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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(gè)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(shí)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(shí)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(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。這對于初次使用DCS系統(tǒng)的操作工較為常見。

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PSC Falcon 4220 Windows CE .NET PDA

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QUALITROL IDM-T2-IDM-DAU-DFRO-U/G NSPP IDMT2IDMDAUDFROU

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GENERAL ELECTRIC DS3800NEPA1E1D USPP DS3800NEPA1E1D

TEXAS INSTRUMENTS PLC 6EA1710-0AA00-2AA1 USPP 6EA17100AA002AA1

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RELIANCE ELECTRIC 45C-201C USPP 45C201C

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Schneider Modicon AS-B804-116 OUTPUT MODULE 115VAC

Schneider Modicon LOCAL I/O INTEFACE EXPANDER MODEL AS-J200-001

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ABB DRAW-OUT KIT CAT#K7WR-H REAR CONNECTION S7 HORIZONTAL NIB

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(6846) Reliance Electric High Speed Driver 0-54200-3 (6846)

INDRAMAT TDM1.2-050-300-W1-000 NSPP TDM12050300W1000

WESTINGHOUSE 4D14854G02 USPP 4D14854G02

FANUC A06B-6059-H003 NSFP A06B6059H003

DYNAVISION S-16-24 USPP S1624

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NIPPON DENSO US-241 USPP US241

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Siemens 6ES5 430-8MC11

Siemens S5 6ES5 308-3UB11 6ES53083UB11 Interface Module

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Mitsubishi AJ71UC24 Melsec Ethernet Interface Module AJ71-UC24

WS-X6502-10GE CISCO 6500 10 GIGABIT ETHERNET BASE MODUL

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Siemens Profibus DP 6ES7972-0BB50-0XA0 NIB

Reliance 0-56308-1

Schneider Modicon / 3M Cable Assembly AS-W808-002 _ ASW808002 Groupe /

Schneider Modicon AS-B239-001 NSFP ASB239001

Schneider Modicon AS-P930-007 USPP ASP930007

Schneider Modicon AS-B825-016 PLC

Schneider Modicon AS-B556-101 OUTPUT MODULE 5V TTL

Modicon MPCST52NDJ10T Telemecanique Magelis Smart iPC

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SIEMENS 6DD1681-0AJ1 CONVERTER SU12 SIMADYN

SIEMENS SINUMERIK 800 6FX1151-1BD01 6FX11511BD01

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6ES7467-5GJ01-0AB0 6ES7467-5GJ02-0AB0 Brand , Factory Sealed,

900' Rust 250MCM 250 MCM 3/0 Rust Aluminum Cable Wire URD 600 volt

SQUARE D MEL36800LSG USPP MEL36800LSG

COMPUMOTOR DR-1400A60 USPP DR1400A60

BAUMULLER BUM60-VC-AE-1024 USPP BUM60VCAE1024

MODICON S975-000 USPP S975000

MAGNETEK 53SHC000-0003 USPP 53SHC0000003

ELECTRO CRAFT 9101-1131 NSPP 91011131

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SIEMENS 6ES5 956-0AA12 6ES59560AA12

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