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DCS系統在工業生產過程的廣泛應用，使可靠性、穩定性問題更加突出，也使人們對整個系統要求越來越高。人們希望DCS系統盡量少出故障，又希望DCS系統一旦出現故障，能盡快診斷出故障部位，并盡快修復，使系統重新工作。下面簡單介紹故障大體分類及故障診斷的一般方法。
　　一、DCS系統故障的分類
　　為了便于分析、診斷DCS系統故障發生的部位和產生原因，可以把故障大致分為如下幾類。
　　1、現場儀表設備故障
　　現場儀表設備包括與生產過程直接聯系的各種變送器、各種開關、執行機構、負載等�，F場儀表設備發生故障，直接影響DCS系統的控制功能。在目前的DCS控制系統中，這類故障占絕大部分。這類故障一般是由于儀表設備本身的質量和壽命所致。
　　2、系統故障
　　這是影響系統運行的全局性故障。系統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或使用時間較長，模板內元件老化所致。
　　3、硬件故障
　　這類故障主要指DCS系統中的模板(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或使用時間較長，模板內元件老化所致。
　　4、軟件故障
　　這類故障是軟件本身所包含的錯誤所引起的，軟件故障又可分為系統軟件故障和應用軟件故障。系統軟件是DCS系統帶來的，若設計考慮不周，在執行中一旦條件滿足就會引發故障，造成停機或死機等現象。此類故障并不常見。應用軟件是用戶自己編定的。在實際工程應用中，由于應用軟件工作復雜，工作量大，因此軟件錯誤幾乎難以避免，這就要求在DCS系統調試及試運行中十分認真，及時發現并解決。
　　5、操作、使用不當造成故障
　　在實際運行操作中，有時會出現DCS系統某功能不能使用或某控制不封不能正常工作，但實際上DCS系統并沒有毛病，而是操作人員操作不熟練或操作錯誤所引起的。這對于初次使用DCS系統的操作工較為常見。

Schneider Telemecanique XBT NU400 XBTNU400

SIEMENS SIMATIC 6ES5432-4UA12 432-4UA12 INPUT MODULE

SCHNEIDER Telemecanique XCMD2102L1 Limit Switch XCM-D2102L1

Reliance Electric Remote I/O Interface 45C37B

SIEMENS 6ES5454-4UA12 SIMATIC OUTPUT MODULE 16PT QUANTITY

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SIEMENS 6FC5-203-0AB11-0AA2 USPP 6FC52030AB110AA2

AllenBradleyPanelView900OperatorInterface2711-T9C1SeriesC

ALLEN BRADLY VersaView 1700M OPERATOR INTERFACE DISPLAY 6186-M17ALTR SER. B

ABB Drive ACS800-02-0170-5+H358+P901 150 HP 3 Phase

ADEPT TECHNOLOGY PA-4 30336-31000 4 S ROBOT POWER SUPPLY RACK CHASSIS

(7432) Kawasaki Robotics PC Board 50999-1384 SEALED (7432)

INDRAMAT TDM1.2-100-300-W1/000 USPP TDM12100300W1000

WESTINGHOUSE A200M5CXXZ1 USPP A200M5CXXZ1

FANUC A06B-6059-H212 USPP A06B6059H212

EEC AEG 029.111.329 NSPP 029111329

RELIANCE ELECTRIC 801429-5RE USPP 8014295RE

NOVA 402AS3 USPP 402AS3

NIOBRARA R&D CORP EPE5-TCP-A NSPP EPE5TCPA

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Siemens S5 6ES5 318-8MB12 ET200U

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WS-X6148-GE-TX Cisco Classic Interface Module Expansion module 48 ports

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Reliance 0-56313-1

Schneider Modicon MINT AS-S911-801 ASS911801 Processor

Schneider Modicon AS-B243-105 USPP ASB243105

Schneider Modicon AS-P930-104 PLC

Schneider Modicon AS-B827-032 Input Module -

Schneider Modicon AS-B559-000 INPUT MODULE 9-56 VDC

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SIEMENS 6DD1681-0DH1 USPP 6DD16810DH1

