900B08-0101  

900B08-0101  

 影響現(xiàn)場(chǎng)輸入給PLC信號(hào)出錯(cuò)的主要原因有： 

1)造成傳輸信號(hào)線短路或斷路（由于機(jī)械拉扯，線路自身老化，特別是鼠害），當(dāng)傳輸信號(hào)線出故障時(shí)，現(xiàn)場(chǎng)信號(hào)無(wú)法傳送給PLC，造成控制出錯(cuò)； 

2)機(jī)械觸點(diǎn)抖動(dòng)，現(xiàn)場(chǎng)觸點(diǎn)雖然只閉合一次，PLC卻認(rèn)為閉合了多次，雖然硬件加了濾波電路，軟件增加微分指令，但由于PLC掃描周期太短，仍可能在計(jì)數(shù)、累加、移位等指令中出錯(cuò)，出現(xiàn)錯(cuò)誤控制結(jié)果； 

3)現(xiàn)場(chǎng)變送器，機(jī)械開關(guān)自身出故障，如觸點(diǎn)接觸不良，變送器反映現(xiàn)場(chǎng)非電量偏差較大或不能正常工作等，這些故障同樣會(huì)使控制系統(tǒng)不能正常工作。 

影響執(zhí)行機(jī)構(gòu)出錯(cuò)的主要原因有： 

1)控制負(fù)載的接觸不能可靠動(dòng)作，PLC發(fā)出了動(dòng)作指令，但執(zhí)行機(jī)構(gòu)并沒(méi)按要求動(dòng)作； 

2)控制變頻器起動(dòng)，由于變頻器自身故障，變頻器所帶電機(jī)并沒(méi)按要求工作； 

3)各種電動(dòng)閥、電磁閥該開的沒(méi)能打開，該關(guān)的沒(méi)能關(guān)到位，由于執(zhí)行機(jī)構(gòu)沒(méi)能按PLC的控制要求動(dòng)作，使系統(tǒng)無(wú)法正常工作，降低了系統(tǒng)可靠性。要提高整個(gè)控制系統(tǒng)的可靠性，必須提高輸入信號(hào)的可靠性和執(zhí)行機(jī)構(gòu)動(dòng)作的準(zhǔn)確性，否則PLC應(yīng)能及時(shí)發(fā)現(xiàn)問(wèn)題，用聲光等報(bào)警辦法提示給操作人員，盡快排除故障，讓系統(tǒng)安全、可靠、正確地工作。


