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维修PLC先后顺序是怎样的？
先动口再动手
1）维修PLC时，不要立即直接动手，而是先询问故障发生前后的情况、故障现象。
2）如果对生疏的PLC维修，应先了解其工作原理。
先清洁再维修
维修PLC时，可以打开机子，首先进行清洁PLC。
先外后内
维修PLC时，先检查外部现象与原因，如果外部正常，则然后检查PLC内部。
先无电判断后通电判断
首先在没有通电的情况下，先判断熔丝是否损坏、是否不通电就可以判断出故障点。如果不能够判断出来，则再通电检查PLC。
GracePort Interface P-R2-F3R0-C10 120 VAC, 5A
GracePort Interface P-R33-H3R3 w/ Harting 933024616 Housing
Graham Transmissions 176B1118 Motor Control Board w/MW22B-10 Potentiometer
Graham Transmissions S1000 176B1111 Motor Speed Control, 120VAC, 90VDC
GrayHill 70MRCK16 Input, Output Module Rack w/M-ODC5 Modules 2.5 -VDC 3 A
Grayhill 70MRCQ24 401 Rack Module Board
Grayhill 84LS-AB2-112-N Keypad 3"Long x 2.5"Wide 12 Button waterproof Silicone
Great Western Manufacturing 6 670 53 30GG Separator/Sifting Screens
GRI 16200-136 Mini Bellows Pump /Rex Pump, Pump 24VDC 1/1.5/2" Bellow
Groschopp & Co. 4060 Viersen1 KM 94-60 Electric Motor
Groschopp & Co. 779361 4060 Viersen 1264204 Conveyor Motor 110V 1.8A 160W
Groschopp 1665801 Servo Motor 7067875
Groschopp 1665801 Servo Motor 7068228
Groschopp 1665801 Servo Motor 8114726
Groschopp 6473617 Motor, 220V, 14A, 25W
Groschopp DM265-20 Gearmotor 3PH 220V 0.14A 25W 4800n
Groschopp Gearmotor WK1695401 Nr.8248020
Groschopp Motor 4882356 115V 2.1A 60HZ 1600RPM SEW EuroDrive Reducer .16HP
Groschopp Nr. 7067400 WK. 1665801 Servo Motor
Groschopp Nr. 7328876 WK. 1665801 Servo Motor
Grossenbacher Operator Touchscreen Interface 50-81-232 Series: S 24VDC 15W
Grove Gear :1 ratio gear box
Grove Gear 20ZF-2 Gear Box .491Hp 50:1 Ratio
GROVE GEAR BMQ218-1 GEAR REDUCER Input HP: .317 Motor Frame: 56C Ratio: 60:1
Grove Gear Flexaline BMQ1206-3 30:1
Grove Gear Flexaline FHM226-2 50:1 gear box 1.07Hp 140TC Frame
Grove Gear Flexaline Gear Reducer B128-2 Ratio 10:1, Input HP 1.36
Grove Gear Flexaline H242-1 20:1 Ratio 7.533Hp 1750Rpm
Grove Gear Flexaline Speed Reducer FHMQ230-1 Ratio:15 Motor Frame 180TC 4.20HP
Grove Gear Iron Man 17MF-2 .814HP Ratio:20 1750RPM
Grove Gear Iron Man GR8240575.20 10:1 Ratio 3.564Hp
Grove Gear Iron Man NH-BLMQ818-25-L-56(SP) Ratio:25:1 .884HP Torque Out:644
Grove Gear Iron Man Reducer GR-TMQ824-30-R-56 Ratio:30 1.653HP Torque Out:1423
Grove Gear Iron Man Speed Reducer NH-FHMQ818-20-HR-56-14 1.046HP Ratio:20
Grove Gear IronMan GR-BMQ830-40-L-140 Ratio: 40 Input 2.251 Out Torq: 2.477
Grove Gear Multiplier TXQ3210/180 12.9HP Ratio:3 1750Rpm Approx 1" Shaft Dia
Grove Gear Reducer TMQ232-2 Ratio:30 3HP FR.140TC 1750RPM Approx 1.5" Shaft Dia
Grove Gear Speed Reducer 10:1 Ratio HMQ224-1 3.083Hp 1750Rpm 140TC Frame
Grove Gear Speed Reducer HMQ226-1 Ratio:10:1 3.90HP FR.56C 1750RPM 1" Shaft Dia
Grove Gear TM230-2 Flexline 10:1 Gearbox, Frame: 21TC, Shaft: 1-1/4"
Grove Gearbox HMQ1238-1 Flexaline 10:1 Ratio, Frame 140TC
Guardmaster Trojan 5 AC-15 Safety Switch
GW Eagle Signal 17P4C-A120 Relay, 20076, 120VAC, *Lot of 12
H Based Mounting Stand for labeling Unit, Movable with SMC Assembly
HA HA-05 SK Circuit Board 08375
