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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及故障診斷的一般方法。
　　一、DCS系統(tǒng)故障的分類
　　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。
　　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，這類故障占絕大部分。這類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。此類故障并不常見。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。

SICK OPTIC ELECTRONIC S30A-7011BA USPP S30A7011BA

INDRAMAT HDS03.2-W075N USPP HDS032W075N

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ALLEN BRADLEY SLC 500 1746-OW16 16 CHANNEL RELAY OUTPUT MODULE W/CABLE

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A06B-0143-B184#7000 FANUC SERVO MOTORS REMANUFACTURED

0-150MHz Amplitude frequency characteristics meter analyzer X1-54 an-g Agilent

MSA AMDL50005600G12000 NSFP AMDL50005600G120

ALLEN BRADLEY 1747-L553P NSFP 1747L553P

ALLEN BRADLEY 1336-B007-ECD-FC3-L3 USPP 1336B007ECDFC3L3

GENERAL ELECTRIC 3VWHS553CD08 USPP 3VWHS553CD08

SQUARE D NA-361200 USPP NA361200

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AUTOCON TECHNOLOGIES INC 96031186 USPP 96031186

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Siemens Simatic S5 6ES5 526-3LA22 6ES55263LA22

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Schneider Modicon AS-BDEP-220 TSX Compact Discrete Input

Schneider Modicon ASB881108 PERFECT TESTED 120VAC Protected Output Module AS-B881-108

Schneider Modicon AS-B840-008 USPP ASB840008

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SIEMENS 6ES5420-4UA14 SIMATIC S5 DIGITAL INPUT MODULE NIBBNO

ROBOTRON 503-1-0324-15 USPP 5031032415

SIEMENS C8451-A42-A36-2 DIGITAL OUTPUT MODULE XLNT

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RELIANCE ELECTRIC AUTOMAX REMOTE I/O COMMUNICATIONS MODULE 57416-P

SIEMENS CONTROLLER CARD 6SN1118-0DM21-0AA0

SIEMENS 6SN1123-1AA00-0CA2 6SN11231AA000CA2 SimoDrive

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AllenBradley2711P-RDT7C/C2711PRDT7CPanelviewPlusMFG2012

ALLEN BRADLEY VersaView 1500M OPERATOR INTERFACE DISPLAY 6186-M15AL SER. B

ABB HVAC AC Drive 60 KVA 60HP ACH401606035 +H0AE Electronic Bypass Tested

Advanced Energy LDM plasma RF generator 2026-000-D

(N2-2) 1 RELIANCE ELECTRO-CRAFT DDM-030 9101-1396 SERVO DRIVE N2-2

MEASUREX 053630-00 NSPP 05363000

ALLEN BRADLEY 1336-B030-EAF-S1-HJP-L1 USPP 1336B030EAFS1HJP

GE FANUC IC600LX616 NSFP IC600LX616

FANUC A14B-0046-B005-01 USPP A14B0046B00501

SIEMENS 6AV6-381-1BQ05-1AX0 USPP 6AV63811BQ051AX0

RELIANCE ELECTRIC 20V4151 USPP 20V4151

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Siemens 6ES5 470-4UB12 -- 6ES54704UB12

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Square D 8020 SCP-523

OFFER WIN TURCK TS10-316-8MA11 INTERFACE MODULE SIEMENS SUPPLY

WS-C3560E-48PD-SF FREE 1 YEAR CISCO WSC3560E48PDSF

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Siemens SIMEAS P 6GK7000-8AA

Reliance 84543-133

Schneider Modicon ASS908110 Excellent Remote I/O Processor Module AS-S908-110

Schneider Modicon AS-B521-001 USPP ASB521001

Schneider Modicon AS-W511-002 USPP ASW511002

Schneider Modicon AS-BDAP-220 combo

Schneider Modicon AS-B825-016

MODICON AS-B230-120 OUTPUT MODULE ASB230120 REPAIRED

Siemens Input Analog Module 6ES5460-7LA11

Shuttle SZ68R5 Barebone system LGA1155 Inb Z68 Chipset-no CPU no memory

SIEMENS OPERATOR INTERFACE PMU 6SE7090 0XX84 2FB0 2FBO

SIEMENS Sinumerik 6EV1362-5BK00 24V @ 40Amps.

TELEMECANIQUE SCHNEIDER TSX MPT 104 TELWAY 7 COMMUNICATION MODULE

SIEMENS 6SN1118-0DM33-0AA0 6SN11180DM330AA0 Version C

SIEMENS Simo Simodrive Drive 3-531-4647A

SIEMENS 6FC5356-0BB11-0AE1 SINUMERIK 840D NCU561.3 QUANTITY

Advantech PCM-9381

Allen-Bradley 1746-NO4V SLC 500 4-Ch Analog OUTPUT Module

ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 88135

ADEPT TECH 10330-11351 USPP 1033011351

(000 FLR) Allen Bradley 15 HP Drive 1336-B015-EOE

INDRAMAT CCD01.1KE19-01FW USPP CCD011KE1901FW

TELEMECANIQUE ATS-46C48N USPP ATS46C48N

DYNASERV DR-1100A-115 USPP DR1100A115

CUTLER HAMMER 91-00747-00 NSPP 910074700

PERFORMANCE TECHNOLOGY PT-CPC396N-11235 USPP PTCPC396N11235

MODICON AS-521P-006 NSFP AS521P006

HONEYWELL 51303940-150 NSFP 51303940150

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Siemens 6ES5-526-3LB11 USPP 6ES55263LB11

