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DCS系統(tǒng)在工業(yè)生產(chǎn)過(guò)程的廣泛應(yīng)用，使可靠性、穩(wěn)定性問(wèn)題更加突出，也使人們對(duì)整個(gè)系統(tǒng)要求越來(lái)越高。人們希望DCS系統(tǒng)盡量少出故障，又希望DCS系統(tǒng)一旦出現(xiàn)故障，能盡快診斷出故障部位，并盡快修復(fù)，使系統(tǒng)重新工作。下面簡(jiǎn)單介紹故障大體分類(lèi)及故障診斷的一般方法。
　　一、DCS系統(tǒng)故障的分類(lèi)
　　為了便于分析、診斷DCS系統(tǒng)故障發(fā)生的部位和產(chǎn)生原因，可以把故障大致分為如下幾類(lèi)。
　　1、現(xiàn)場(chǎng)儀表設(shè)備故障
　　現(xiàn)場(chǎng)儀表設(shè)備包括與生產(chǎn)過(guò)程直接聯(lián)系的各種變送器、各種開(kāi)關(guān)、執(zhí)行機(jī)構(gòu)、負(fù)載等?，F(xiàn)場(chǎng)儀表設(shè)備發(fā)生故障，直接影響DCS系統(tǒng)的控制功能。在目前的DCS控制系統(tǒng)中，這類(lèi)故障占絕大部分。這類(lèi)故障一般是由于儀表設(shè)備本身的質(zhì)量和壽命所致。
　　2、系統(tǒng)故障
　　這是影響系統(tǒng)運(yùn)行的全局性故障。系統(tǒng)故障可分為固定性故障和偶然性故障。這類(lèi)故障一般比較明顯且影響也是局部的，它們主要是由使用不當(dāng)或使用時(shí)間較長(zhǎng)，模板內(nèi)元件老化所致。
　　3、硬件故障
　　這類(lèi)故障主要指DCS系統(tǒng)中的模板(特別是I/O模板)損壞造成的故障。這類(lèi)故障一般比較明顯且影響也是局部的，它們主要是由使用不當(dāng)或使用時(shí)間較長(zhǎng)，模板內(nèi)元件老化所致。
　　4、軟件故障
　　這類(lèi)故障是軟件本身所包含的錯(cuò)誤所引起的，軟件故障又可分為系統(tǒng)軟件故障和應(yīng)用軟件故障。系統(tǒng)軟件是DCS系統(tǒng)帶來(lái)的，若設(shè)計(jì)考慮不周，在執(zhí)行中一旦條件滿足就會(huì)引發(fā)故障，造成停機(jī)或死機(jī)等現(xiàn)象。此類(lèi)故障并不常見(jiàn)。應(yīng)用軟件是用戶自己編定的。在實(shí)際工程應(yīng)用中，由于應(yīng)用軟件工作復(fù)雜，工作量大，因此軟件錯(cuò)誤幾乎難以避免，這就要求在DCS系統(tǒng)調(diào)試及試運(yùn)行中十分認(rèn)真，及時(shí)發(fā)現(xiàn)并解決。
　　5、操作、使用不當(dāng)造成故障
　　在實(shí)際運(yùn)行操作中，有時(shí)會(huì)出現(xiàn)DCS系統(tǒng)某功能不能使用或某控制不封不能正常工作，但實(shí)際上DCS系統(tǒng)并沒(méi)有毛病，而是操作人員操作不熟練或操作錯(cuò)誤所引起的。這對(duì)于初次使用DCS系統(tǒng)的操作工較為常見(jiàn)。

Schneider Modicon -AS-884A-211

Schneider Modicon TSX COMPACT AS BDEP 254 BINARY

Schneider MODICON ADU206 ADU 206

SCHNEIDER Telemecanique LED XB2BVB4LC DC24V

SCHNEIDER MODICON 140CPU43412A 140 CPU 434 12A TSX Quantum

SIEMENS OPERATOR INTERFACE TOUCH PANEL SIMATIC TP27 6AV3 627 6AV3627-1QL01-0AX0

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SHIMADZU CBM-10A COMMUNICATIONS BUS MODULE

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ALLENBRADLEYISOLATEDOUTPUTPLCMODULE1771-ODZFACTORYSEALEDC15-3-52

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ADI-TSSOP-AD5292BRUZ-20 IC good quality

(A13) 1 GOULD MODICON AS-M507-016 REV A3 MEMORY MODULE A13

INDRAMAT TWM1.1-100-300-W1/115 NSPP TWM11100300W1115

YASKAWA ELECTRIC CIMR-G3U4030 USPP CIMRG3U4030

FANUC A20B-0007-0045 USPP A20B00070045

EUROTHERM DRIVES 545-0490-8-8-1-010-0011-0-00 USPP 5450490881010001

RELIANCE ELECTRIC DSA-MTR-20A USPP DSAMTR20A

PACIFIC SCIENTIFIC R67HENA-R2-NS-NV-00 USPP R67HENAR2NSNV00

PHOENIX DIGITAL OCM-DPR-85-D-ST NSFP OCMDPR85DST

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Siemens 6SL3040-0MA00-0AA1 NIB

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Spectrum Controls 8000STC-222