Habasit 0326108 Rubber Belting, 8" x 10'
Habasit 821-K750 Plastic Table Top Conveyor Chain Length: 9'11 Width: 8"
Habasit 879T15325NO Slat Top Conveyor Chain, 3.25"W x 10 Ft Long
Habasit CO879K0325LFTA Slat Top Conveyor Chain 879TPOML325 W: 3.25"W x L: 10Ft
Habasit SAQ-8E Conveyor Belt, 12" x 25'
Habasit Tabletop Chain Conveyor 879T POM L 325 10' Long 3.25" Wide
Hachi 6120800 Inductive Conductivity Digital Gateway
Hachi 6120800 Inductive Conductivity Digital Gateway Kit
Haitima 316 Stainless Steel Ball Valve 4" 4-CF8M, 1000 WOG F10/F12/S22
Haitima Actuator W/ Ball Valve HTS-092-12/17-F05/F07 8 Bar
Haitima Actuator W/3" Ball Valve HTS-092-12/17(0.67)-F07/F05 116PSI
Haitima C.F.F. SS-15 316 Stainless Steel Ball Valve 4" 4-CF8M
Haitima C.F.F. SS-2B CF8M 1500WOG 1-1/2"
Haitima Valve HTS-092-12, 116psi Max, Spring Return
Haitima Valve HTS-092-12/17-F05/F07, 8 Bar Max
Hamilton 5in dia wheel Swivel and Rigid Casters 1000lbs capacity
Hammond Manufacturing PT100MQMJ Control Transformer
Hammond Manufacturing PTD500MQMJ Industrial Control Transformer
Hammond Power Solutions Transformer Q003LECF 240/480V 3KVA 60HZ Single Phase
Han Young DX9-JMWNR Temperature Controller, 264VAC, 12VDC, 8 Total Digit
Hankison E5-20-05 Oil Removal Filter
Hanna Pneumatic Cylinder MP13LNC3.25 26.00 FSM1G
Hardy WaverSaver C2 IT HI 2151/30WC 120VAC 47-63HZ .17A 10W
Harting 16 Pin Industrial Connector Cable P/S 3 HAN 16 HVE-M, 600V, 16AMP
Harting Han 16 Hv E-F Female, M 600V with Kopex Liquid-Tight Conduit
Haug ALS 012 100 Radial Axial, Part Number: 118506/49, ID: 08.8730.122
Hawker Siddeley Motor with OHTA-Pump 230/460V 3Ph 1700Rpm 60Hz 6.7/3.35A
HDI ME-30MS4A-M2 Disconnect Switch 30A, 3Ph, 600VAC, 10HP
Heat Exchanger A4033 /GSI Lumonics Coolant Reservoir 0633-582-00 w/ Pump 633-019
Heine EFmB7 Resistor 145 ohm 450 watt
Heinman 6.6-105 Breaker 200AMP, 2 Pole, 120/240VAC, Curve 61
Hercules Foot Switch 531-SWH, 20A, 125-250VAC, 1HP
Herion 0820150 Pressure Switch 250V 6A
Herion 8241002.9169 IMI NORGREN
Hermes Plastic Shear Upper Blade
Hevi-Duty E850 Industrial Control Transformer .850 KVA
Hevi-Duty HS14F1.5BS Transformer 1.5KVA 190/220 x 380/440V 110/220V 50/60HZ 1Ph
Hevi-Duty Industrial Transformer E550
Hevi-Duty P1A150 Transformer Type S1
High Mark 7100 Series Auto ID Controller & High Mark Control Box
High-Mark 8100 Series Auto ID Controller
HILL HOUSE 46405372143-8A Variable speed DC Motor 1/2HP 1725RPM Frame 56C
HI-Lo MCW 600 Fixed Center Distance Drive, Variable Speed Pulley
Hirsch Electronics N060015 Document Camera
Hirschmann Eagle 20 TX/TX Industrial Security Router
Hirschmann RS20 Rail Switch 9,6-60 VDC RS20-0800T1T1SDAEHH07.1.01 Class 2
Hirschmann RS2-16 Ethernet Rail Switch 18-32 VDC, 16 Port
Hirschmann RS2-4TX EEC Rail Switch Class 2 9.6-32VDC 15A
Hirschmann RS2-TX Rail Switch 24VDC FCC Class A
Hirschmann Spider 5TX Rail Switch FCC Class A
Hirschmann Spider 5TX Rail Switch, 9-32VDC, Class 2
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