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1、导专宾颃蝴鸶籴徂帘阄PLCPLCnameinEnglishProgrammableLogicController,theChinesecalledtheprogrammablelogiccontroller,basedoncomputertechnologyisanewtypeofindustrialcontroldevices.Itusesaclassofprogrammablememory,foritsinternalstorageprocedures,theimplementationoflogicoperations,s
2、equencecontrol,timing,countingandarithmeticoperations,suchasuser-orientedinstruction,anddigitaloranaloginput/outputcontrolofalltypesthemechanicalorproductionprocess.PLCisaprogrammablelogiccircuits,andhardwareisalsoaverystrongcombinationoflanguage,inthesemiconductorha
3、saveryimportantapplication,isaplacewheretheresemiconductorPLC.Itsmainfeaturesincludethefollowing:汁衡唉默卸刁蜣屠狐帙1.Highreliability,stronganti-interferenceabilityHighreliabilityofelectricalcontrolequipmentisthekeytoperformance.PLCasaresultoftheuseofmodernlarge-scaleintegrat
4、edcircuittechnology,strictproductionprocess,theinternalcircuittotakeanadvancedanti-jammingtechnology,withhighreliability.Forexample,theproductionoftheMitsubishiFseriesPLCMTBFofupto300,000hours.SomeuseofthePLC'sCPUredundancyMTBFlongerworkinghours.FromthePLCcircuitofth
5、emachine,theuseofPLCcontrolsystemconstitutes,andthesamesizeoftherelaycontactsystem,electricalwiringandtheswitchcontacthasbeenreducedtoafewhundredsoreventhousandths,faultwillbegreatlyreduced.Inaddition,PLChardwarefailurewithself-detection,failurealarminformationintime
6、.Intheapplicationsoftware,theapplicationalsocanbeincorporatedintotheexternaldevicefaultself-diagnosisprocedure,thesysteminadditiontothecircuitoutsidethePLCandequipmenthasalsobeentheprotectionFaultself-diagnosis.Inthisway,theentiresystemwithextremelyhighreliabilityisn
7、otstrange.翱崇淮求杼盯诟姚只泰2.Completepackage,perfectfunctionsandapplicabilityDevelopmentofPLC,haveformedlarge,mediumandsmallseriesproductsofallsizes.Ofallsizescanbeusedforindustrialcontroloccasions.Inadditiontothelogicalprocessingfunctions,themostmodernPLCequippedwithasophi
8、sticatedcomputingpowerdatacanbeusedinavarietyofdigitalcontrol.PLCinrecentyearsalargenumberoffunctionalunits,sothatpenetrationtothep
