15736-69***15736-69***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。FOXBORO2AX-MULUSPP2AXMULCUTLERHAMMER2D82302G01USPP2D82302G01TexasInstrument500-5019WordOutputModuleTAGSYSRFIDL-100USPPL100TEXASINSTRUMENTSPLC505-6208AUSPP5056208ATexasInstruments555-1101ASEABROWNBOVERIAF460W-30-11-7​0NSFPAF460W301170FUJITSUCOMPUTERPRODOFAMERIH16-1801-H080USPPH161801H080EMERSONT-60USPPT60SAJF//PANASONICADKF5085AAACSERVODRIVERUNITUSEDASEABROWNBOVERI57360001-KGUSPP57360001KGPanasonicACServoDriverMSDA083A1A/750WTEXASINSTRUMENTSPLC505-7012USPP5057012TEXASINSTRUMENTSPLC500-5026NSFP5005026NATIONALINSTRUMENTNI-CFP-2020NSFPNICFP2020GENERALELECTRIC7VSDD08CD01USPP7VSDD08CD01ELECTROCRAFT9101-1133USPP91011133TEXASINSTRUMENTSPLC425-CPUNSPP425CPUWESTINGHOUSE4256A25G01USPP4256A25G01TexasInstruments500SeriesPLCPart#520C-1102ASEABROWNBOVERIACS501-010-4-0​0P2USPPACS501010400P2LEEDS&NORTHRUP074419NSPP074419ALLENBRADLEY1785-CHBMNSPP1785CHBMASEABROWNBOVERINDCU-21CUSPPNDCU21CTEXASINSTRUMENTS520-1101USPP5201101TEXASINSTRUMENTSPLC505-7003USPP5057003ASEABROWNBOVERIYT212003-UBUSPPYT212003UBTEXASINSTRUMENTSPLC500-5016USPP5005016MODICON110-CPU-612-00NSFP110CPU61200(AB01)ACSERVODRIVERZ축DIRVERPANASONICMSDA041A1A07ASEABROWNBOVERIACH501-010-4-0​0P2USPPACH501010400P2TexasInstruments505-4908ASEABROWNBOVERIRTO08358USPPRTO08358TexasInstruments5TI-1034-2ASEABROWNBOVERI57275758NSFP57275758ELECTROCRAFTDM-30USPPDM30SIEMENS6ES5-943-7UA11USPP6ES59437UA11PanasonicACServoMDDDT55401.5KWDriverTEXASINSTRUMENTSPLCPM550-110USPPPM550110TEXASINSTRUMENTSPLC555-1101NSPP5551101ASEABROWNBOVERIYT204001-JNUSPPYT204001JNTEXASINSTRUMENTSPLC505-2510USPP5052510TEXASINSTRUMENTSSIEMENSTEXASINSTRUMENTS500-5011OUTPUTMODULELOT5005011LEYBOLDCM31USPPCM31TITEXASINSTRUMENTS530-1104CONTROLLERPLCMODULEMatsushitaPanasonicMSD023A2XXVACServoDriverGEFANUCIC3600AOAL1D1USPPIC3600AOAL1D1TEXASINSTRUMENTSPLC430-CPUNSPP430CPUCUTLERHAMMER42-10215-03USPP421021503OLECLT1USPPLT1PanasonicServoDriverMBDDT2210NIBFreeShip***ARTEKT-BOXUSPPTBOXPanasonicACServoMotorMUMS012C2V1SFreeShipALLENBRADLEY1326-CPB1-060NSPP1326CPB1060RCIRC2KCNASAUSPPRC2KCNASAINDRAMATMAC090B-0-PD-1​-B/110-A-0/I01​000USPPMAC090B0PD1B11​0CPERCEPTRON515-0108DIGITALSPOTLIGHTW/MOUNTTEXASINSTRUMENTSPLCPM550-110USPPPM550110ASEABROWNBOVERIOETL-NF600A-2S​WNSFPOETLNF600A2SWPanasonicACServoDriveMQDB011AAD03new0190-19214ASEABROWNBOVERIFDC86-UNIT1BNSFPFDC86UNIT1BASEABROWNBOVERI3HAB2220-1USPP3HAB22201ExpeditedshippingailableTEXASINSTRUMENTS14MODULEI/OBASEMODEL500-5848PERCEPTRON923-0010TRILIGHTTEXASINSTRUMENTSPLC305-01ABNSFP30501ABWESTINGHOUSE15RBA4-PNMUSPP15RBA4PNMSIEMENS6FX1-120-2CA00USPP6FX11202CA00OMRONCV500-PS211FNFPCV500PS211ASEABROWNBOVERIYPQ-101EUSPPYPQ101ECKDCORPPVU-OP-1NSPPPVUOP1)