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LECROY qVt CAMAC INTERFACE MODULE 2301 C14-3-23

Yaskawa 87820-40051 PLC Module 8782040051 NIB

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Siemens OP37 6AV3637-1LL00-0AX1 Membrane Keypad, ping Worldwide

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Schneider Modicon AS-B805-016 Input Module ASB805016

Schneider Modicon AS-884A-301 USPP AS884A301

Schneider Modicon AS-P190-212 USPP ASP190212

Schneider Modicon AS-B260

Schneider Modicon AS-8534-000 High/Low Density Connector

Modicon TSX Discrete Output Module DAP210 / AS-BDAP-210

Siemens Simatic S7 High Speed Input Encoder Module 6ES7 350-2AH00-0AE0

Telemecanquie XBTG5230

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Siemens 9350 9350DC-100-0NZZZA NIB Power Meter Display ION Profibus Access

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SIEMENS ENCODER 6FC9320-3KA00

Advantech PCM-9340N A1

ALLEN-BRADLEY 2711E-T14CB PANELVIEW 1400E

ABB 61433643 CHARGING MONITORING KIT NCHM-11 SEALED

Acterna ANT-5 SDH Access Tester Optical Option BN4565/00.16 Acterna/JDSU

6AV2181-4MB00-0AX0 Starter Kit SIMATIC HMI Comfort TP1200

8520-MOP ALLEN BRADLEY MONITORS CRT REMANUFACTURED

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BAILEY CONTROLS IMAMM-03 NSPP IMAMM03

ASEA BROWN BOVERI S6N600BW-4 USPP S6N600BW4

MODICON 553-VIC-144-30 USPP 553VIC14430

INDRAMAT MDD-090C-N-030-N2L-110PB0 USPP MDD090CN030N2L1A

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Siemens S7 400 CPU 6ES7 414-2XG03-0AB0 NIB

Siemens 305DC-02B

HONEYWELL INTERFACE MODULE Q7230A 1005 NIB

WARRANTYSERIES A F/W REV 2.005 MFG 02/09/2009

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Siemens LOGO! 24 PLC 6ED1052-1CA00-0BA0 NIB

Omron 3G2A5-RM001E

Schneider Modicon AS-M680-108 ASM680108

Schneider Modicon MODULE AS-B275-501 INPUT S43A

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Schneider Modicon Groupe // AS-W808-002 warranty

Schneider Modicon AS-BDEP-216

Schneider Modicon REMOTE I/O PROCESSOR MODULE AS-S908-110

Telemecanique LA-DT4C Time Delay Module

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SIEMENS/TI CVU100/2588958-0001 OPERATOR INTERFACE XLNT

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GE Fanuc CCM IC655CCM500 communication module

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SIEMENS Sinumeric 6FC5203-0AE00-0AA0 tested warranty

SIEMENS ACROMAG/SIEMENS/MOORE 15494-126-5/15494-268/1018-228F XLNT

Allen-Bradley Analog Output Module User's Manual_1987_95510323

AB Stromberg 200052 ABB 57275812 AIO86-8/4 3100-AIO

AC Motor Speed Control VFD - 50 HP - 480 Volt - Three Phase Input

A06B-0754-B201#3000 FANUC AC SERVO SPINDLE REMANUFACTURED

7596 - , Danaher Motion SM 100-K 3000-G Brushless Servo Motor

RELIANCE ELECTRIC UVZ3475 USPP UVZ3475

ALLEN BRADLEY 570-DOB-47 NSFP 570DOB47

ALLEN BRADLEY 2364-SPG04A NSFP 2364SPG04A

INDRAMAT MAC112C-2-KD-4-C/130-A-0/WI520LX/S005 USPP MAC112C2KD4C130A

YASKAWA ELECTRIC JANCD-CP02 USPP JANCDCP02

WESTINGHOUSE A210M3CAC USPP A210M3CAC

ISSC 627-1002 USPP 6271002

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SIEMENS 6ES5 377-0AB21 -FS- 6ES53770AB21

SIEMENS OP-393 II C 6ES5 393-0UA13 OP393 6ES5393-0UA13 OP 393-II C

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RELIANCE 0-57401-2/0574012/O-57401-2 AUTOMAX DIGITAL I/O MODULE RFB

Texas Instruments 505-6108

Sunpak Interface Module HA-1D Hasselblad 500ELX cameras

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Modicon DO-1130-000

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Schneider Modicon ASB804116 SEALED 16pt 115VAC Out AS-B804-116

Schneider Modicon AS-BDEP-215 NSFP ASBDEP215

Schneider Modicon AS-BDAP-258 Compact Out Module ASBDAP258

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QLogic SANBox FC Switch 5602 20-Port SB5602Q-20A 4GB Fabric Switch Dual PS

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