基于PLC的水塔水位控制系统设计

本科毕业设计（论文）题目基于可编程控制器的水塔水位控制系统设计学生姓名专业班级学号院（系）指导教师完成时间本科毕业设计任务书题目基于可编程控制器的水塔水位控制系统设计专业学号姓名主要内容、基本要求、主要参考资料等：水塔是确保生活用水、生产用水的重要装备之一。鉴于此，本课题拟以西门子公司S7-200系列可编程控制器以及水位传感器为核心器件，实现水塔水位的测量、显示以及水位控制。要求如下：1.查阅技术资料，研究论证水塔水位控制系统构成方案；2.论证并选择水塔水位传感器；3.硬件方案、输入/输出点数确定以及相关硬件电路设计；4.进行PLC软件设计与调试；5.模拟调试；6.相关技术文档整理和毕业设计说明书编写。主要参考资料：1．现代电气控制及可编程控制器技术相关著作教材；2．其他文献资料若干。完成期限：指导教师签名：专业负责人签名：年月日基于可编程控制器的水塔水位控制系统设计I基于可编程控制器的水塔水位控制系统设计摘要在恒压无塔供水系统取得较大发展的今天，传统的水塔供水系统以其低廉的价格和操作的简便在工农业生产和日常生活中仍然具有广泛的应用，在对水压要求不高以及水位现场高度较低的情况下，以用水塔进行供水为主。本系统采用西门子公司生产的S7-200系列可编程控制器作为控制核心，用液位传感器采集水塔现场的水位信号，通过文本显示器设定或显示相关参数，利用可编程控制器的继电器输出控制水泵对水塔供水或停水，使水塔水位保持在相对稳定的范围，保证工农业生产的顺利进行和日常生活中对用水的需求。关键词过程控制PLC水塔水位基于可编程控制器的水塔水位控制系统设计IIDESIGNOFWATERTOWERLEVELCONTROLLINGSYSTEMBASEDONPLCABSTRACTInthetimeofconstantpressurewithouttowerwatersystemshaveachievedagreaterdevelopment,thetraditionalwatertowerwatersupplysystemforitslowpriceandsimplicityofoperationinindustrialandagriculturalproductionanddailylifeisstillwidelyused,inwaterpressurelessdemandingandwaterlevelinthesceneatlowaltitudes,themainsupplyofwaterwithawatertower.ThissystemuseSiemensS7-200seriesprogrammablecontrollerasitscontrolunit,andusethesignallevelsensortocollectthewaterlevelofthewatertowersite,thenthroughthetextdisplaytosettingordisplaytheparameters,therelayoutputofprogrammablecontrollertocontrolpumpthewatertowerwatersupplystartorstop,makethewatertowerwaterlevelmaintainedatarelativelystablerange,tomakesurethesmoothprogressoftheindustrialandagriculturalproductionanddailylifeinthedemandforwater.KEYWORDSprocesscontrolPLCwaterleveloftower目录中文摘要.............................................................................................................................I英文摘要...........................................................................................................................II绪论......................................................................................................................................11S7-200可编程控制器..............................................................................................31.1S7-200可编程控制器的组成.....................................................................31.2S7-200可编程控制器的工作原理............................................................52液位传感器的选型...................................................................................................72.1液位传感器的分类及选用方法.................................................................72.2静压投入式液位传感器的工作原理..................................................73硬件方案的设计.......................................................................................................93.1总体方案...........................................................................................................93.1.1控制方案的分析.........................................................................................93.1.2控制系统的I/O点及地址分配..................................................................93.2PLC系统的选型.............................................................................................93.2.1CPU模块....................................................................................................93.2.2扩展模块...................................................................................................103.2.3文本显示器...............................................................................................103.3电源的设计....................................................................................................113.4硬件接线图....................................................................................................113.5主电路接线图................................................................................................113.6元器件清单....................................................................................................124软件的设计...............................................................................................................134.1程序流程图....................................................................................................134.2文本显示器的组态......................................................................................134.3程序设计.........................................................................................................184.3.1主控制程序...............................................................................................184.3.2液位显示程序...........................................................................................184.3.3液位上下限值设定程序...........................................................................194.3.4液位上下限设定值限制程序...................................................................20结束语...............................................................................................................................21致谢....................................................................................................................................22参考文献..........................................................................................................................