SMC 150PSI PNEUMATIC CYLINDER T-ACNL-80-01-00?10US
 
NUMATICS SOLENOID VALVE I34RD100J053G
 
PARKER 63mm BORE 120.7mm PNEUMATIC CYLINDER 63 CTMPRVS14MC 120.7
 
SMC 145PSI PNEUMATIC CYLINDER T-ACNL-80-01-00
 
NUMATICS 120V, 0.30AMPS, SOLENOID VALVE 554SS43CJ
 
MAC 150PSI 2.5WATTS SOLENOID VALVE PME591AAAA
 
TOYODA MACHINE HYDRAULIC CYLINDER HC-40CB215-W-L
 
SMC PNEUMATIC CYLINDER 63MM BORE 150MM STROKE CKGA163-150Y
 
NUMATICS DOUBLE ENDED PNEUMATIC REGULATOR NIB 123RQ100JP00000
 
NUMATICS 150 PSIG SOLENOID VALVE 134BA400KP14D30
 
NUMATICS SOLENOID REGULATOR VALVE W/ BASE, I35RD115J000000
 
WELKER BEARING COMPANY 250PSIG 63MMBORE 50MMSTROKE PNEUMATIC CYLINDER WCP-027
 
NUMATICS 150PSIG-AIR SOLENOID VALVE I34BB515MP00061
 
PARKER 14N73-32-32 SAE CODE 61 FLANGE HEAD 90 ELBOW
 
NUMATICS 120V, 50-60HZ, 0.16AMPS SOLENIOD VALVE 34DXP4460
 
NUMATICS SERIES ISO5599/11 SOLENOID VALVE I23BB400MP
 
FESTO 145PSI PNEUMATIC CYLINDER DRQD-25-90-PPV-?J-A-AL-ZW
 
SMC CYLINDER CDNAF50N-150H-D?-J59W W/CNA50ND-UA
 
LUBRIQUIP DIVIDER VALVE MSP-151 H006
 
UNKNOWN MANUFACTURER * SCH 40 PIPE NIPPLE * 304/40
 
FESTO 32mm BORE 125mm STROKE PNEUMATIC CYLINDER DNG-32-125-PPV-?A
 
NORGREN 400PSIG INLET 50PSIG OUTLET REGULATOR 11-002-021 103723
 
FESTO 20MM BORE 25MM STROKE PNEUMATIC CYLINDER, DSNU-20-25-PPV-?A, NNB
 
FESTO CONNECTOR CABLE, 159424 PNP, NNB
 
NUMATICS 150 PSIG-AIR PNEUMATIC SOLENOID VALVE, I34BB400KP
 
HYSON 160 MM STROKE, 130 BAR NITROGEN GAS SPRING NP-750-160 SW
 
FIBRO GSA 73169 02310 PNEUMATIC ROBOTIC GRIPPER 52.81.500
 
ST * METRIC 90 ELBOW * UNKNOWN
 
BIMBA DOUBLE WALL ROD END PNEUMATIC CYLINDER CDW-01828-A-18
 
RACINE VARIABLE VOLUME SILENT VANE PUMP PSV DNS0 20HRS 11
 
SMC 145 PSI 1.00 MPA PNEUMATIC CYLINDER, US23700
 
NUMATICS VALVE 225-285B 24VDC 6.3 WATTS
 
NUMATICS 120V 0.30A 60HZ 150 PSIG-AIR PNEUMATIC SOLENOID VALVE, I34SS500K
 
IAI LARGE DIAMETER HOLLOW ROTARY GRIPPER ASSEMBLY
 
NORGREN GRIP-LOK GRIPPER AW 789 PO
 
FESTO LINEAR GUIDE FEN-63-200 NNB

UNKNOWN MANUFACTURER * ASSORTED WEATHERHEAD 90 ELBOW * UNKNOWN
 
NUMATICS REGULATOR VALVE 554RD100J000000
 
FHAC GX11 HYDRAULIC MOTOR/PUMP 9G D23 01
 
PALL MODEL 8670 DUPLEX FILTER ASSEMBLY HH8670D20 UB T 104656
 
NUMATICS 150PSIG, 120V, .16A, 50/60Hz SOLENOID VALVE 554BB500K
 
ADVANCE * CYLINDER REPAIR KIT NIB * I325-00NL
 
NORGREN 250PSI PNEUMATIC LUBRICATOR L17-800-OEDA
 
MAGNETROL PD43L38Y 60W 120V SOLENOID VALVE
 
HYTORK 1125 ACTUATOR W/ ACCUTRAK POSITIONER 1040N 103548
 
PARKER 1000KPA SOLENOID VALVE F72VXBG019A
 
MILLER HEAVY DUTY AIR CYLINDER AV-72BXN -08.00-40.00-01?38-N11-0
 
MAC 24VDC 6.0W 150PSI SOLENOID VALVE 130B-501BA
 
NUMATICS 150PSIG .31A 115V PNEUMATIC SOLENOID VALVE 33SAD441A 103353
 
SMC PNEUMATIC MICRO MIST SEPERATOR REGULATOR AWD20-01B
 
FESTO 50MM BORE 200MM STROKE PNEUMATIC CYLINDER, DNU-50-200-PPV-?A
 
LUBRIQUIP TRABON .150 TWIN OUTLET DIVIDER VALVE, MXP-150T
 
NUMATICS 24 VDC, 4.0 WATTS SOLENOID COIL, 236-312B
 
BEHRINGER CORPORATION BE60P40AH HYDRAULIC FILTER, NIB
 
FESTO 40MM BORE 170MM STROKE PNEUMATIC CYLINDER, ADVU-40-170-PA, NNB
 
PARKER 10671-32-32 FEMALE JIC 37 SWIVEL
 
BIMBA PNEUMATIC CYLINDER 042-DZ YG

VERSA 120V 75PSI SOLENOID VALVE ESM 8012 66 Z CLL36
 
FESTO DGPL-63-500-PPV?-A-GF-B
 
NUMATICS 123BA400K 120 VOLTS 50/60 HERTZ 150 PSIG SINGLE SOLENOID VALVE, NNB
 
ENERPAC AIR HYDRAULIC BOOSTER AHB46
 
NUMATICS 150 PSIG-MAX SOLENOID VALVE ISO5599/11
 
SMC NCDBN32-XA-0065?US AIR CYLINDER, NNB
 
NUMATICS F30B-04CE PNEUMATIC VALVE, NIB
 
FESTO PNEUMATIC LINE GUIDE FEN-50-80-KF NNB

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