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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，造成停機或死機等現(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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Agilent Technologies 6000 Series MSO6032A Mixed Signal Oscilloscope 300MHz

Agilent 54835A 1GHz 4 Channel Oscilloscope

Agilent N6030A Arbitrary Waveb Generator

Agilent - HP 4285A LCR METER

Agilent HP E4433B 4GHz Signal Generator Options UND/H99/UN5/100

Agilent / HP 85052B 3.5 mm Calibration Kit

Agilent HP E7401A EMC analyzer 9 kHz to 1.5 GHz

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Agilent N8731A 8V 400A 3200W Programmable Power Supply - One ping

Agilent / HP 8648D Signal Generator, 9 kHz to 4 GHz w/ Option 1E5: High Timebase

Agilent-HP E5061B Network Analyzer, 5 Hz to 3 GHz

Agilent 53210A 350 MHz RF Frequency Counter, 10 digits/s

ABB ACS500 30HP AC Drive ACS501-030-4-00P2 Ser B

Agilent MS06104A 1 GHz-4 GSa/s Mixed Signal Oscilloscope All Options Installed

Agilent - HP 8990A POWER ANALYZER

Agilent Technologies HP E6000B MM Fiber Mini OTDR With E6005A Module E6000

Agilent 10898A Dual Laser Axis Board

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ABB Bailey Infi 90 INNIS01 Network Interface Slave Module in the Factory

Agilent N5106A Loaded

Agilent / HP 83732B Synthesized Signal Generator 0.01 - 20 GHz with 1E1,1E5,1E8

Agilent/HP 8648C 3.2 Ghz Synthesized Signal Generator

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Agilent OmniBER 718 155Mb/s Multi-Rate Communication Perbance Analyzer 37718C

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Agilent / HP 4284A LCR Meter, 20 Hz - 1 MHz

Agilent Z5623A-H08

Agilent 1673G Logic Analyzer

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Aeroflex IFR 3920 with Multiple Options - Digital Radio Test Set

Agilent N5540A (N2X)

Agilent / HP 8593E Spectrum Analyzer 9kHz - 22 GHz with opt 021 +

Agilent/HP E8257D PSG Analog Signal Generator

Agilent 4284A-001 Precision LCR Meter, Refurbished

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Agilent PREMIUM N4691B Electronic Calibration Module

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Agilent / HP 81595A SC/APC 1X4 Switch

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Agilent HP E9327A Peak & Average Power Sensor 50MHz To 18Ghz

Agilent 16960A LOGIC ANALYZER

ABB 57360001HG2 REP

Agilent HP E9327A Power Sensor

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Agilent 11759D

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Agilent/HP 8751A Option 002 Baseband, IF and RF Network Analyzer 5 Hz to 500 MHz

Agilent 37718B-002,012,106,200,601,602

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Agilent N4001A 10MHz-18 GHz Noise Source

Agilent / HP 6032A DC Power Supply, 60V/50A

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Agilent 16900A Logic Analysis System Option 014 with QTY:2 16754A Plug-Ins

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Agilent N7711A-072-210

Agilent / HP 86130A BitAlyzer / 3.6 Gb/s Error Perbance Analyzer

Agilent/HP N8973A Noise Figure Meter; 10MHz to 3.0GHz

Agilent 4395A + 87511A /1D5/1D6 10Hz-500MHz Network Spectrum Impedance Analyzer

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Agilent / HP 83554A Millimeter-Wave Source Module, 26.5 GHz to 40 GHz

Agilent/HP 8563E 26.5 GHz Spectrum Analyzer

Agilent 34420A 7.5-Digit Nanovoltmeter/Micro-Ohm Meter w/Low Thermal Cable

ABB 5SDF0345D0006 Thyristor for ACS1000 AC Drive

Agilent HP MSO7054A Mixed Signal Oscilloscope

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Agilent N9020A MXA Signal Analyzer 20Hz-8.4Ghz, Calibrated with 30

Agilent / HP 8903B Audio Analyzer, 20 Hz to 100 kHz with Options 013 & 053

Air Products 2Cyl AXO-AP1402TSMA-WF6 214463

Agilent 54845A 1.5GHz, 8 GSa/s 4 Channel Oscilloscope

ABB ACS601-0050-5-000B1200000

AGILENT N1922A, 40 GHZ POWER SENSOR

AGILENT / HP 346C/K01 NOISE SOURCE

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Agilent 16195B

ABB 3HAC0373-1 Main Computer Board

Agilent HP E4419A Dual-Channel, Programmable Power Meter

Aeroflex IFR 2935 GSM Test Head / BASESATION Test Set

Agilent N5281A

Agilent / HP 8562B Spectrum Analyzer 9kHz to 22GHz

Agilent/HP E4403B/A4H/B72 Spectrum Analyzer - 9 kHz to 3 GHz, 8 MB Memory

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ABB ACH401B03032 AC Drive With Disconnect 380-480VAC WOW