SIEMENS SINUMERIK 802D SL 6FC5303-0DT12-1AA0 CNC KEYBOARD

SIEMENS 6SN1111-0AB00-0AA0 SURGE ARRESTOR OVERVOLTAGE LIMITING 611U

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SIEMENS 6FC9-348-7HP00 NSPP 6FC93487HP00

Advantech EVOC IPC-6106P3B Board

ALLEN-BRADLEY 1771-OG 1771OG TTL Output Module NIB NOS Free USA Shipping

ABB ACS60100096000B1200901 AC Drive 10HP 3 Phase 600V WOW

AD208BY QTY 10 IN AD208B ANALOG DEVICES IC AMP ISOL 4KHZ PREC 2MA 38SIP

6ES7468-1DE50-0AA0 Brand , Factory Sealed,

900' Syracuse aluminum urd 2/0-2/0-2/0-1 quadruplex wire direct burial cable

SQUARE D MHL3670035DC2351 NSFP MHL3670035DC2351

CONSULTRONICS DLS400 USPP DLS400

BAUMULLER BUS21-30/60-30-001 USPP BUS21306030001

MOOG D122-F022-A022 NSPP D122F022A022

MARATHON DM0140 USPP DM0140

ELECTRON MACHINE MPR83C-W/U5 USPP MPR83CWU5

Siemens 6ES5 135-3KA13 6ES51353KA13

Siemens 6ES5-465-4UA11 USPP 6ES54654UA11

SIEMENS 6ES5 984-2UA11 6ES59842UA11

SIEMENS S5 6ES5436-4UA12 6ES54364UA12

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SIEMENS 6ES7-331-7PF00-0AB0 6ES7331-7PF00-0AB0

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iConnect-FM.2 universal iPod adapter interface iPhone FM modulator transmitter

YASKAWA JVOP-112 REMOTE INTERFACE MODULE

SIEMENS 6ES5458-7LA11

Siemens MP270 6AV6542-0AD15-2AX0 Membrane Keypad

Omron G2A-434A

Schneider Modicon AS-BDAP-209 8PT OUTPUT MODULE

Schneider Modicon AS-506P-008 USPP AS506P008

Schneider Modicon AS-J890-102 ASJ890102 Free Ship

Schneider Modicon AS-516P-008 CNC Memory Board Rev C23 (UVG)

Schneider Modicon Electronics AS-W609-006 Cable Assy 6FT I/O Housing W609-006

Schneider Modicon -AS-9T14-100

SIEMENS/TI U-05N/9303 16 POINT 24VDC INPUT MODULE NIB

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SIEMENS SINUMERIK PROGRAM PANEL 6FC 5203 5210 5253

SIEMENS 505-4532 OUTPUT MODULE 5054532

SIEMENS SINUMERIK 810 BOARD 6FX1126-1AA01

COMMUNICATION PROCESSOR MODULE 6GK1543-0AA01

SIEMENS SIMODRIVE BOARD CARD 6SC6110-0PA01 6SC-6110

SIEMENS SIMODRIVE 6SN1145-1AA01-0AA1SINUMETIK 840D NCU-BOX 6FC52476FC5357 6SN

Advantech ECM-3610 REV.A1.2

ALLEN-BRADLEY 6182-AGAZAC INDUSTRIAL COMPUTER 100 TO 240VAC 50/60HZ 0.4/0.25AMP

ABB 3HAA3563-AHA S3 DSQC249B RECTIFIER BOARD

ACCURAY 083689-001 NSFP 083689001

A06B-6102-H226#H520

803-B64RH ALLEN BRADLEY LIMIT SWITCH

SIEMENS 6ES5-470-7LA13 NSFP 6ES54707LA13

ASEA BROWN BOVERI 3AFE61004955 NSFP 3AFE61004955

ALLEN BRADLEY 6182-AGAZAC USPP 6182AGAZAC

KROHNE IFM5090CAP/D/HART NSFP IFM5090CAPDHART

GROTH 1260A-04-555-TOZ NSPP 1260A04555TOZ

ACTUS POWER PUB33AX1B USPP PUB33AX1B

PMI MOTION AXA-180-10-30 USPP AXA1801030

Siemens 6ES5-340-3KB41 NSPP 6ES53403KB41

SIEMENS 6ES5 441-4UA13 -- 6ES54414UA13

SIEMENS S5 PLC6ES53067LA11 6ES5-306-7LA11

Siemens Memory Sub Module 6ES5 375-0LD11 37470

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SIEMENS OP7 6AV3607-1JC20-0AX1

