实时测量,监控也就无从谈起了。1.3.2PLC可编程控制器的英文名称是ProgrammableLogicController,即可编程逻辑控制器,简称PLC。现代制造业必须对市场需求做出快速反应,生产小批量、多品种、多规格、低成本和高质量的产品,这便要求生产设备和自动化生产线的控制系统必须具有极高可靠性和灵活性。可编程控制器正是顺应这一潮流而出现的,以微处理器为基础的通用工业控制装置。在20世纪60年代的汽车制造业,传统继电接触器控制装置广泛应用于生产流水线的自动控制系统中。这套装置设备体积庞大,可靠性差,同时维护不便,而且,完全由逻辑硬件构成,接线十分复杂。一旦生产过程某一环节发生改变,控制装置就要重新设计改造。随着汽车生产工业的迅猛发展,对于汽车型号频繁改进,传统控制系统捉襟见肘,弊端日益放大,最终PLC应运而生。它开创性地引入程序控制功能,使计算机科学技术进入工业生产控制领域应用。早期PLC仅仅是替代继电器控制装置完成顺序控制、定时等任务,但是其简单易懂、安装方便、体积小、能耗低、有故障显示、能重复使用的特点,使得PLC很快就得到了推广应用。随着超大规模集成电路技术和微处理器性能的飞速发展,PLC的软、硬件功能不能丰富、完善。ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF天津轻工职业技术学院毕业论文ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF第6页共39页国际电工委员会(IEC)对PLC的正式定义可编程控制器是一种数字运算操作的电子系统,专为工业环境应用而设计,它采用一类可编程的存储器,用于其内部存储程序、执行逻辑运算、顺序控制、定时、计数与算术操作等面向用户的指令,并通过数字或模拟或输入/输出控制各种类型的机械或生产过程。可编程控制器及其有关外部设备,都按易于与工业控制系统联成一个整体、易于扩充其功能的原则设计。PLC技术发展至今已十分成熟,生产PLC产品的厂家多达200多个,其中较著名有德国的西门子(Siemens)公司、美国的Rockwell自动化公司所属的AB(AllenBradly)公司、GEFanuc公司、法国的施耐德(Schneider)公司、日本的三菱公司和欧姆龙(OMRON)公司。1.3.3上位机即便远离生产现场,操作人员仍可以通过远程计算机即上位机直接向生产设备发出控制指令的。上位机屏幕上可以动态实时显示各种信号变化(液压,水位,温度等),便是人机界面(HumanMachineInterface)。而下位机是获取设备状况及直接控制设备的计算机,一般是PLC或单片机。1.3.4组态软件组态软件,处在自动控制系统监控层一级的软件平台和开发环境,使用灵活的组态方式,为用户提供快速构建工业自动控制系统监控功能的、通用层次的软件工具。在组态软件出现之前,工控领域的用户通过手工或委托第三方编写HMI(人机接口软件)应用,开发时间长、效率低、可靠性差或者购买专用的工控系统,通常是封闭的系统,选择余地小,往往不能满足需求,很难与外界进行数据交互,升级和增加功能都受到严重的限制。组态软件的出现使用户可以利用组态软件的功能,构建一套最适合自己的应用系统。随着工业自动化水平的迅速提高,计算机在工业领域的广泛应用,种类繁多的控制设备和过程监控装置在工业领域的应用,传统的工业控制软件已无法满足用户的各种需求。在开发传统的工业控制软件时,一旦工业被控对象有变动,就必须修改其控制系统的源程序,导致其开发周期长已开发成功的工控ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF天津轻工职业技术学院毕业论文ormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormSelection.ParagraphFormaaaaaaaaaaaaaaaaaaaaaaaaaaaat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPointselection.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFormat.LineSpacingLinesToPoction.ParagraphFormat.LineSpacingLinesToPoints2Selection.ParagraphFaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahF第7页共39页软件又由于每个控制项目的不同而使其重复使用率很低,导致它的价格昂贵。通用工业自动化组态软件能够很好地解决传统工业控制软件存在的种种问题,使用户能根据自己的对象和控制目的的任意组态,完成最终的自动化控制工程。

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