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DCS系統(tǒng)在工業(yè)生產(chǎn)過程的廣泛應(yīng)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(fù)，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(chǎn)生原因，可以把故障大致分為如下幾類。
　　1、現(xiàn)場儀表設(shè)備故障
　　現(xiàn)場儀表設(shè)備包括與生產(chǎn)過程直接聯(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)或使用時間較長，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)或使用時間較長，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)帶來的，若設(shè)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(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(shí)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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TAYLOR ELECTRONICS 6214BZ10110G USPP 6214BZ10110G

DANFOSS VLT3504 USPP VLT3504

CONTROL TECHNIQUES M75R-14ICD USPP M75R14ICD

OMRON Z4M-T30V2 USPP Z4MT30V2

MODICON 557VIC12430 USPP 557VIC12430

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Kingspec Flash DOM Disk On Module 32GB 40Pin Vertical IDE PATA Interface MLC

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Red Lion dt500000

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Allen-Bradley 2711-M14 Monitor

ABB 57310001-MP

Acme T-2A-350012-3S 112.5 KVA 480 X 480/277 Volt Transber - T295

Aaronia HyperLOG 30180 Antenna -

85051-60006 Beatty Standard; replaced by 85051-60011

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ASEA BROWN BOVERI QDBB-153M USPP QDBB153M

ASEA BROWN BOVERI 57360001-HG USPP 57360001HG

MITSUBISHI HC-H702S-A42 NSFP HCH702SA42

INDRAMAT KDF1.1-100-300-W1/220 USPP KDF11100300W1220

ALLEN BRADLEY 8600-1870X USPP 86001870X

SYMAX 8994-SYS80 USPP 8994SYS80

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Schneider Modicon AS-EM85-301 NSPP ASEM85301

Schneider Modicon GOULD PROGRAM PACK AS-P371-002

Schneider Modicon AS-BDAP-209

Schneider Modicon Program Terminal w/ Keyboard AS-P190-212 with keyboard cover & key

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Schneider Telemecanique Contactor LC1D09 M7C

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ALLENBRADLEY FLEX I/O ANALOG OUTPUT MODULE CAT:1794-OF4I

AB Allen Bradley PowerFlex 400 22C-D105A103 Ser A 75 HP

AC Motor Control Drive - 60 HP - 480 Volt - Three Phase Input

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75 Ton Liqui-Chill Chiller '95

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ALLEN BRADLEY 500-GOB-930 USPP 500GOB930

ALLEN BRADLEY 1785-L40B/E NSPP 1785L40BE

INDRAMAT DDC01.2-N200A-DS50-01-FW USPP DDC012N200ADS50A

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HONEYWELL 30752387001 NSPP 30752387001

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Texas Instruments 500-5828A

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00415 GE IC640MWS902A Demo Unit

MOORE PRODUCTS 39ACM28ADN USPP 39ACM28ADN

ALLEN BRADLEY 150B97NBD8L NSPP 150B97NBD8L

ALLEN BRADLEY 1326AS-B440G-21-K4 USPP 1326ASB440G21K4

GENERAL ELECTRIC 36C774505ABG01 USPP 36C774505ABG01

SQUARE D KCL341252361 NSFP KCL341252361

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ASEA BROWN BOVERI APSAF-03 USPP APSAF03

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SANS DIGITAL MR4UT 4-bay hot-swap hardware RAID storage

Square D SERIPIEX SET-UP TOOL

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Schneider Modicon Compact AS-PRTU-252 ASPRTU252 NIB

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MARPOSS 3708630010 NSPP 3708630010

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GE FANUC IC3600STKK1 NSFP IC3600STKK1

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Square D 8020 SCP-401

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Reliance 803456-2R