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1、谢谢阅读06旅游景区场务工作管理制度1旅游景区场务工作管理制度二○一三一月一日manipulatorcontrolmodeandprogrammablecontrollersintroduction2.1Selectdiscussionwithmanipulatorcontrol2.1.1classificationofcontrolrelaysanddiscreteelectroniccircuitcancontrololdindustrialequipment,butalsomorecommon.Mainlythesetw
2、orelativelycheapand谢谢阅读谢谢阅读youcanmeettheold-fashioned,simple(orsimple)industrialequipment.Sohecanseethemnow,howeverthesetwocontrolmodes(relayanddiscreteelectroniccircuits)arethesefatalflaws:(1)cannotadapttothecomplexlogiccontrol,(2)onlyforthecurrentproject,thelackof
3、compatibilityand(3)notreformingthesystemwithequipmentimprovements.SpringforthedevelopmentofChina'smodernindustrialautomationtechnologythesubstantialincreaseinthelevelofindustrialautomation,completedtheperfectrelayofthecomputertoomuch.Intermsofcontrollingthecomputers
4、howedhistwogreatadvantages:(1)eachofthehardwarecanbeinstalledononeormoremicroprocessors;(2)theofficialdesignerofthesoftwarewritingcontentcontrolisallabout.Nowinseveralwaysinthecontextofindustrialautomationcanoftenbeseeninthreeways:(1)ProgrammableLogicalController(re
5、ferredtoasIPC);(2)DistributedControlSystem(DCSforshort),and(3)theProgrammableLogicalController(PLCforshort).2.1.2PLCandtheIPCandDCScontrastcontrast1,eachofthethreetechnologiesoforiginsanddevelopmentrequirementsforfastdataprocessingmakesitinventedthecomputer.Themenbr
6、oughtintermsofhardwarethere,usingahighlevelofstandardization,canusemorecompatibilitytools,isarichsoftwareresources,especiallytheneedforimmediacyinoperationalsystems.Sothecomputercaneffectivelycontrolisusedtocontrolandmeetitsspeed,onthevirtualmodel,real-timeandincomp
7、utationalrequirements.Distributedsystemstartedwithacontrolsystemforindustrialautomaticinstrumentusedtocontrol,whereasnowitissuccessfullydevelopedintoindustrialcontrolcomputerusedasacentralcollectionanddistributionsystemandtransitionofdistributedcontrolsysteminanalog
8、uehandling,loopcontrol,hasbeguntoreflecttheuseofa谢谢阅读谢谢阅读hugeadvantage.Thoughdistributedsystemhasgreatadvantagesinloopregulation,butonlyas
