TechnologyandApplicationofFieldbusControlSystem---------IntelligentEquipment&MeasurementAndControlSystemBadonDeviceNet
Promotedbythenewtechnologicalrevolutionthatautomationcontroltechnologyistendingdigitizationandinternetinthefieldofautomationindustry,ShanghaiAtonElectricCo.,Ltd.developedIntelligentEquipment&MeasurementAndControlSystemBadonDeviceNetasahighandnewtechnologyindustrializationmodelproject.Itwasastatehi-techdevelopmentprojectof2000andwasapprovedbytheStateCommitteeofTechnology.ShanghaiAtonElectricCo.,Ltd.constructedproductionlineofintelligentcontrollerofpumpandvalve,relyingonShanghaiElectric(Group)Corporation;constructedmeasurementandcontrolsystemFCSR&DcenterofintelligentcontrollerofpumpandvalveandbuiltupmassproductionR&Dbasis,cooperatingwithShanghaiJiaotongUniversityandShanghaiUniversity;constructedFCSremotediagnosisandrvicecenterofintelligentcontrollerofpumpandvalve;constructedFCStrainingcenterofintelligentcontrollerofpumpandvalve;foundedmassproductionR&DbasisalongwiththeRockwellLaboratoryofShanghaiJiaotongUniversityandCIMSCenter.
1Summary
(1)Fieldbuscontrolsystemisasystemappliedtofieldofproductionandmicrocomputerizedmeasurementcontrolequipmenttorealizeboth-waymultinoderialcommunications.Itisalsocalledlow-levelcontrolnetworkforopen,digitalandmultiplespotcommunications.
Application:FlowControlSystemofManufacturing;ProcessControlSystem;TrafficControl&Management;BuildingAutomation.Features:Fieldbuscontrolsystemislow-levellow-bandwidthdigitalcommunicationandcontrolnetworkinindustrialsystemaswellasopensystemconnectingmicrocomputerizedappearance.Intelligentinstrumentandcontrollerareequaltomicrocomputer.TheymakeupnetworkwithFieldbuscontrolsystemasthelinkstocompletedigitalcommunicationandothertasks.
(2)DifferencebetweenFCSandDCS,FCSisupdatedcontrolsystemafterDCSintegratedwithdigitalcontrolsystemanddistributingcontrolsystem.ItsolvestheproblemthatintraditionalDCS,devicesmadebydifferentmanufacturerscannotbeconnected.Theycan'trealizeexchangeandoperationtoorganizeannetworksystemwithwiderrangeofinformationsharing.ItconquersthedefectthatspecialclodsystemfornetworkshouldbeudforcommunicationinDCStorealizevariousfunctionsofintegratedautomation.ItturnsthedistributingstructurecombiningconcentrationwithdeconcentrationinDCSintonew-typefulldistributingstructure.Itreleasthecontrolfunctiontothefieldthoroughlyandmakesitpossibletorealizebasiccontrolfunctionbymeansoffieldbuquipmentitlf.FCSbreaksthetraditionalstructureformofcontrolsystem.Thetraditionalanalogcontrolsystemadoptsone-to-oneequipmenttie-wireandputsupconnectionsrespectivelyaccordingtocontrolloop.FCSadoptsintelligentfieldequipmenttoplacethecontrolmodule,allinput/outputmodulesthatudtobeinthecontrolchamberofDCSintofieldequipment.Sincefieldequipmenthasabilitytocommunicate,thefieldmeasuringandtransferringinstrumentscantransfersignalstoactuatingmechanismsuchasvalvedirectly.Itscontrolfunctioncanbefulfilleddirectlyonthespotindependentofthecomputerorcontrolmeterinthecontrolchamber,whichrealizesthoroughdecentralizedcontrol.
FCSadoptsdigitalsignalstoreplaceanalogsignalssothatmultiplesignals(includingmultipleoperatingparametervalues,devicestatusandfailureinformation)canbetransferredonapairofcables.Meanwhile,itcangivepowersupplytoveraldevices.Noswitchedblockforanalog/digitalordigital/analogisneededbesidesfieldbus.
(3)CharacteristicsofFCS
●OpenSystem;
●Interoperability;
●replaceabilityofdevicesmadebydifferentmanufacturers.
●IntelligentizeandAutonomy;
●Fieldequipmentcompletingbasicfunctionsofautomaticcontrol.
●DecentralizedSystemStructure;
●FieldAdaptability;
●RelativelyStrongInterferenceKillingFeatureandSafety
●Intelligentizedlocalequipmentcansaveinvestmentandquantityofhardware
●Savinginstallationexpensandcables
●Savingdailymaintenanceexpens
●Enhancingaccuracyandreliabilityofsystem
●Enhancinginitiativenessofsystemintegrationforurs
(4)DevelopmentBackgroundandTrendofFieldbusControlSystem,Withtherapiddevelopmentofcomputerandcomputernetwork,FCShasbeenrapidlydevelopedastheinterlinkedcommunicationnetworkbetweenthefieldintelligentdevicesinthefieldofprocessautomation,buildingandtrafficetc.BecauFCSmeetstheneedsthatindustrialcontrolsystemisdevelopinginthewayofdecentralization,networkandintellectualized,ithasbecomethefocusofglobalindustrialautomationandbeenuniversallyconcernedbythewholeworld.FCShascaudgreatrevolutionsontheaspectsofsystemstructureandfunctionsystemforthecurrentproductionofautomationinstrument,distributingcontrolsystemandprogrammablecontroller.ItispredictedthatFCSwillbethegeneraltrendsinaverylongtimeinthefutureforesure.
