影响现场输入给900H02-0102 信号出错的主要原因有： 

 

1)造成传输信号线短路或断路（由于机械拉扯，线路自身老化，特别是鼠害），当传输信号线出故障时，现场信号无法传送给PLC，造成控制出错； 

 

2)机械触点抖动，现场触点虽然只闭合一次，PLC却认为闭合了多次，虽然硬件加了滤波电路，软件增加微分指令，但由于PLC扫描周期太短，仍可能在计数、累加、移位等指令中出错，出现错误控制结果； 

 

3)现场变送器，机械开关自身出故障，如触点接触不良，变送器反映现场非电量偏差较大或不能正常工作等，这些故障同样会使控制系统不能正常工作。 

 

影响执行机构出错的主要原因有： 

 

1)控制负载的接触不能可靠动作，PLC发出了动作指令，但执行机构并没按要求动作； 

 

2)控制变频器起动，由于变频器自身故障，变频器所带电机并没按要求工作； 

 

3)各种电动阀、电磁阀该开的没能打开，该关的没能关到位，由于执行机构没能按PLC的控制要求动作，使系统无法正常工作，降低了系统可靠性。要提高整个控制系统的可靠性，必须提高输入信号的可靠性和执行机构动作的准确性，否则PLC应能及时发现问题，用声光等报警办法提示给操作人员，尽快排除故障，让系统安全、可靠、正确地工作。

 

 

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