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1、翻译原文DCSprincipleandPLCfoundationDCSprincipleandPLCfoundationDCSprincipleDistributedControlSystem(DCS)carriesonthecentralismmonitor,theoperation,themanagementandthedispersercontrolwhichisonekindofnewcontroltechnologyusingthecomputertechnologytotheproductionprocess.DCSisbaseonthecomputerte
2、chnology,thesignalprocessingtechnology,thesurveycontroltechnology,thecorrespondencenetworktechnology,theCRTtechnology,thegraphicaldisplaytechnologyandtheman-machineconnectiontechnologymutuallyseepsthedevelopmenttoproduce.DCSbothisdifferentwiththedispersiblemeasuringappliancecontrol,anddi
3、fferentwithYujiChinesetypecomputercontrolsystem,butovercomesthetwoflawtoconcentratethetwosuperiority,ithasconcentratedfunctionandsoonsteplesscontrol,batchcontrol,logicsequentialcontrol,dataacquisition.BasiccomponentofDCSThelogicstructureofthesystemneedsrealizingbythephysicsstructure.Weca
4、nsumuptheirphysicsstructureasthestructureofthetypeof"agleamofpastthree"simply."firstline"referstoitsskeletoncomputernetwork,"thethree"meansthatjointhreekindsofdifferentkindsofnodesinthenetwork:Faceon-the-spotI/Owhichisaccusedofthecoursescenetocontrolandstand;Facingtheattenbant'soperator'
5、sstation;FacingDCSsupervisetheadministrativestaff'sengineerstanding.I/OcontrolsthestationliveAnon-the-spotI/OiscontrolledandstoodtofinishdealingwithandrealizingthenetworknodeofdigitalcontrolDDC(DirectDigitalControl)directlytoon-the-spotI/Oofcourse,therearethreemainfunctions:1,whichcarrie
6、dondigitizationofvariouskindsofon-the-spotcourseamount(suchastheflow,pressure),andthequantityafterdigitizingisstoredinthememory,formonekeepthesamewithon-the-spotcourseamountly,canone-oneisitvideoinrealtimeaccordingtoactualrunningsituationwithneweron-the-spotcoursequantitytochangeinrealti
7、ming;2,thereal-timedatagatheringourstationaresenttooperator'sstation,standingandotherengineerslivethroughthenetworkFOcontrolthestation,inordertorealizethesupervisionandcontrolofthewholesystem,atthesametimeitisstoodthemessageissuedbyoperator'sstanding,engineerthatcanalsore
