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詳細(xì)內(nèi)容: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)裝置動作后才停機(jī),有時甚至?xí)斐稍O(shè)備和人身事故。停機(jī)后,查找故障也要花費(fèi)很多時間。為了及時發(fā)現(xiàn)故障,在沒有釀成事故之前使PLC自動停機(jī)和報警,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)定時器和計數(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。 聯(lián)系人:黃曉飛(銷售工程師) 移動電話:18030263579 固話:0592-6895320 QQ:2472574325 全球瘋狂低價甩賣 NEW GREAT LAKES BELTING QPH110WFBB FRICTION BRUSH BELT NIB ALLEN BRADLEY 700-HHF62Z12 FLANGE MOUNT POWER RELAY 1991 GEO PRIZM ELECTRICAL DIAGNOSIS SERVICE MANUAL ALLEN BRADLEY 700DC-F400 CONTACTOR 1998 P12 CHASSIS MOTORHOME SERVICE MANUAL VOL 1-3 1999 GEO METRO M-PLATFORM SERVICE MANAUL LOT OF 2 NIB NORTON 1601BFH TRI STYLE DOOR CLOSER 696 TROEMNER 8416T CALIBRATION WEIGHT SS ELECTRONIC BALANCE NIB TRICO 30052 OPTO-MATIC OILER PNEUMATICS NIB SQUARE D QOUR220 CIRCUIT BREAKER 20 AMP 2 POLE* SICK LUT1-440 OPTIC ELECTRONIC LUMIN SENSOR WITH LENS 1994 CHEVY LUMINA SILHOUETTE TRANS SPORT SERVICE MAN -2 CONTINENTAL SAFETY EQUIP CALIBRATION KIT NIB HORTON NEXEN 940001 PRESSURE REGULATOR NEW ASCO RED HAT 8223A21 SOLENOID VALVE 1/4 2NC* NIB SIEMENS 5SX2 220-5 CIRCUIT BREAKER 2 POLE 20 AMP* NIB SIEMENS 5SX2 225-5 CIRCUIT BREAKER 2 POLE 25A CONTINENTAL SAFETY EQUIP CALIBRATION KIT CONTINENTAL SAFETY EQUIP CALIBRATION KIT CONTINENTAL SAFETY EQUIP CALIBRATION KIT NIB ROPLAN 110-50 MOG 3000 RETAINER NIB ROPLAN 110-11 MOG 3000 STAT.SIC NEW PANDUIT PLT8EH-Q0 CABLE TIES WEATHER RESISTANT 25 NIB FURNAS 69GA6 PRESSURE SWITCH 2 POLE NIB TELEMECANIQUE XSD A600519H7 INDUCT PROXIMITY SWITCH D0140JF-R配件 D0140JF-R配件 D0140JF-R配件 NIB VICTOR MEDALIST TPR250-125-580-0781-9133 REGULATOR
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