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DCS 的維護可分為：日常維護;預防性維護和故障維護，日常維護和預防維護是在系統(tǒng)未發(fā)生故障所進行的維護。故障維護發(fā)生在故障產(chǎn)生之后,往往 已造成系統(tǒng)部分功能失靈并對生產(chǎn)造成不良影響;相反,預防性維護是在系統(tǒng)正常運行時,對系統(tǒng)進行有計劃的定期維護,及時掌握系統(tǒng)運行狀態(tài)、消除系統(tǒng)故障隱 患、保證系統(tǒng)長期穩(wěn)定可靠地運行,形成定期維護的概念。實踐證明,定期維護能夠有效地防止DCS 突發(fā)故障的產(chǎn)生,形成可觀的間接經(jīng)濟效益。
　　DCS 系統(tǒng)的日常維護
　　系統(tǒng)的日常維護是DCS系統(tǒng)穩(wěn)定高效運行的基礎，主要的維護工作有以下幾點：
　　1) 完善DCS系統(tǒng)管理制度。
　　2) 保證空調(diào)設備穩(wěn)定運行,保證室溫變化小于±5℃/h ,避免由于溫度、濕度急劇變化導致在系統(tǒng)設備上的凝露。
　　3) 盡量避免電磁場對系統(tǒng)的干擾,避免移動運行中的操作站、顯示器等,避免拉動或碰傷設備連接電纜和通訊電纜等。
　　4) 注意防塵，現(xiàn)場與控制室合理隔離，并定時清掃，保持清潔，防止粉塵對元件運行及散熱產(chǎn)生不良影響;
　　5) 嚴禁使用非正版軟件和安裝與系統(tǒng)無關(guān)軟件。
　　6) 做好控制子目錄文件的備份,各自控回路的PID 參數(shù)、調(diào)節(jié)器正反作用等系統(tǒng)數(shù)據(jù)記錄工作。
　　7) 檢查控制主機、顯示器、鼠標、鍵盤等硬件是否完好,實時監(jiān)控工作是否正常。
　　8) 查看故障診斷畫面,是否有故障提示。
　　預防維護
　　有計劃地進行主動性、預防性維護,保證系統(tǒng)運行穩(wěn)定可靠。根據(jù)大修周期，利用大修進行一次預防性的維護，以掌握系統(tǒng)運行狀態(tài),消除故障隱患。大修期間對DCS 系統(tǒng)應進行徹底、全面的維護，內(nèi)容包括：
　　1) 系統(tǒng)冗余測試: 對冗余電源、服務器、控制器、通訊網(wǎng)絡進行冗余測試。操作站、控制站停電檢修。包括計算機內(nèi)部、控制站機籠、電源箱等部件的灰塵清理。
　　2) 系統(tǒng)供電線路檢修。并對UPS進行供電能力測試和實施放電操作。
　　3) 接地系統(tǒng)檢修。包括端子檢查、對接地電阻測試。
　　大修后系統(tǒng)維護負責人應確認條件具備方可上電，并應嚴格遵照上電步驟進行。

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Square D 8803-PS01

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Schneider Modicon TSX COMPACT DISCRETE OUTPUT AS-BDAP-210 LOT OF 4

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Advantech PCA-6186VE PCA-6186 Rev.A1 NIB

Allen-Bradley 2711-T6C15L1 Panelview 600

ABB 3HNE00323-1

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A300-30-11-84 - CONTACTOR 50

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RELIANCE ELECTRIC 78469-1R USPP 784691R

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HONEYWELL 4DP7APXOA-311 USPP 4DP7APXOA311

WESTINGHOUSE NB3800PF NSFP NB3800PF

THK GL15S16-1250L-C NSFP GL15S161250LC

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Texas Instruments 500-5001

Spirent Adtech AX/4000 401383 OC3c/12c L3 MM Interface

VG224 CISCO 24 PORT VOICE OVER IP ANALOG PHONE GATEWAY

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Allen Bradley SLC 500 Output Module 1746-OW16 with FLKM Terminal Block Interface

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0.15-1000V,0.1-300A 0,2 Ammeter&Voltmeter Verification kit Y300 an-g FLUKE HP

MODICON AS-M909-022 USPP ASM909022

ALLEN BRADLEY 143679 USPP 143679

ADEPT TECH 10332-12350 USPP 1033212350

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SIEMENS R15C02-188 USPP R15C02188

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ALLEN BRADLEY 512-M-BJCD-24 NSPP 512MBJCD24

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SCHNEIDER 170 AMM 090 00/170AMM09000 ANALOG I/O MODULE XLNT

Square D 9013GSG-2

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Schneider Modicon TSX COMPACT DISCRETE INPUT DEP 216 AS-BDEP-216 5

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ALLENBRADLEY6181P-15TSXPHSER.CVersaView1500PINDUSTRIALCOMPUTER

ALLEN BRADLEY VERSAVIEW CE 6182H-12TRH4D 6182H12TRH4D

ABB E4S-A 3200 Amp SACE Breaker EMAX 600V E4SA 32 E4S3200 Bolt On BO

ADTRAN 4200663L1 USPP 4200663L1

(H2-5) 1 HORTON 912010 LH8B PHOTOHEADLINE FOLLO. H2-5.