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Toyopuc TLK-2685 PC1 I/O I/F Interface Module XLNT

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Modicon PE-0001-000

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Schneider Modicon AS-BZAE-204 High Speed Counter ASBZAE204

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Schneider M340 CPS3500 BMXCPS3500

PROFACE FN-HC10SK41 NSFP FNHC10SK41

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SIEMENS SIMODRIVE 6SN1145-1BA02-0CA1SINUMETIK 840D NCU BOX 6FC52476FC5357#2ZD

SIEMENS SINUMERIK 810D CCU-BOX 6FC5447-0AA01-0AA0

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553VIC14430 MODICON MONITORS CRT REMANUFACTURED

ABB TEACH PENDANT 3HNE 00313-1

A06B-0153-B084#0008 FANUC SERVO MOTORS REMANUFACTURED

7171 OLYMPUS ENCORE HIGH SPEED CAMERA MOTION ANALYSIS CAMERA

RELIANCE ELECTRIC 2EC4040 NSPP 2EC4040

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ALLEN BRADLEY 1398-PDM-010 USPP 1398PDM010

GENERAL ELECTRIC DS3800NRTB1A USPP DS3800NRTB1A

TOSHIBA VT130H2-U-4330 USPP VT130H2U4330

SYMAX 8030-CRM-540 NSPP 8030CRM540

FISHER ROSEMOUNT 1153DB5RC NSFP 1153DB5RC

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SIEMENS 6ES5 318-8MB13 ET200U - DP Profibus INTERFACE

SIEMENS 6ES5-931-7AA11 NSPP 6ES59317AA11

Siemens 6ES5 727-2DB00/6ES5727-2DB00 CP 526 PBT 982 CABLE XLNT

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Rigol Digital Color Oscilloscope 60MHz dual CH DS1062CA

Terasaki Electric TM-30D

SNMP Web based IP Interface Four4 Way Relay Module Board Controller

VWIC2-2MFT-T1/E1 CISCO

Siemens C7-633 6ES7 633-1DF02-0AE3 #2 ping Worldwide

Modicon AS-T584-103

Schneider Modicon Automation Inc DAP 216/AS-BDAP-216 DAP216ASBDAP216 Output Module

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Schneider Modicon AS-B885-100 USPP ASB885100

Schneider Modicon AS-B266-501

Schneider Modicon PC-0984-385 Programmable Controller with AS-9770-000

Schneider Modicon AS-P930-004 Rack

Schneider Automation / Modicon PanelMate Plus MM-PMC2-200 WARRANTY

SIEMANS SIMATIC TI305-02N INPUT MODULE TI30502N

RELIANCE ELECTRIC 0-57405 USPP 057405

Siemens 6ES7145-1GB31-0XB0 EM 145 EXPANSION ANANLOG OUTPUT MODULE

SIEMENS /ASCOM Fraco 77-964-1 SINUMERIK Power Supply Converter 60 DAYS WARRANTY

Omron C200H-LK201-V1 Serial Communications module

SIEMENS SIMODRIVE 611 6SN 1123-1AA00-0CA0 MORE AVAILABL

SIEMENS SINUMERIK PC CARD 6FC5247-0AA11-0AA2 NIB

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ALLENBRADLEY1771OD16ISOLATEDOUTPUTMODULE

