大量的工程實(shí)踐表明，PLC外部輸入、輸出設(shè)備的故障率遠(yuǎn)遠(yuǎn)高于PLC本身的故障率，而這些設(shè)備出現(xiàn)故障后，PLC一般不能覺察出來，可能使故障擴(kuò)大，直至強(qiáng)電保護(hù)裝置動(dòng)作后才停機(jī)，有時(shí)甚至?xí)斐稍O(shè)備和人身事故。停機(jī)后，查找故障也要花費(fèi)很多時(shí)間。為了及時(shí)發(fā)現(xiàn)故障，在沒有釀成事故之前使PLC自動(dòng)停機(jī)和報(bào)警，也為了方便查找故障，提高維修效率，可用PLC程序?qū)崿F(xiàn)故障的自診斷和自處理。


現(xiàn)代的PLC擁有大量的軟件資源，如FX2N系列PLC有幾千點(diǎn)輔助繼電器、幾百點(diǎn)定時(shí)器和計(jì)數(shù)器，有相當(dāng)大的裕量，可以把這些資源利用起來，用于故障檢測(cè)。


聯(lián)系人：黃曉飛(銷售工程師) 
移動(dòng)電話:18030263579 
固話:0592-6895320 
QQ：2472574325


全球瘋狂低價(jià)甩賣


  
 NEWGREATLAKESBELTINGQPH110WFBBFRICTIONBRUSHBELT


NIBALLENBRADLEY700-HHF62Z12FLANGEMOUNTPOWERRELAY
IC693MDL734LT配件

IC693MDL734LT配件

IC693MDL734LT配件

1991GEOPRIZMELECTRICALDIAGNOSISSERVICEMANUAL 


ALLENBRADLEY700DC-F400CONTACTOR


1998P12CHASSISMOTORHOMESERVICEMANUALVOL1-3


1999GEOMETROM-PLATFORMSERVICEMANAULLOTOF2


NIBNORTON1601BFHTRISTYLEDOORCLOSER696


TROEMNER8416TCALIBRATIONWEIGHTSSELECTRONICBALANCE


NIBTRICO30052OPTO-MATICOILERPNEUMATICS


NIBSQUAREDQOUR220CIRCUITBREAKER20AMP2POLE*


SICKLUT1-440OPTICELECTRONICLUMINSENSORWITHLENS


1994CHEVYLUMINASILHOUETTETRANSSPORTSERVICEMAN-2


CONTINENTALSAFETYEQUIPCALIBRATIONKIT


NIBHORTONNEXEN940001PRESSUREREGULATOR 


NEWASCOREDHAT8223A21SOLENOIDVALVE1/42NC*


NIBSIEMENS5SX2220-5CIRCUITBREAKER2POLE20AMP*


NIBSIEMENS5SX2225-5CIRCUITBREAKER2POLE25A 


CONTINENTALSAFETYEQUIPCALIBRATIONKIT


CONTINENTALSAFETYEQUIPCALIBRATIONKIT


CONTINENTALSAFETYEQUIPCALIBRATIONKIT


NIBROPLAN110-50MOG3000RETAINER


NIBROPLAN110-11MOG3000STAT.SIC


NEWPANDUITPLT8EH-Q0CABLETIESWEATHERRESISTANT25


NIBFURNAS69GA6PRESSURESWITCH2POLE


NIBTELEMECANIQUEXSDA600519H7INDUCTPROXIMITYSWITCH


NIBVICTORMEDALISTTPR250-125-580-0781-9133REGULATOR


NIBALLENBRADLEY700-HG47A4CONTROLRELAY 


NIBARROWF329-08LPPARTICULATEFILTER300SCFM


NIBPREST0-O-LITEESABR-36-400-580INERTREGULATOR 


NEWGOULDITEG203FRENEWALCONTACTSKITSIZE43POLES


NIBSIEMENS5SJ4306-8HG41CIRCUITBREAKER6AMP3POLE


NEWGOULDITEG203GRENEWALCONTACTSKITSIZE5 


NIPSIEMENS8US1923-2AA01BUSBARHOLDER600MMEXFIX*


NEWSIEMENS51PC5G3LBPILOTLIGHTTRANSFORMER120VOLTS


NEWBRYANTBRDBR20-302POLETANDEMCIRCUITBEAKER 


ZINSCOCN-54MAGNETRIPCIRCUITBREAKER1POLE20AMP


NEWGE24PSBMINIATUREINCANDESCENTLIGHTBULB2W24V


1999CHEVYEXPRESSGMCSAVANASERVICEMANUALLOTVOL1-3


NEWGEPR2SINGLECONTACTLIGHTBULB1WATT2.38V*


NEWTHOMASBETTSMOUNTINGBASEPANELMOUNT 


NIBSIEMENSMMSKF3MANUALSWITCH2POLETOGGLE*