NEHB442ASP-N POWERLINK AS POWER INTERFACE MODULE

WS-X4515 CISCO CATALYST 4500 SUPERVISOR IV ENGINE W/2 GE

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Reliance 1SU44003

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Schneider Modicon AS-B266-501 NSFP ASB266501

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SIEMENS SINUMERIK 880 6FX1121-2BA03 6FX11212BA03

SIEMENS 6SN1-114-0NB01-0AA0 USPP 6SN11140NB010AA0

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Advantech PCA-6114P4-C REV.C2

ALLEN-BRADLEY 1771-OAD/C AC OUTPUT MODULE PLC S21C

ABB ADVAC 2000 Amp 15 KV AA3J2777XX000UP vacuum circuit breaker ANSI 2005

Adept 10338-53100 Rev P.A Dual B+ AMP

6SE3126-8CJ40 6SE-3126-8CJ40 MIDI MASTER MD1850/2

960 Altera EPM7064STC44-7 IC

STROMBERG SAFT-164-AIO USPP SAFT164AIO

CUTLER HAMMER 92-01815-03 USPP 920181503

CARRIER HK50AA020 USPP HK50AA020

NEMATRON CORP IWS1634R4 USPP IWS1634R4

MICROSTAR LABORATORIES DAP2400E USPP DAP2400E

FISHER ROSEMOUNT 3095MA3CA0013AA00NABS5 NSPP 3095MA3CA0013AA0

Siemens 6ES5 242-1AA32 -- 6ES52421AA32

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iPhone Android Samsung iPod Bluetooth Interface module Volvo car kit VOL01A3

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Parker AXL-DRIVE

Schneider Modicon AS-B875-111 Analog Input B877-111 ASB875111

Schneider Modicon AS-521P-007 USPP AS521P007

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Schneider Modicon 16 POINT 115V OUTPUT MODULE AS-B804-016 LOT OF 3

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ADVANTECH PCA-6103P2VX Rev.B1

Allen-Bradley 2711-T9C1 PanelView 900

ABB 3HAC022104-002 PC Board Flash Disk

Accuray 64844-001 64844001 Process Interface Board CSQ

A200M6CX CUTLER HAMMER SIZE 6 NON REVERSING STARTER - - (D)

810A20A ALLEN BRADLEY 810 A20A

SIEMENS 6ES5-948-3UA21 USPP 6ES59483UA21

ASEA BROWN BOVERI 57360001-KG/8 USPP 57360001KG8

ALLEN BRADLEY 8600-F18C USPP 8600F18C

MEASUREX 053676-00 USPP 05367600

HONEYWELL 51305552-100 USPP 51305552100

ALLEN BRADLEY 150-B35NBD USPP 150B35NBD

SCHWEITZER ENGINEERING SEL-279 USPP SEL279

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5KV 600A NEMA 1 LOAD INTERRUPT LI SWITCH

ABB YPQ 202A YT204001-KB Connection Unit

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75 HP 365T ODP ELECTRIC MOTOR 1800 PREMIUM Efficient for HVAC or Compressors

RELIANCE ELECTRIC 57652-A USPP 57652A

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GROSITE 4S9-04N-2Z00 NSPP 4S904N2Z00

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SIEMENS 6ES5 375-0LA15 6ES53750LA15

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A02B-0098-B512 Fanuc Series O-TTC Control: Max 4 Axes

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ALLEN BRADLEY 1395B-69D-1P50 USPP 1395B69D1P50

HEWLETT PACKARD TEST & MEASURE 54111D USPP 54111D

GE FANUC IC600BF842 NSFP IC600BF842

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SCHNEIDER MODICON 140CPU43412U 140 CPU 434 12U TSX Quantum

Square D 8997 EQ-5210 MMB-10

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Schneider Modicon TSX Compact AS-BDAP-220 Discrete Combi NIB

Schneider Modicon AS-BDAP-218Discreet Output Relay ASBDAP218

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Schneider Modicon AS-P933-001 984 HI PS ASP933001 IN BOX

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S HP MSA2000 3.5in Single I/O 12 Drive Enclosure AJ749A

SIEMENS Digital Output Module 6ES5456-4UB12 Surplus - Opened Box

SIEMENS SINUMERIK 820 6FX1137-5BA01 TESTED WARRANTY

Schneider TSXSCP114 Communication Module PCMCIA WOW

SIEMENS 6SN1161-1CA00-0AA1 6SN11611CA000AA1 DRIVE BUS CABLE

SIEMENS 6SC6110-3AA00 Simodrive Feed Module

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AllenBradley800MR-NX100BSelectorSwitch2PositionNIBOnly1Left

ALLEN BRADLEY W53 NSPP W53

ABB DSQC236D 3HAB-2207-1/3

ADTEC AX 3000, RF Plasma Generator, Novellus R 27-176875-00, rebuilt

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JDS FITEL RX3030-1041FA2 USPP RX30301041FA2

ACCURAY 069829-002 NSPP 069829002

FISHER ROSEMOUNT 620641 USPP 620641

FANUC A02B-0098-B511 USPP A02B0098B511

ROBICON 463-990.01 USPP 46399001

POWERTEC INDUSTRIAL MOTORS INC A18CMF1000100000 USPP A18CMF1000100000

RELIANCE ELECTRIC 0-52819 USPP 052819

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