2APPLICATIONOFRELAY
Theproductreliabilitygenerallyreferstotheoperatingreliability.Itisdefinedas:theabilityofaccomplishingthespecifiedfunctionunderprescribedconditionsandinprescribedtime.Itconsistsofintrinsicreliabilityandapplicationreliability.Theintrinsicreliabilityisdeterminedbyproductdesigningandmanufacturingtechnique,andtheapplicationreliabilityisconcernedwiththecorrectapplicationofursandthervicesprovidedbythemanufacturerbeforeandafterlling.Whenusingrelay,theurshouldpayattentiontothefollowingitems.
2.1Coilappliedvoltage
Itisbesttochoothecoilapplicativevoltageaccordingtotheratedvoltageindesign,orchoothevoltageaccordingtothetemperaturerisingcurve.Usinganycoilvoltagethatislessthantheratedvoltagewillaffecttheoperationoftherelay.Thecoiloperatingvoltagereferstothevoltagethatisappliedbetweenthecoilterminals.Thevoltagevaluebetweenthetwoterminalsmustbeguaranteed,especiallywhenusingenlargementcircuittoenergizethecoil.Whereas,itwillalsoaffecttherelaycharacteristicsiftheappliedvoltageexceedsthehighestratedvoltage.Exorbitantvoltagewillbringexorbitantcoiltemperaturerising,especiallyinhightemperatureambient.Exorbitanttemperaturerisingwilldamagetheinsulatingmaterialandaffecttheworkingsafetyofrelay.Formagneticlatchingrelay,energizing(orreturn)pulwidthshouldnotlessthan3timesoftheoperating(orreturn)time,otherwi,therelaywouldbeleftonthemiddle-positionstate.Whenusingsolid-statecomponentstoenergizethecoil,thecomponentsdielectricstrengthmustbeabove80V,andtheleakageofcurrentmustbeaslittleaspossibletoensuretherelaytorelea.
Energizingpowersource:Under110%oftheratedcurrent,theadjustingratioofthepowersourceislessthan10%(ortheoutputimpedanceislessthan5%ofthecoilimpedance),thewavevoltageoftheDCpowersourceislessthan5%.TheACwaveissinewave;thewavinesscoefficientisbetween0.95~1.25;wavedistortioniswithi
n±10%;thefrequencychangeiswithin±1Hzor±1%ofthespecifiedfrequency(choosingthebiggervalue).Theoutputpowershouldnotlessthancoilpowerconsumption.
2.2Transientsuppression
Atthemomentwhenthecoilpowerisstopped,peak-invervoltagethatismorethan30timesofthecoilratedvoltageisproducedonthecoil,whichisharmfultotheelectroniccircuit.Generally,thepeak-invervoltageissuppresdbytransientsuppression〔cutting-peak〕diodeorresistancetolimitthepeak-invervoltagewithin50V.Butthediodeinparallelconnectionwilldelay3~5timesofthereleatime.Iftherequestofthereleatimeishigh,asuitableresistanceinriescanbeputtedwithandatoneendofthediode.Thepowersupplytorelaysinparallelconnectionandriesconnection,Whenveralrelaysinparallelconnectionaresupplied,therelaythatthepeak-invervoltageishigherwillreleapowertotherelaysthatthepeak-invervoltageislower.Thereleatimeoftherelaywilldelay.Sotherelaysinparallelconnectionshouldbecontrolledparatelytoeliminatemutualinfluence.
Therelayswithdifferentcoilresistanceandpowercan’tbeudinries,otherwi,therelaythatthecoilcurrentishigherintheriescircuitcan’toperatereliably.Onlytherelaysofthesamespecificationcanbeudinries,butthepeak-invervoltagewillbeincreadandthepeak-invervoltageshouldbesuppresd.Resistanceinriescanbeudtobearthepartvoltagethatexceedstheratedvoltageofthecoilaccordingtotheratioofthedividedvoltage.
Contactload
Theloadappliedtothecontactsshouldbeaccordanttotheratedloadandcharacteristicsofthecontacts.Aloadthatisnotappliedaccordingtotheratedvaluerangewillcauproblem.TherelaythatisonlysuitableforDCloadcan’tbeudinACoccasions.Therelaythatcanswitch10Aloadcan’talwaysreliablyoperateinlowlevelload(lessthan10mA×6A)orindrycircuitoccasions.Therelaythatcanswitchsingle-phaACpowersourceisn’talwayssuitabletoswitchtwosingle-phaACloadsthataren’tsynchronous;therelaythatisonlyspecifiedtoswitchtheloadofAC50Hz〔or60Hz〕can’tbeudtoswitchACloadof400Hz.
