1794-OV161794-OV161794-OV16公共处理工作有：循环时间监控、外设服务及通讯处理等。监控循环时间的目的是避免"死循环"，避免程序不能反复不断地重复执行。办法是用"看门狗"（Watchingdog）。只要循环超时，它可报警，或作相应处理.外设服务是让PLC可接受编程器对它的操作，或通过接口向输出设备如打印机输出数据.通讯处理是实现PLC与PLC，或PLC与计算机，或PLC与其它工业控制装置或智能部件间信息交换的。这也是增强PLC控制能力的需要。也就是说，实际的PLC工作过程总是：公共处理--I/O刷新--运行用户程序--再公共处理--……反复不停地重复着。1.3可编程控制器实现控制的方式用这种不断地重复运行程序实现控制称扫描方式。是用计算机进行实时控制的一种方式。此外，计算机用于控制还有中断方式。在中断方式下，需处理的控制先申请中断，被响应后正运行的程序停止运行，转而去处理中断工作（运行有关中断服务程序）。待处理完中断，又返回运行原来程序。哪个控制需要处理，哪个就去申请中断。哪个不需处理，将不被理睬。显然，中断方式与扫描方式是不同的。在中断方式下，计算机能得到充分利用，紧急的任务也能得到及时处理。但是，如果同时来了几个都要处理的任务该怎么办呢？优先级高的还好办，低的呢？可能会出现照顾不到之处。所以，中断方式不大适合于工作现场的日常使用。备货，备货，降降降，火火火，火火火……————————————————————————————————公司名称：厦门泰尼电气有限公司联系人：小黄（销售代表）联系电话：0592-6809319传真号码：0592-6890859（麻烦备注01006收）手机：18950191386***号码:2917675397邮箱：2917675397@***.com诚信经营，质量为首，诚信至上，泰尼电气小黄竭诚为您服务！！！————————————————————————————————PhilipsPowerSupply12V9A941501243001PE1243/00BogenPAMicrophoneAmplifierEqualizerCTS1060AscoRed-HatIISolenoidValve40PSI1/2"SC8210G87AstecSunPowerSupply320WAA22760OlympusPCBBoardSU4839UPIVFXCP00REPAIRDataZoneDataDrive30GBDataBook75023-001***ayaLucentAT&TDS1InterfaceTN767BV3ChillerCable50Feet0375362210375-362-2​1NEWAdobeAcrobat7.0ProProfession​alOEMVersionWindowsParkerCompumotorZetaS57-83-MO-​SNEWBelkinOmni-ViewPro8-PortKVMF1D108-OSDGilbarcoTwoWireStripI/OBoardPCITWIT20178-G1***ayaDefinityTelecomDigitalLineCardTN754EmulexFibreChannelAdapter2GB/SFTRJ-8519LP9002L-E***ayaLucentAT&TAnalogTrunk&LineTN797V4***ayaLucentAT&TDefinityDigitalLineTN754V13KeyenceSensorControlUnitCU-21TADell4300Motherboar​d0008891P-1​2951-94N-0​222PhilipsPowerSupply5V20A941501240001PE1240/00Intelligen​tDigitalSystemsDigitalI/OCardIDSDIO***ayaAT&TDefinityTelecomDS1InterfaceTN767BV9SunPowerSupply195W300-1400-0​1PEX705-40RadyneDMD2050ArtesynPowerSupplyNLP65-7608​GJ3601SinclairRadioLabsHH4140806-960MHzKyosaiPowerBoardAWJ-6C172STektronixPhaserShareEthernetCard10BASEMIL-3600TE​KAppleMacnVidiageForce4GForceAGPVideoCardA84OlympusEtmoidesSurgicalScissor45DegreeA7872NetgearProSafe***Firewall10/100FVS318OlympusVideoimage​scopeControlUnitIV-5AREPAIRBergLinearMotorAdjustableBearingLMA-6-FNEWK&LMicrow***eZC158-36FV50-1544​/H33-0/050140ApplePowerMacG5EmptyCase620-2700A1047MetasoundWebcasterAudioAnnouncerMS-8000HoneywellMicroSwitchPhotoelect​ricSensorMHP-TLR31QK&LMicrow***eA123977FV-1125/6​0-0/0PDynaparFaberEncoderPF-1222H232000110​11JHP1GBFibreChannelHBACardA5158AA5158-6000​1NardaRFCoaxialSwitchDC-18.0GHz28VDCSEM163NEW***ayaDefinityTelecomToneDetectorCardTN748CV5Lucent15AAnnounceme​ntSystem***ayaDefinityTelecomDS1TieTrunkCardTN722BV10Panasonic103"TH-103PF10TVPowerMenuVolumePanelHoneywellMicroSwitchPhotoelect​ricSensorMHP-TLE30QDellExternal35/70GBDLTTapeDrive30-60066-0​1OrientalMotorTorqueMotor&GearHead4TK10CGN-APrecisionSensorsVacuumSwitchPV48W-68NEW***VideoDiscLaserDiscPlayerLDP-1450REPAIRK&LMicrow***eA23596T7FV-1130/​X40-0/0PMDCStraightTubeNW63NW40840000L250XK150NEWSunSBUSDifferenti​alSCSIControllerAdapter3701704Intelligen​tDigitalSystemsIDS4-ChannelTVCardL4DynatechDataSystemsMountingFrameRA-20&VFP-2TJ***ayaLucentAT&TTieTrunkTN760DV12***ayaLucentAT&TTieTrunkTN760DV13EpsonPOSTransactio​nReceiptPrinterTM-U200AM119ACMSQuality40MBTapeDriveRetriever/​40A5X70DataProductsCircuitBoardRegulatorAssy261564-001BytekUltr***iole​tUVMultipromEraserBUV-3ACompaq***artArray4200SCSIRaidController007902-001NovaMicrow***eL3RFIsolator***A1950IES-00​1NEWDataVisionLCDPanelADV-20400S2-FBLYNEWTelemecani​queSquareDStarterLD1LB030LB1LB03P21+VertexRSIRFW***eguideFilter112923-1NEWSiemensCircuitBreakerMotorProtector3RV1021-1J​A10ReutersAmuletKeyPadExtenderakP-tCA-AKPT-00​01MurrSwitchModePowerSupply24VDC10A85086***ayaLucentAT&TDIDTrunkTN753BV10107985616CirrusLogicVideoCardCL-GD5440-​J-QC-BJ6NGD543XP​CIHaydonSwitch&InstrumentMotor5V87H4B-05-0​06ENGKeymedPowerSupplyPCBBoard7288000AActel7249497SatelliteTran***issi​onSTSIFD/CMODASSYC69140-1SiemensSimaticS5InterfaceMod.6ES5315-8MA11REPAIRDigitalDEC100WPowerSupply30-48258-0​1TESTEDNiceSystemsTimeCodeDistributi​onPanel506A0005-0​5IBMeServerxSeries345SystemBoard23K4455RobotMultivisio​nPlus***ProcessorMV16i***ayaLucentAT&TToneDetectorTN748DV7IBMSeagateDATTapeDriveSCSI59H268259H3536CTD8000CompaqSystemBoard&PentiumII166813-001SL2U6VertexRSIRFW***eguideFilter112923-2NEWIBMeServerxSeries330867411X1133MHz512MBRAMTellabsDCPowerSupply2A48VPWPQH151AB8021818021TXOlympusDSSDigitalVoiceRecorderUSBAdapterRA5***ayaLucentAT&TDigitalLineTN2181V5NiceSystemsBAUDADBBoard503A0638-1​GNEWHoneywellAnalogTachometerMotor&Encoder2VM62-020-​5Epitaxy5TIHeartbeatHeartBeat01-000-0D-​560EpitaxyEquip5TIHeartbeatHeartBeat01-000-0D-​560***ayaLucentAT&TDigitalLineTN754CV4107849259HuntingtonCoaxialForelineTrapNW40CT-150-SFHPSStainlessLongWeldStubFlangeNW63100760406NEWMilgoSoluti***Cable5956-879R-​15DIIE1031780009-100***ayaLucentAT&TDigitalLineTN754CV3107849259ZenithPla***aTVTiltableWallMountPWMT-200NEW***ayaLucentAT&TDS1InterfaceTN767EV18CitizenPOSTransactio​nRollReceiptPrinteriDP3535***ayaLucentAT&TDigitalLineTN2181V8KeymedPCBBoardOFPControl7501252K10001188REPAIROxfordA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