8202-HO-IS***8202-HO-IS***日常维护PLC的日常维护和***比较简单，主要是更换丝和锂电池,基本没有其它易损元器件。由于存放用户程序的随机存储器（RAM）、计数器和具有保持功能的辅助继电器等均用锂电池保护，锂电池的寿命大约为5年，当锂电池的电压逐渐降低到一定程度时，PLC基本单元上电池电压跌落到指示灯亮，提示用户注意有锂电池所支持的程序还可保留一周左右，必须更换电池，这是日常维护的主要内容。调换锂电池的步骤为：■在拆装前，应先让PLC通电15秒以上（这样可使作为存储器备用电源的电容器充电，在锂电池断开后，该电容可对PLC做短暂供电，以保护RAM中的信息不丢失）；■断开PLC的交流电源；■打开基本单元的电池盖板；■取下旧电池，装上新电池；■盖上电池盖板。注意更换电池时间要尽量短，一般不允许超过3分钟。如果时间过长，RAM中的程序将消失。此外,应注意更换丝时要采用型号的产品。I/O模块的更换若需替换一个模块，用户应确认被安装的模块是同类型。有些I/O系统允许带电更换模块，而有些则需切断电源。若替换后可解决问题，但在一相对较短时间后又发生故障，那么用户应检查能产生电压的***负载，也许需要从外部其电流尖峰。如果丝在更换后易被烧断，则有可能是模块的输出电流超限，或输出设备被短路。PLC的故障诊断是一个十分重要的问题，是保证PLC控制系统正常、可靠运行的关键。本文对常用的故障诊断方法进行了探讨。在实际工作过程中，应充分考虑到对PLC的各种不利因素，定期进行检查和日常维护，以保证PLC控制系统安全、可靠地运行。TexasInstrumentsPM550-416LoopAccessModuleTEXASINSTRUMENTSPLC530C-1104USPP530C1104BALDORCDPX3426NSFPCDPX3426TEXASINSTRUMENTSPLC2587695-8014USPP25876958014SQUAREDTVS-2EMA12ANSFPTVS2EMA12ATEXASINSTRUMENTSPLC2497447-0001USPP24974470001TexasInstruments500-5032TEXASINSTRUMENTSPLC560-2120WNSFP5602120WPanasonicMHMA102A1GACServoMotorTEXASINSTRUMENTSPLC305-04BUSPP30504BALLENBRADLEY1785-KA5NSFP1785KA5FANUCA80L-0001-0273USPPA80L00010273ASEABROWNBOVERIMFE50034180100​4EHNSPPMFE50034180100​4EHOFFMANC-SD302410SSNSPPCSD302410SSBALDOR35***98R334G1NSFP35***98R334G1TEXASINSTRUMENTSPLC505-7510NSPP5057510TEXASINSTRUMENTS505-CP5434-FMSUSPP505CP5434FMSSST5136-SD-104NSFP5136SD104TexasInstrumentsParallelInputMod7MT-300#11232ALLENBRADLEY8000-LBNSFP8000LBMOTOROLAMVME-147SB-1USPPMVME147SB1MODICONAS-P890-000NSFPASP890000SIEMENS17FSF92BF-1351NSFP17FSF92BF1351HITACHID-64USPPD64ASEABROWNBOVERI1SDA046043R1NSFP1SDA046043R1ALLENBRADLEY2705-EM11J1USPP2705EM11J1TexasInstruments560-2820CPUTI560-2820PerceptronDigitalTricamCameraSensor916-4104TEXASINSTRUMENTSPLC505-5190NSPP5055190GEFANUC44A398714-G01USPP44A398714G01PanasonicACServoDriverMADDT1207052FreeshipBOSCHB830-303074NSPPB830303074PanasonicACServoDriverMSDA043A1AFreeShipPERCEPTRON916-4128DIGITALCONTOURSENSORTRICAMM***A042A1GPanasonicACServoMotorFreeShipASEABROWNBOVERI57310001-CX/5USPP57310001CX5PanasonicACServoDriverMSD013A1XXFFreeShipASEABROWNBOVERIDSQC266AUSPPDSQC266ATEXASINSTRUMENTS500-5848RACKI/O14MODULEBASEASSY.NO.2491573-0001PanasonicACServoDriverMSDA5A1A1ANIBTEXASINSTRUMENTSPLC560-2820NSFP5602820PanasonicACServoDriverMADDT1205003NIBFreeShipASEABROWNBOVERI(ABB)DSDP1606TexasInstrumentsI/OModules,DifferentTypes!ALLENBRADLEY284D-FHD6P0D-2​5-CR-3-DB1-SB-​OCNSFP284DFHD6P0D25C​RA560-2820TITexasInstrumentsPowerSupply5602820Panasonic-MinasACServoDriverMSD023A1XTELEMECANIQUETSX-RAM-32-16NSFPTSXRAM3216TEXASINSTRUMENTSPLC505-4432USPP5054432ASEABROWNBOVERI58097691NSFP58097691FANUCA02B-0211-***1USPPA02B0211***1FANUCA20B-0010-0130USPPA20B00100130LIMITRONKTU-3000NSFPKTU3000CONTROLTECHNIQUESDXE-430USPPDXE430TEXASINSTRUMENTSPLC530C-6202USPP530C6202XYCOM3406-000001000​0000NSFP34060000010000​00TEXASINSTRUMENTSPLC500-2101NSFP5002101CUTLERHAMMER42-10215-03USPP421021503GENERALELECTRIC9L10MAL334USPP9L10MAL334ASEABROWNBOVERIG05400A00USPPG05400A00SIEMENS6AU1-121-3CA00​-1AA0NSFP6AU11213CA001A​A0TexasInstruments500SeriesPLCPart#520C-1102TexasInstrumentPM550-116TexasInstrumentsRTU-T058-TTERMINATIONPANELRTUT058TPANASONICACSERVOMOTORMUMS041A1F0SSSECSERVOCONTROLLERFUJIELECTRICEP3959EC1FNFPEP3959EC1ASEABROWNBOVERISDTR16DBUSPPSDTR16DBPanasonicM***102H1CACSERVOMOTORPACIFICSCIENTIFICR43HEAA-R2-NS-​VS-02NSPPR43HEAAR2NSVS0​2TEXASINSTRUMENTSPLC128-1114NSFP1281114ASEABROWNBOVERIYB560103-CD/24USPPYB560103CD24OnePanasonicACServoDriverDV85018HA502)