KEYENCE CORP LS-5121 NSFP LS5121

ADEPT TECH 10332-00655 USPP 1033200655

FLUKE 720A USPP 720A

FANUC A06B-0162-B175 NSFP A06B0162B175

SEW EURODRIVE MDV60A-0220-503-4-0T USPP MDV60A022050340T

RELIANCE ELECTRIC 0-48673 NSPP 048673

ROBERTSHAW DMS-ETH-001 USPP DMSETH001

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Siemens S5 6ES5 470-7LC12 6ES54707LC12

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Square D 8005 RT-108

NORTEL APLICATION MODULE NT5B74AABJ w/ Interface Card MS-BIC NTBB80AA

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Reliance 54394-1

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Schneider Modicon AS-B353-001 NSFP ASB353001

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Schneider Modicon AS-B807-032 50/60 HZ 120v INPUT

MODICON AS-BDAP-209 8PT OUTPUT MODULE

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SIEMENS PLC OUTPUT MODULE 6ES5-456-4UB12 6ES54564UB12

SIEMENS EA-12 ANALOG OUTPUT MODULE 6DD1642-0BC0

Turck JBBS 57-E811 Bus Stop DeviceNet & DIP CDN066 Devicenet Communication Modul

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SIEMENS Simodrive 611 6SN1118-0BJ11-0AA0 6SN1 118

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Advantech PCL-722 144 Bit DIO Card

Allen-Bradley 1769-OW16 16 Point Relay Output Module FACTORY SEALED MFG.2011

ABB AUTOMATION MERLIN CONTROLLER EXTREL

ADEPT PA-4 POWER SUPPLY RACK 4 S 30336-31000

6SE7090-0XX84-0AD1 SIEMENS CUMC (MOTION CONTROL) CONTROL BOARD FOR MASTERDRIVE

HONEYWELL 51305319-100 NSPP 51305319100

SYMAX 8030-RIM-126 NSFP 8030RIM126

CUTLER HAMMER SVX020A24A1B1 FNFP SVX020A24A1B1

CONTROL TECHNIQUES 142UME301CACAA USPP 142UME301CACAA

OMRON 3G3RV-A2300-AV1 NSFP 3G3RVA2300AV1

MITSUBISHI TS5690N3820+MU1606N302 NSFP TS5690N3820MU160

GENERAL ELECTRIC 531X139APMAKM6 USPP 531X139APMAKM6

Siemens 6ES5 267-8MA11 Stepper Motor Modul NIB!!!

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SIEMENS 6ES5-312-5AA12 USPP 6ES53125AA12

Siemens S56ES5 318-8MC11

Siemens 6ES5 815-OUB12 S5 V 1.4 Log Module NOS

Siemens 6FX2003-0DS00 RS232 Isolator

Siemens TP177 Membrane Keypad

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KENWOOD KCA -SR50 SIRIUS Sablite Radio Interface Module Kit

YOKOGAWA K9296BA USPP K9296BA

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Power One spl53-4101

Schneider Modicon AS-B838-032/ASB838032 Remanned

Schneider Modicon AS-584M-240 USPP AS584M240

Schneider Modicon AS-M84A-102 USPP ASM84A102

Schneider Modicon AS-9595-001 Memory Module Lot of 4

Schneider Modicon AGE B872 Analog Voltage Output - AS-B872-200

Schneider Modicon /Modicon/AS-HDT-201 Subrack 5-slot NIB

Siemens SM321 Input Module VIPA 321-1BL00 VIPA 3211BL00

Telemecanique Inverter Operator Panel ATV71

SIEMENS SIMATIC S7 6ES7 374-2XH00-0AA0

SIEMENS 305-20T OUTPUT MODULE 30520T

SIEMENS SINUMERIK 840DE 6FC5357-0BB11-0AE0 NCU 571.2

BMW E65 E66 VOICE COMMAND INPUT MODULE COMPUTER SES RECOGNITION 745 750 760

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SIEMENS OPERATOR INTERFACE 6FC5103-0AB01-0AA2

Advantech PCI-881 REV.3 board

Allen-Bradley 2711P-B6C20D PanelView Plus 600; Color/Touch/Ethernet/RS-232

ABB 52614759 / CPU86-U / CPU86U / CPU86 U / CPU86/U