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AGILENT - HP 3458A 8 1/2 DIGIT DIGITAL MULTIMETER W/ OPT 01 & MANUALS

Agilent PREMIUM E4428C-503 ESG Analog Signal Generator - 250kHz-3GHz -UNB

Agilent / HP E4808A High Perbance Central Clock Module, 10.8 GHz Plug-in

Agilent - HP 3582A SPECTRUM ANALYZER

Agilent PREMIUM E4438C-506-UNJ Signal Generator - 250 kHz - 6 GHz

Agilent / HP E4981A Capacitance Meter with Options 001 & 600

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Agilent HP 8753ES 3GHz Network Analyzer

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Agilent/HP 54855A 6Ghz 20GS/s w/opt. EZJIT Plus/Mem/High Speed Serial/eGUI/USB

Agilent 16950A /016 68ch 4GHz Timing/600M State 16MB Logic Analyzer Module

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Agilent N8737A Power Supply, 60V, 55A, 3300W

Agilent / HP 8648D Signal Generator, 9 kHz to 4 GHz with Options 1E2 & 1E5

Agilent-HP E5515C-003-E1962B Communications Test Set

Agilent 53230A 350 MHz Universal Frequency Counter/Timer, 12 digits/s, 20 ps

ABB ACS501-041-3-00P2000 | 12mo | Free EU ping | Inc UK VAT

Agilent MSO6032A 300 MHz, 2 + 16 Ch Mixed Oscilloscop w/op8ML 8 Mpts Memory

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Agilent 1134A InfiniiMax 7 GHz Differential Probe

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Agilent N5181A MXG RF Analog Signal Generator 100KHz - 3GHz

Agilent / HP 8449B Microwave Preamplifier, 1 GHz to 26.5 GHz w/

Agilent/HP 8664A 0.1-3000 Mhz Synthesized Signal Generator w/ opt 001, 010

Agilent 37718A

ABB 6400R M2000 robot with S4C+ control system

Agilent HP N4850A DigRF Digital Acquisition Probe

AFOI L-Band ASE Erbium Doped Broadband Source. 10 dBm

AGILENT OMNIBER 718 Communications Perbance Analyzer 37718A RARE OPT'S

Agilent / HP E4417A EPM-P Series Dual-Channel Power Meter, Tested.

ABB 086363-002 PC BOARD 086363002

Agilent 6629A System DC Power Supply with calibration

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Agilent N2X N5553A 4-port 10/100/1000 BASET 1000BASE-X (SFP) Ethernet XR2 Module

Agilent / HP 4395A Spectrum Network Impedance Analyzer: 10 Hz to 500 MHz + 010

Agilent/ HP 70340A Microwave Synthesizer, 1 GHz to 20 GHz

Agilent N2X N5603A 1-port 10Gb XR-2 Test Card (Ethernet LAN/ WAN XFP) w/

Agilent / HP 4396B Network/Spectrum Analyzer 30- + FRESH CAL

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ABB 3HNE00313-1

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Aeroflex IFR COM120B Communications Service Monitor

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Agilent / HP 8594E /004/101/102/130/041 Portable Spectrum Analyzer w/ Cal

Agilent/HP E8408A VXI C-Size MainFrame with option 001

Agilent 4287A RF LCR Meter, 1MHz to 3 GHz

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Agilent - HP 8341B Synthesized Sweep Generator

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Agilent HP 8920B RF Communications Test Set

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AES Canister Filter Model 5650S12/14A2

Agilent N8975A Noise Figure Analyzer,10 MHz to 26.5 GHz

Agilent / HP 8753A Network Analyzer, 300 kHz to 3 GHz + Option 010: Time Domain

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Agilent 54754A Differential TDR plug-in module w/2 Channels (for use with 86100)

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Agilent MSO8104A 1 GHz, 2/4 GSa/s, 4 Ch + 16 Digital Ch Mixed Sg Oscilloscope

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Agilent U2002A 10 MHz to 24 GHz, -60 dBm to +20 dBm USB Average Power Sensor

Agilent 11793A

ABB 3HAB-6182-1 PLC CPU Board DSQC-335 WOW

Agilent HP E4401B 1MHz-1.5GHz ESA-E Series Spectrum Analyzer

Aeroflex IFR 1500 Communications Service Monitor

Agilent N5230A PNA-L Network Analyzer - 30

Agilent HP E4401B Spectrum Analyzer

Aeroflex IFR 1600S Service Monitor

Agilent N5230A PNA-L Network Analyzer, 2-ports, 300kHz - 6GHz (Opt.020)

Agilent / Hp 8509B Polarization Analyzer System

Agilent/HP 8753E 30 kHz-3 GHz Network Analyzer Opt 1D5

Agilent 37718C -001-012-601

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