RAPI-01C咨询***：18506919598一．可靠性高、抗干扰能力强据有关资料称：“到目前为止没有任何一种工业控制设备可达到PLC的可靠性”。控制系统在使用时发生故障，绝大多数是由PLC外的开关、传感器、执行器引起的，而不是PLC本身。若是PLC，多数是使用、设计不当引起的。诱发电子设备故障的原因大概有如下几种：针对以上故障原因，PLC在硬、软件两方面采取了相应的解决方法，使其可靠性大为提高，PLC本身发生故障的概率***。硬件(1)常规手段选用优质元器件，设计合理的系统结构，实施加固使其易于抗冲击，印制板的设计加工和焊接工艺严格规范。(2)隔离所有I/O电路一律采用光电器件进行隔离，使内外无电气回路的联接点(电浮空)，这样可以抗电干扰。(3)滤波对供电系统及输入回路采用模拟量滤波(如LC、π型滤波网络)，再加上数字滤波，以消除或***高频干扰。(4)屏蔽采用导电、导磁性能良好的材料进行屏蔽，以防电磁波辐射的干扰。(5)增强电源的适应性PLC的供电系统(内部为DC)采用开关电源，并用集成电压调整器进行调整，使之适应电网电压较宽范围的波动。(6)采用模块式结构一旦某模块有故障，能迅速更换，使系统停用时间减到***低程度。2.软件（1）设置警戒时钟WDT(看门狗)PLC在正常的运行程序中对WDT定时复位，若超过了WDT规定的时间，WDT会发出报警信号，并强制系统CPU复位，使之走入正常的运行程序。（2）系统软件对用户软件自动进行检查能对用户程序进行查错、报错，使用户程序无语法、结构性错误，错误的程序或参数得不到运行。（3）掉电保护对RAM区用后备电池或蓄能电容，掉电时使RAM继续有电，保证用户程序运行的状态信息和中间数据不会丢失。（4）自检系统程序中有对CPU及外围器件自动检测的功能，一旦出错，立即报警。NemicLAMBDAPS-14-24POWERSUPPLY24V10A294wCoselUAF500S-2424V22APowerSupplyLambdaJWS100-12/APowerSupply100-240VACLambdaOmegaMML600E60744600WPowerSupply100-230VANemicLambdaEWS1500-5EWS15005PowerSupply2055WLEVMeanWellS-350-12-5DCPowerSupplyVicorMM4-15508-1MiniMegaPACPowerSupply1140-01301QualidyneQML300W5V12VPowerSupply097500-01MWMeanWellSP-500-48PowerSupply48V10A480WActiveHP8484APowerSensor0.3nW~10uWDIGITALZYTECDEC30-40382-02BA353EP071230POWERSUPADVICEELECTRONICSAR4830POWERSUPPLY230VAC48VDCLAMBDAAlpha1000WPOWERSUPPLY94.4-240vacor133-328vPowerTechFSP090-50PL90WSWITCHINGPOWERSUPPLYLOTOF2MerrimacPDM-24M-13GPOWERSUPPLYPOWER-ONED.C.80WMAP80-4001POWERSUPPLYEMACSP1G-6250P250WPowerSupplyNEMICLAMBDAEWS300-18CEWS300-18POWERSUPPLY18V-18AHITRONHSH300-13POWERSUPPLY300WRADDXC8R-DCREV1.1VDC-INDPSPowerSupplyPSUAF-3204-10-0032-48VDC2APOWERSUPPLYMODULECPSHVPOWERSUPPLY130NF/1314115VACOPTI-1314ZYTEC22930000950WPOWERSUPPLYPAYTONTR-1466-LREV3.0230VCoselPAA150F-5PAA150F-5-NPowerSupply5V30AAcopianVB24G350M-230RegulatedPowerSupplyARTESYNNFC25-24T05-12ASPS48VREV1.0LOTOF2NEMICLAMBDANES240-24100-240v3.9a24v-10aJASPERELECTRONICSAPP0749PCI204-1022-4-S?NG-B02101-20RADACE3400/DC48VDCPowerSupplyEDWA***ELECTRICSMODULEPowerSupplyD372070003P50AMeanWellS-300-48TPowerSupply48.5V5.5AAC220VMWMeanWellSP-200-48POWERSUPPLYMWMeanWellQ-250CPowerSupplyCISCOARTESYN12008DC-DCMFR-DC34-0821-0222945900COSELP1500E-2424V65A7282576YPOWERSUPPLYRADPS50AC-D100-240VACPowerSupplyRADOP34-PSAREV0.148/60VDC100-240VACPowerSupplyRADLRS1S-PS25-AC48/60VDC100-240VACPowerSupplyCompactPCIJASPERELECTRONICSPCI174-1022-47-?A02101-00TRI-MAGMFSP-033INPUT:120/240VACOUTPUT+5V/6ADCPOLOTOF2CherokeeInternationalSP519-3A721-000072-201MWMeanWellQ-250FPowerSupplyAcopianVB24G210M-230RegulatedPowerSupply10/6A240NEMICLAMBDAPS1048/BPOWERSUPPLY100-240VEDWA***ELECTRICSMODULEPowerSupplyD372070003P50ADCBRUSHLESSEFB1212LVHEFUN"6.5ARTESYNEP071359-1C-40V~-75V15A330WPOWERSUPPLYAMAT/SpellmanESC1.5PN:X27840190-07247PWRSPDC1ARTESYN22944300POWERSUPPLYPMD-1004589-5640POWERSUPPLYRADEXT-CYC3-PS-DCREV1.148VPowerSupplyALVARIONACPOWERADAPTORPS1096WMB480050-1GAC/DC48VGAMATRONICHPSV48VDC6APowerSupplyModuleCISCOCNP3GKKBAA341-0054-0112410POWERSUPPLY60A240)