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1、WuxiProfessionalCollegeofScienceandTechnology科技论文题目ApplicationofProgrammableLogicControIler系别尚德光伏学院专业计算机控制技术班级0801学生姓名学号指导教师蒋鹏2010年11月ApplicationofProgrammableLogicControllerAbstract:ThispaperintroducesthePLC'shistory,structure,uses,applications,characteristicsandf
2、utureprospectsrelatedtoPLC・ThiscanbethroughacorrespondingunderstandingofthePLC.ItwillbehelpfultoPLCapplications•Keywords:PLC^Application>FeaturesBrieflyProgrammablecontrolleristhelate60sintheUnitedStatesfirst,andthencalledprogrammablelogiccontrollerPLC(Programmable
3、LogicController),aimstoreplacetherelayinordertoimplementthelogictodetermine,timing,countingandothersequentialcontrolfunctions.PLCbasicdesignideaisthecomputerfullyfunctional,flexible,universalandotheradvantagesandrelaycontrolsystem,easytounderstand,easytooperate,che
4、apandcombinetheadvantagesofthecontrollerhardwareisstandard,generic.Basedontheactualapplicationobjects,thesoftwarewillcontrolthecontentcompiledintothecontrolleruserprogrammemory.Controllerandthecontrolledobjecttoconnecteasily.Asthesemiconductortechnology,inparticula
5、rmicroprocessorsandmicro-computcrtechnology,to70afterthemid,PLChasbeenwidespreaduseofmicroprocessorsastheCPU,inputandoutputmodules,andperipheralcircuitsarealsousedinlarge-scaleEvenverylargescaleintegratedcircuits,whenthePLCisnolongerlogicaltodeterminefunction,alsoh
6、asadata-processing,PIDregulator,anddatacommunicationcapabilities.Programmablecontrollerisadigitalcomputingoperationofanelectronicsystemdesignedforindustrialenvironmentapplications・Itusesaprogrammablememory,usedinitsinternalmemoryimplementationofthelogical,sequentia
7、lcontrol,timing,calculationandarithmeticoperationssuchasinstruction,andthroughdigitalaninputsandoutputstocontrolvarioustypesofmechanicalortheproductionprocess.PLCisacomputertechnologywithtraditionalrelaycontactwiththeproductofacombinationofcontroltechnology,whichov
8、ercomestherelaycontactscontrolsystemwiringcomplexityofthemechanicalcontacts,reliabilityandlowpowerconsumptionandhigh,versatilityandflexibilityoft
