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1、购买设计文档后加Q-97666224免费领取CAD图纸ApplicationofPLCPLCisonekindspeciallyforthedigitaloperationoperationelectronicinstallationwhichappliesundertheindustryenvironmentdesigns.Itusesmaythecodingmemory,usesforinitsinternalmemoryoperationandsoonactuatinglogicoperation,sequenceoperation,time,counting
2、andarithmeticoperationinstructions,andcanthroughdigitalorthesimulation-likeinputandtheoutput,controlseachtypethemachineryortheproductionprocess.PLCandtherelatedauxiliaryequipmentshouldaccordingtoformawholeeasywiththeindustrialcontrolsystem,easytoexpanditsfunctiontheprincipletodesign.”I
3、nthe1970sthelaststage,theprogrammablecontrollerenteredthepracticalapplicationdevelopmentphase,thecomputertechnologyhasintroducedincomprehensivelytheprogrammablecontroller,causesitsfunctiontohavetheleap.Thehigheroperatingspeed,thesubminiaturevolume,themorereliableindustryantijammingdesi
4、gn,thesimulationquantityoperation,thePIDfunctionandtheextremelyhighperformance-to-priceratiohasestablisheditinthemodernindustrystatus.Intheearly-1980s,theprogrammablecontrollerhasobtainedthewidespreadapplicationintheadvancedindustrialnation.Thistimeprogrammablecontrollerdevelopsthechar
5、acteristicislarge-scale,thehighvelocity,thehighperformance,theproductseriation.Thisstage'sanothercharacteristicisintheworldproducestheprogrammablecontroller'scountrytoincreasedaybyday,theoutputrisesdaybyday.Thissymbolizesthattheprogrammablecontrollermarchedintothematurestage.The20thcen
6、turylaststage,theprogrammablecontroller'sdevelopmentcharacteristicwasevenmoreadaptsinthemodernindustryneed.Fromthecontrolscale,thistimehasdevelopedthelarge-scalemachineryandsubminiaturemachine;Fromthecontrol,wasbornvariousspecialfunctionunit,usedinthepressure,thetemperature,therotation
7、alspeed,thedisplacementandsoonallkindsofcontrolsituation;Fromproductnecessaryability,hasproducedeachkindofman-machinecontactsurfaceunit,thecorrespondenceunit,causedtoapplytheprogrammablecontroller'sindustrialcontrolequipmentnecessarytobeeasier.Atpresent,theprogrammablecontrollerindom
