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DCS系統(tǒng)在工業(yè)生產過程的廣泛應用，使可靠性、穩(wěn)定性問題更加突出，也使人們對整個系統(tǒng)要求越來越高。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，使系統(tǒng)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(tǒng)故障的分類
　　為了便于分析、診斷DCS系統(tǒng)故障發(fā)生的部位和產生原因，可以把故障大致分為如下幾類。
　　1、現(xiàn)場儀表設備故障
　　現(xiàn)場儀表設備包括與生產過程直接聯(lián)系的各種變送器、各種開關、執(zhí)行機構、負載等?，F(xiàn)場儀表設備發(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備本身的質量和壽命所致。
　　2、系統(tǒng)故障
　　這是影響系統(tǒng)運行的全局性故障。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(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(tǒng)軟件故障和應用軟件故障。系統(tǒng)軟件是DCS系統(tǒng)帶來的，若設計考慮不周，在執(zhí)行中一旦條件滿足就會引發(fā)故障，造成停機或死機等現(xiàn)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(tǒng)調試及試運行中十分認真，及時發(fā)現(xiàn)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(xiàn)DCS系統(tǒng)某功能不能使用或某控制不封不能正常工作，但實際上DCS系統(tǒng)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(tǒng)的操作工較為常見。

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Comm 2000 Learner's Guide Mod. 3 by AIT Staff 1995 Paperback

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ADVANTECH MIC-2718 REV.B1 01-2

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GS BPSIMA BOOSTER POWER SUPPLY INTERFACE MODULE CLS

Trillium Panther II 90-0474 Options Interface Module

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Schneider Modicon Module - AS-BDAP-210 - Excellent w/ 30 Day Warrantee

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PreSonus FireStudio Firewire Mobile Studio Interface Bundle Extended

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Allen-Bradley Panelview 1200 Operator Interface 2711-TC1X

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A06B-0153-B088#7000 FANUC SERVO MOTORS REMANUFACTURED

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ALLEN BRADLEY 1785-L80C NSPP 1785L80C

ALLEN BRADLEY 150-A97NA-ND USPP 150A97NAND

GENERAL ELECTRIC SPM-0-0 USPP SPM00

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Rev 2.01a SuperMicro H8DAE-2 Bulk Pack MB Support Six Core CPU

Texas Instruments 2587678-8005

Spirent Adtech 400308 AX/4000 ATM DS1/T1 Interface

VS-S2T-10G Cisco Catalyst 6500 Series Supervisor Engine 2T Control processor

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Modicon AS-T584-205

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Schneider Modicon AS-B802-000

Schneider Modicon PLC MODULE AS-B824-016 24 VDC OUTPUT

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Sharp JW-32N INPUT MODULE 12/24VDC 24VAC 32-POINTS

RELIANCE DRIVE ANALOG I/O MODULE 57405-C

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ALLENBRADLEY1771OBDSERIESCOUTPUTMODULE

Allen Bradley SLC500 F DC Output Module 1746-OBP16 Series C

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YORK 031-01730-000 USPP 03101730000

: Fluke 434-II Three-Phase Energy Analyzer (( Sale Item ))

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Siemens DCS Module 6DS1701-8AB

SCXI-1124 6-Channel Isolated Digital-to-Analog Converter Module DAC D/A

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Schneider Modicon / DTA-201/AS-HDTA-201 5-SLOT SUBRACK

Schneider Modicon AS-BDAU-252 Compact Analog Out ASBDAU252

Schneider Modicon AS-B808-016 USPP ASB808016

Schneider Modicon PLC INPUT MODULE B829 AS-B829-116

Schneider Modicon AS-P120-000 Power Supply 115-230 V (NCG)

Schneider Modicon AS-BDAO-216 Compact DAO 216 Discrete Output

Schneider/Modicon MM-PM21400C PanelMate Plus 2000C

SIEMENS 6ES7 321-1BH02-0AA0 SIMATIC S7 24 VDC DIGITAL INPUT MODULE

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Siebe LCMA-116-0-0-1 Local Control Module Communication Board

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SIEMENS 6SN1111-0AB00-0AA0 SIMODRIVE 611 SURGE ARRESTER

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Allen-BradleyMicroLogix1762-OW16SERARelayOutputModule

Allen Bradley X1771-OAD 16 Point Output Module Board

ABB DSQC 230 YB560103-BN Robotic Computer Board

ADI-SOP-AD9850BRS CMOS IC chip good quality

(A11) 1 Allen Bradley PROCESSOR MODULE 1785-LT4 (A11)

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OMRON NT20M-DT131 USPP NT20MDT131

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Spectrum Controls 8000 SRO-204

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Schneider Modicon AS-B846-001/ASB846001 Multiplexor

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MODICON MM-PM10-200 PANELMATE PLUS MONITOR

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