Parallelandriesconnectionofcontacts
Thecontactsudinparallelconnectioncan’tincreatheloadcurrent,becautheoperatingtimesofveraltsofcontactsareabsolutelydifferent;thatistosay,thereisstillonlyatofcontactsswitchingtheincreadload.Thiswoulddamageorweldthecontactsandmakethecontactscan’tclooropen.Theparallelconnectionofthecontactscandecreathemisplayof“break〞.Buttheparallelconnectionofthecontactswouldincreathemisplayof“freezing〞.Becauthemisplayof“break〞isthemainpatternofinvalidationofcontacts,theparallelconnectioncanincreathereliabilityandcanbeudonthepivotalpartofequipments.Buttheappliedvoltageshouldnotexceedthehighestoperatingvoltageofthecoilandshouldnotlessthan90%oftheratedvoltage,otherwi,thecoillifeandtheapplicativereliabilitywouldbedamaged.Theriesconnectionofthecontactscanincreatheloadvoltage.Theamountofthecontacttsiqualtothetimesthattheloadvoltagecanbeincread.Theriesconnectionofcontactscandecreathemisplayof“freezing〞,butitwouldincreathemisplayof“break〞.Anyway,whenusingredundanttechnologytoincreatheoperatingreliabilityofcontacts,thecharacteristicsandsizeandthefailuremodeofloadmustbeconsidered.
Switchingspeed
Theswitchingspeedshouldnotexceedthereciprocalof10timesofthesumofoperatingandreleatime(times/s),otherwi,thecontactscan’tswitchonsteadily.Magneticlatchingshouldbeudunderthepulwidthspecifiedinthetechniquecriterion,orthecoilmaybedamaged.
3RVTDISTRIBUTINGELECTRICITYINTEGRATETESTAPPARATUS
Basicfunction
Measureasupervision:Threemutuallyelectricvoltage/electriccurrent/powerfactorwithagreatachievement/powerwithoutagreatachievement/electricitywithagreatachiverment/electricity/homophonic-waveelectricvoltage/homophonic-waveelectric/currentDayelectricvoltage/electriccurrentbiggestandminimumvalue/fireforthefailureElectricvoltageovertop,thelimit/lackmutuallyoftimehomophonic-waveanalyzesisupto13times.Thedataisstoredfor2months.
Thedatacommunicate
RS232/485communicatingconnect,Thewayincommunicatingcanadoptthespotcommunicatingorthelongrangecommunicating.,Possibletottleinvokeorthesolidhourinvokes,respondingtothemodificationandlongrangescontroloftheparameter.
Withoutpowercompensation
Takingphysicsmeasuresasthepowerfactorwithoutagreatachievement,thepowerfactorwithagreatachievementandthedullplacewithoutpowercompensation;Y+thecombinationmethodofthe△,Y+the△connectsthelinemethod,Y+△,Y,the△connectsthelinemethod.
Datamanagement
AccordingtoWINDOW98operationterrace,dataincommunicationautomaticallyreportsbornstatement,curveandpillarformdiagrams.
Circulationoftheprotection
Whenthechargedbarbedwirenetofmutuallyelectricvoltageoverpress,owetopress,andasuperlimithourfastcutoffinexpiationofcapacitor,Whenthechargedbarbedwirenetlacksmutuallyorsuperlimitintheprefaceofzerohourfastcutoffinexpiationofcapacitor.
screenmanifestation
Chineoperationinterface,Adopt128*64thebacklightliquidcrystaldisplay.Thesolidhourshowsthechargedbarbedwirenetrelevantparameter.viewmanifestationtoplacetheparameter.
现场总线控制系统的技术和应用
随着新的科学技术革命的出现,在自动化工业领域中,自动控制技术的开展趋向于数字化和网络互联化。上海Aton电气在基于DeviceNet网络协议研制了智能设备、智能测量法和只能控制系统,建立了工业化高新技术工程模型。这是2000年国家重点开展的高科技工程,并且由国家科技委员会认可。通过上海电气集团,上海Aton电气构造了***和阀门的智能控制器的的生产线;创立了***和阀门的智能控制器的现场控制系统的研发中心,通过和上海交通大学和上海大学的合作,建立了产品集成的研发根底;建立了***和阀门的智能控制器的现场控制系统的远程诊断和效劳中心;建立了***和阀门智能控制系统的现场控制系统的培训中心;通过和上海交通大学洛氏实验室和计算机集成制造系统中心的合作,建立了集成产品研发的根底。
1概要
〔1〕现场总线控制系统就是应用于制造业中和应用微机和测量控制设备来实现多点双工的连续通信的系统。它也被称为是开放式、数字化和多点通信的低级控制网络。
应用:制造业中流程控制系统
过程控制系统
交通的控制和管理