Allen Bradley SLC-500 Output Mod. 16-Point 1746-OA16

ABB PC-D232 3BHE022293R0101

Zygo ZMI-2002 Measurement Board 8020-0211-01-J Rev.L

.. Square D 800A Fusible Main Switch Cat# QMB367MW ... X-53

MODICON AS-506P-F12 NSFP AS506PF12

ALLEN BRADLEY 1394C-SJT22-A NSFP 1394CSJT22A

GETTYS 110-094-2 NSFP 1100942

GE FANUC 44A751082-012R01 USPP 44A751082012R01

SIEMENS 6SC9111-2AJ25 USPP 6SC91112AJ25

SIEMENS 1FT6064-6AC71-3EG1 NSFP 1FT60646AC713EG1

ADEPT TECH 10315-00940 USPP 1031500940

Siemens 6es5 905-3RB11 Simatic S5-105R ZB/CPU

Siemens S5 6ES5 470-7LC12 6ES5470-7LC12

SIEMENS 6ES5-465-4UA12/6ES5465-4UA12 ANALOG INPUT MODULE XLNT

Siemens 6ES5 430-4UA13/6ES5430-4UA13 32 PT INPUT XLNT

Siemens S5 Rack 6ES5 700-2LA12 21514

Siemens DCS Module 6DS1140-8AA in box, seal opened

SERIES7 SLATE I5-2467M 1.6G 4GB PN XE700T1A-A05US

Square D 8055 SCP-654

SIEMENS 6ES5 318-8MB11 INTERFACE MODULE IN BOX

WE SHIP SAME CISCO WS-C3750V2-48PS-S SWICTH 1 YR

Siemens 6GK7 342-5DF00-0XE0 6GK7342-5DF00-0XE0 CP342-5

Siemens TP177B 6AV6 642-0BC01-1AX0 6AV6642-0BC01-1AX0

Schneider Modicon AS-B828-016 I/O Module

Schneider Modicon AS-BDEP-209 Compact AC IN Module ASBDEP209

Schneider Modicon AS-B806-032 USPP ASB806032

Schneider Modicon PC-0984-381 with AS-E381-902 984 mdl 381 Executive Cartridge Module

Schneider Modicon AS-P120-000 ASP120000 Power Supply

Schneider Modicon AS-B885-100 ASB885100 Motion Module

Schneider/Modicon PLC Analog Output Module 140ACO02000

SIEMENS 6ES7 321-1BL00-0AA0 SIMATIC S7 24 VDC DIGITAL INPUT MODULE

Sans Digital HA-ARC-ARC1882X 2 Port Mini-SAS 6GB PCI Express x8 RAID Controller

Siemens Genumerik 3G Board 6FX1191-1AB00 _548 190 9002 _ 6FX11911AB00

SIEMENS SINUMERIK 810 6EV 3055-0CC POWER SUPPLY TESTED WARRANTY

Siemens 6AV 1222-0AD20 6AV12220AD20 Communication Processor Module

SIEMENS 6SN1145-1BA00-0DA0 USPP 6SN11451BA000DA0

SIEMENS 6SN1114-0AA01-0AA0 PARAMETER BOARD - SIMODRIVE 611A

SIEMENS 6FC5-114-0AA02-0AA2 USPP 6FC51140AA020AA2

ALLENBRADLEYOUTPUTMODULE8POINTVAC/VDCRELAYMICROLOGIX1200

ALLEN BRADLEY X-355028 NSFP X355028

ABB DSAV-111 P/N.57350001-CN 61.2 Hz Video Board

ADI PMI OP227EY OP227EY T6223 IC chip good quality

(9203) Allen Bradley PLC-5/60 Processor Module W/KEYS

INDRAMAT TRANS-01.3 USPP TRANS013

XINIX 1011A-M USPP 1011AM

FANUC A16B-0160-0960 USPP A16B01600960

EMERSON 5A26391H18 USPP 5A26391H18

RELIANCE ELECTRIC 86466-60V NSFP 8646660V

OMRON C500-NC222-E NSFP C500NC222E

OMRON NT30C-ST141-E NSFP NT30CST141E

Siemens 6ES5 441-7LA11 6ES54417LA11

Siemens 6ES5-921-3WB14 USPP 6ES59213WB14

SIEMENS 6ES5-405-7AB21 USPP 6ES54057AB21

Siemens 6ES5 441-8MA11 -- 6ES54418MA11

Siemens S5 6ES5 421-8MA11 6ES54218MA11

Siemens 6SE7090-0XX84-0KB0 6SE7 090-0XX84-0KB0 FreeShip