基于PLC的发电机检测控制系统设计摘要本系统设计的发电机检测控制系统主要由可编程控制器、探测器、执行机构等组成。可编程控制器作为控制系统的大脑,按照工艺说明分析,对各种外部输入信号按照发电机检测系统的工艺分析结果及程序设计流程,完成系统各项工艺功能的实现,通过仿真将当前的状态进行显示和参数设定等控制。按照方案的选择和设备型号的选择,采用的可编程控制器为西门子S7-300CPU313C,模拟量扩展模块为EM331。确定该系统设计的工艺控制方案,完成系统硬件部分的型号选择计算以及总体控制方案的设计。在此基础上进行硬件分析和图纸设计,完成工艺流程图的设计以及程序的编写,通过程序仿真设计调试和修改,系统安全可靠、使用灵活、扩展性强、开发周期短,后期修改方便,达到本设计的工艺要求,以及为后期系统升级改造创造条件。关键词:发电机检测;可编程控制器;仿真设计AbstractThegeneratordetectionandcontrolsystemdesignedbythissystemismainlycomposedofprogrammablecontroller,detector,actuatorandsoon.Asthebrainofthecontrolsystem,theprogrammablecontrollercompletestherealizationoftheprocessfunctionsofthesystemaccordingtotheprocessanalysisresultsandtheprogrammingprocessofthegeneratordetectionsystem.Thecurrentstateisdisplayedandtheparametersaresetbysimulation.Accordingtothechoiceofschemeandequipmenttype,theprogrammablecontrollerisSiemensS7-300CPU313CandtheanalogexpansionmoduleisEM331.Determinetheprocesscontrolschemeofthesystemdesign,completethemodelselectioncalculationofthehardwarepartofthesystemandthedesignoftheoverallcontrolscheme.Onthisbasis,hardwareanalysisanddrawingdesignarecarriedout,processflowchartdesignandprogrammingarecompleted.Throughprogramsimulationdesigndebuggingandmodification,thesystemissafeandreliable,flexibleinuse,stronginexpansibility,shortindevelopmentcycle,convenientinlatermodification,whichmeetstheprocessrequirementsofthisdesign,andcreatesconditionsforlatersystemupgradeandtransformation.Keywords:generatordetection;programmablecontroller;simulationdesign1目录摘要......................................................................01绪论....................................................................31.1课题研究的目的及意义...............................................31.2课题研究的内容.....................................................41.3课题研究的思路分析.................................................42发电机检测控制系统的总体设计.............................................62.1发电机检测控制系统的工艺分析.......................................62.2可编程控制器的介绍及选型...........................................62.2.1可编程控制器的结构............................................72.2.2可编程控制器的接口电路........................................72.2.3可编程控制器的选型............................................82.2.4模拟量扩展模块的选型..........................................92.3电流互感器的选型...................................................92.4温度传感器的选型..................................................102.5系统方案的确定....................................................103发电机检测控制系统的硬件图纸设计........................................113.1硬件设计的思路分析................................................113.2主电路的接线设计..................................................113.3I/O分配设计......................................................123.3可编程控制器的接线设计............................................133.4模拟量扩展模块的接线设计..........................