毕业设计（论文）题目：基于PLC的液位控制系统-下位机设计学生姓名：学号：专业：电气工程及其自动化班级：1126班指导教师：2015年5月22日I摘要摘要随着当今社会科学技术的迅猛发展，各类监测并调控液位系统对自动化程度的要求也越来越高，原有的水位控制系统，已远远不能满足当前高度自动化的需要。本课题是研究通过PLC系统来控制水位，监控组态来模拟监控界面，实现生产的自动化，可视化。本课题首先设计PLC控制系统，根据要求实现的功能分配IO口，接线，然后编制通过V4.0step7软件进行梯形图的编辑、运行，并把现场的水塔水位状况实时传送给上位机，上位机采用力控组态软件进行监控。监控组态界面是通过ForceContro7.0进行监控界面的编写、运行。首先设计监控界面设置通信参数和IO口，使得上下位机能够可靠通信。本水位控制系统以PLC为控制核心，具备开始和停止功能，这是一种PLC控制的自动调节控制系统。应用此控制系统能显著提高劳动效率，减少劳动强度。关键词：PLC监控组态STEP7力控AbstractAbstractWiththerapiddevelopmentofscienceandtechnologyintoday'ssociety.Allkindsofmonitoringandcontrolsystemofliquidlevelofautomationareincreasinglyhighrequirements.Theoriginalcontrolsystemofwaterlevel,cannotmeetthecurrentneedsofthehighlyautomated.ThisprojectistoresearchthroughthePLCsystemtocontrolwaterlevelmonitoring,configurationsimulationmonitoringinterface,realizingproductionautomation,visualization.Inthispaper,thedesignofPLCcontrolsystem,accordingtothefunctionalrequirementstoachievethedistributionofI/O,thenthepreparationofwiring,editing,operationladderthroughV4.0step7software,andthewaterlevelsceneofthereal-timetransmissiontothePC,PCmonitoringusingForceContro7.0configurationsoftware.Theconfiguration,operationmonitoringinterfaceiseditedbyForceContro7.0software.First,themonitoringinterfacedesign,communicationparameterssettingandI/Oport,thecomputercanreliablecommunication.ThewaterlevelcontrolsystemusingPLCasthecontrolcore,haveopenandallstopfunction,thisisakindofautomaticcontrolsystemPLCcontrol.Theapplicationofthiscontrolsystemcansignificantlyimprovetheworkefficiency,reducelaborintensity.Keyswords：PLCconfigurationstep7forcecontrolIII目录目录摘要..............................................................IAbstract...........................................................II第一章绪论.........................................................11.1设计的意义及目的.............................................11.2课题的发展现状..............................................11.3本设计主要工作..............................................2第二章PLC及SIEMENSS7-200.........................................32.1PLC概述.....................................................32.1.1PLC的产生及发展.......................................32.1.2PLC的组成.............................................42.2PLC的特点、性能及分类.......................................92.2.1PLC的特点.............................................92.2.2PLC的性能指标........................................102.2.3PLC的分类及应用......................................112.3SIEMENSS7-200系列PLC.....................................122.3.1S7-200系统组成.......................................122.3.2S7-200内存结构.......................................122.3.3S7-200寻址方式.......................................132.3.4S7-200控制指令.......................................14第三章液位控制系统硬件设计........................................163.1PLC选型....................................................163.2液位传感...
