PLC的故障类型有哪些？

外部设备故障

外部设备就是与PLC实际过程直接联系的各种开关、传感器、执行机构、负载等。这些设备发生故障，会直接影响PLC系统的控制功能。因此，维修PLC，首先要分清是外部设备故障，还是PLC本身故障。

系统故障

1）系统故障是影响PLC系统运行的全局性故障。

2）PLC系统故障可以分为固定性故障、偶然性故障。

3）故障发生后，可以重新启动使系统恢复正常，则就是偶然性故障。如果重新启动不能恢复，而是需要更换硬件或软件，系统才能够恢复正常，则认为是固定性故障。

硬件故障

PLC硬件故障主要指PLC系统中的模板、电路损坏而造成的故障。

软件故障

PLC软件故障包含软件错误、操作错误等。PLC软件故障一般可以通过PLC本身的自诊断测试功能或者软件来查看、检查。

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Hydel FE57310 Buss Plug 100A 600V 3 Phase

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Hydel FE57310 Buss Plug 3 Pole 600V 100A

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Hydel FE5733 Buss Plug 3 Pole 600V 30A

Hydel FE5733 Disconnect Switch Type FE Flex-A-Plug 3P 600V 30A

Hydraulic VMY3125B5P Servo Motor

Hydrolux K01 78800224 Solenoid 1.35A 24V

Hydroseal 4FXV00F Relief Valve

Hydroseal 4FXV00F Relief Valve

Hypercyl Aries HPS-4-6.00-.75-UH Pneumatic Cylinder

Hytrol 032002 EZ Logic Laser Diffuser Switch

Hytrol 032002 EZ Logic Laser Diffuser Switch

Hytrol 032005 Power Supply

Hytrol 4A-20-1-LH Left Hand Speed Reducer 20:1 Ratio

Hytrol 4A-20-1-RH Right Hand Speed Reducer 20:1 Ratio

Hytrol 4A-40-1-RH Right Hand Gear Reducer 40:1 Ratio

Hytrol 4AC-10-1-LH Left Hand Gear Reducer 10:1 Ratio

Hytrol 4AC-20-1-LH Left Hand Gear Reducer 20:1 Ratio

Hytrol 4AC-20-1-RH Right Hand Gear Reducer 20:1 Ratio

Hytrol 4AC-30-1-LH Left-Hand Gear Reducer 30:1 Ratio

Hytrol 4AC-40-1-LH Left-Hand Gear Reducer 40:1 Ratio

Hytrol 4AC-40-1-RH Right Hand Gear Reducer 40:1 Ratio

Hytrol 4AC-50-1-LH Left Hand Speed Reducer 50:1 Ratio

Hytrol 5AC-10-1-RH Right Hand Gear Reducer 10:1 Ratio

Hytrol 5AC-20-1-RH Right Hand Gear Reducer 20:1 Ratio

Hytrol 5AC-50-1-RH Right Hand Gear Reducer 50:1 Ratio

Hyundai HC20401 LCD Panel

IAI Robo Cylinder RCP2-SA5-I-PM-6-100-P1-M Linear Actuator

IBT Technologies IBT5019Q Panel PC 19 Intel T2050

iClass RWKLB575 618AKT000000 Smart Card LCD Reader/Keypad

ICM Controls LAQS-ICM325HNV Head Pressure Control

iCode Blue ACT500S Intercom Station Surface

ICT PRX-NPROX Nano Proximity Card Reader 125kHz

Idec FC1A-E2A4E PLC Micro-1 Module 24VDC

IDEC MX1A-B 12-R6L Laser Displacement Detection Sensor 30-50mm Range

IE Corp IH740.AB06R23.00889.STTL Incremental Hollow Shaft Encoder 30VDC

IFM 01D103 01DLF6KG Photoelectric Sensor 0.2-10M Range

IFM 02D222 Object Recognition Sensor Broken Screen AS IS

IFM 02D224 Sensor Object Recognition 640x480mm

IFM 02DIRPKG/K Recognition Sensor 8 Pin 24VDC

IFM AC004S OSSD 2R SC4 2-Channel AS-i Safety Monitor

IFM AC004S OSSD-2R-SC4 Two Channel AS-i Safety Monitor

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IFM AC5204 Classic Line AS-i Module 4 In / 3 Out

IFM D-45127 AC003S Safety Monitor OSSD 1R SC4

IFM DY-34A-D100 Rotational Speed Monitor 24VDC

IFM Efector Color Sensor 10-30VDC Numatics OD5007

IFM Efector Flow Controller Switch VS 0200

IFM Efector LK0264A-A00kQPKG/US Level Sensor

IFM EFECTOR PB4210 Pressure Monitor / Sensor

IFM EFECTOR PN3222 Pressure Sensor

IFM Efector Proximity Switch Inductive IG0312

IFM Effector IF3004-BPKG-IF5345 Inductive Proximity Sensor 4mm

IFM Effector IFS208 Inductive Proximity Switch 4mm Range PNP 10-36VDC

IFM Effector IFS208 Inductive Proximity Switch 4mm Range PNP 10-36VDC

IFM IF0302 IFA2004-ABOW Inductive Proximity Switch

IFM IF0303 IFA2002-ABOW Proximity Switch

IFM IN5130 IN-3004-BPKG/6M Inductive Proximity Switch

IFM IN5130 IN-3004-BPKG/6M Inductive Proximity Switch

IFM O2DIRPKG/K Object Recognition Sensor 640 x 480mm Field

IFM PB5224 Pressure Switch Liquid/Gas 1-100PSI

IFS DR1810R3 Contact Receiver

IFS VR4030 Single Mode Fixed Video Receiver

IGAV 8310201-X PLC Controller Board

IGAV 8310201-X PLC Controller Board

IIP Inc MODEL-100-PANEL Control Board Panel Operator Station .2A 115VAC

IIS H10EEG12-FR-W15 Ref# Load Station - Motor Disconnect Cable

IIS H10EEG12-MPS/FPS-50 Cable Dry/Wet 12 AWG

IIS H10EEG12-MR-W03 Ref# Load Station - Motor Disconnect Cable

IIS H18EEG16-FR-W15 Ref# Line Control Panel Cable

IIS H18EEG16-MPS/FPS-B Cable Dry/Wet 16 AWG

IIS H18EEG16-MR-W03 Ref# C08 Cable

IIS H32EEG16-FR-W15 Ref# Urethane Robot Cable

IIS H32EEG16-MPS/FPS-D Cable Dry/Wet 16 AWG

IIS H32EEG16-MR-W03 Ref# C09 Cable

IIS H46EEG16-FR-W15 Ref# Unload Station Run Bar Cable

IIS H46EEG16-MPS/FPS-G Cable Dry/Wet 16 AWG

IIS H46EEG16-MR-W04 Ref# Unload Station Run Bar Cable

IKO LRX15C1T1HS2 Linear Roller Bearing

Iko SBB48-2RS Spherical Plain Bearing NWB

Imaje A13852 Multi-Voltage Industrial Power Board

Imaje A16174B Contact Power Module Board

Imaje A17819 ILC Crayon Large Character Valve Jet Keypad

Imaje A18235 PC Board

Imaje A18629 PC Control Board

Imaje A19242-C/NS32621409 Motor Controller Board

Imaje A19244B Control Board

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Imaje A37883-D Control Board Card

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