电子系统网络

1、8.FieldBusBasicsFieldBusSystems•Fieldbusismadeupof–Fieldwhichmeansafactory/plantwhichhassensorsandactuatorswithinit–Buswhichmeansadigitalcommunicationsystem•Thisiscombinedtousethedigitalcommunicationssystemtoconnectthesensorsandactuators.传感器执行器FieldBusSystems•FieldbusisthereforeameansofdigitalcommunicationusedinAutomationandProcessSystemstoandfromSensorsandActuatorsfromacontrollersuchasaPLC.•Aprogrammablelogiccontroller(PLC)orprogrammablecontrollerisadigitalcomputerusedforautomationofelectromec。

2、hanicalprocesses,suchascontrolofmachineryonfactoryassemblylines,amusementrides,orlightingfixtures.装配生产线固定装置节点聪明FieldBusSystemsAdvantagesofFieldbusSystems:•ReducedCosts•CablingMaterialReduced•InstallationCostsReduced•CommissioningTimesReduced•Competitionbetweensupplier•EasierMaintenance•EasyExpansion•TroubleshootingSimplified•Intelligencebuiltintothesystem•MoreReliable•ShorterResponseTimes-DistributedControl可靠维护安装调试情报故障排除扩展竞争分布式EN50325-2(Jan.2000)IS62026-3(2000)DeviceNetEN50325-3(Apr.2000)IS62026。

3、-5(2000)SDSEN50325-4(undervote)CANOpenEN50295-2(Dec.1998)IS62026-2(2000)AS-InterfaceEN50170-1(Jul.1996)zIS61158Type4P-NetEN50170-2(Jul.1996)IS61158Type1/3/10PROFIBUSEN50170-3(Jul.1996)IS61158Type1/7WorldFIPEN50170-A1(Apr.2000)IS61158Type1/9FoundationFieldbusEN50170-A2(Apr.2000)IS61158Type1/3PROFIBUS-PAEN50170-A3(Aug.2000)IS61158Type2ControlNetEN50254-2(Oct.1998)IS61158Type8INTERBUSEN50254-3(Oct.1998)(IS61158Type3)PROFIBUS-DP(Monomaster)EN50254-4(Oct.1998)(IS61158Type7)WorldFIP(FIPIOEuroStandards。

4、ENandInternationalStandardsContentsoftheCENELECfieldbusstandards.ThedatesgiveninbracketsarethedatesofratificationbytheCENELECTechnicalBoard[1]FieldBusSystemsProfibusDPFMSDP(DecentralisedPeripherals)•Aimedatthesensor/actuatordevicelevelanditisoptimisedforspeed.•FMSMessagingSystematCellLevel•MostcommonsystemisRS485Twistedpair(TermedH2)(PurpleCable).-LinearBusTopology-ShieldedPairCable-32NodesperSegment127Nodesusingrepeaters-TransmissionSpeedFixed9.6kbits1200m12Mbits100m线性外设屏蔽电缆直放站段FieldBusSystems硕。

5、士奴隶设备FieldBusSystems•Master(PLC/PC)obtainstokenandthencommunicateswiththeslaves(Sensor/Actuatos)itrequires.•Tokenmovestonextmaster,ifthereisone.•Profibus(ProcessFieldBus)isastandardforfieldbuscommunicationinautomationtechnology令牌通讯获取Profibus(ProcessFieldBus)•Connectorscomeindifferenttypesof9pinDType连接器Profibus•ProfibusPA(ProcessAutomation)isanextensionoftheProfibusDPprotocolfordatatransmission.Layer1(physical)inthisstandardusesIEC1158-2,whichprovidesintrinsicsafetyandpoweronthebusforfielddevices。

6、.1158-2modulatesasteady-state10mAdcbasiccurrent(thebuspower)byManchesterencodinga±9mAdcsignalontopofthebasiccurrent.•Manchesterencodingreferstoasignallingtechniquethatproducesbinaryonesandzeroesbytransitioningbetweenhighandlowsignals(+9mAdcto-9mAdcinthe1158-2case)overanelevatedsteady-statevoltageorcurrent.Ahigh-to-lowtransitionisaone,andalow-to-hightransitionisazero.Thus,everybitperiodhasatransitioninit,allowingthereceivertosynchronizeeasilywiththetransmitter.Onedisadvantageisthatitrequirestwice。

7、thebandwidthasstraightbinaryencoding.Profibus•ProfibusDPandProfibusPAcanbeintegratedviaasegmentcoupler.•AndbecauseProfibusDPandProfibusFMS(FieldMessagingSystem)usethesametransmissiontechnologyandauniformbusaccessprotocol,theycanbeoperatedsimultaneouslyonthesamecable.[2]综合耦合器制服协议同时WorldFIPSystemWorldFIP•DistributedRealTimeDatabase•UsesIEC1158-2IntrinsicSafeSystem1.TP(TwistedPair)-slowspeed31.25kbitspowerssensors,2kmlength(H1)2.STP(ShieldedTwistedPair)NonIntrinsicallySafe-speed2.5Mbits,nobuspower(。

8、H2)3.STP(ShieldedTwistedPair)IntrinsicallySafe,-speed1Mb屏蔽扭曲固有ASInterfaceASInterface•OptimisedfortheconnectionofSensorsandActuators•Costeffective•Operationindifficultenvironmentalconditions•Reliableandsafe•Realtimecapable•Applicableuniversally•Easytoinstall•Easytoextend•Opentohigherlevels•Safeagainstinterference•StandardizedEN50295,IEC62026接口ASInterfaceASInterface•Master-slaveprinciple•Nolimitstothestructure•2wirecablefordataandpowerupto8A•Unshieldedcable2x1,5mm²•Safetransmission•4digitalinputs+。

9、4digitaloutputs•Analogvaluetransmission原则FieldBusSystemsASInterface•Infielduse(IP65/67)aswellasintheswitchcabinet•Piercingtechnologies•Cablelength100m,extendableviaRepeaterupto500m•Reliabledatatransmission•Easycommissioning•Addresstobesetviabusconnector文件柜FieldBusSystemsFieldBusSystems•62SlavesatoneMaster/A-andB-Slaves•fulldownwardscompatibility–existingapplicationscanbeextendedbynewmodules–existingSlavescommunicatewithnewmasters•exactdiagnostic•separateddetectionofconfigurationanddeviceerrors–s。

10、hortcircuit,overload,missingauxiliarypower,communicationerror•detaileddiagnosticsandeasymaintenance•transmissionofanalogvalues•nounreasonabletimedelay•automaticdetectionofanalogparticipants•noneedforconfigurationsoftwareADFaultPowerI-1I-23162兼容性不合理精确诊断辅助配置FieldBusSystems•ASInterfaceFieldBusSystems•Directandeasyconnectionofsensors/actuatorsormodules•Mechanicallycodedflatcable•Twowiresfordataandpower•Insulationpiercingconnectors•simpleconnectingtechnology•safecontacting•protectionuptoclassIP67•Nosk。