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DCS 的維護(hù)可分為：日常維護(hù);預(yù)防性維護(hù)和故障維護(hù)，日常維護(hù)和預(yù)防維護(hù)是在系統(tǒng)未發(fā)生故障所進(jìn)行的維護(hù)。故障維護(hù)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(duì)生產(chǎn)造成不良影響;相反,預(yù)防性維護(hù)是在系統(tǒng)正常運(yùn)行時(shí),對(duì)系統(tǒng)進(jìn)行有計(jì)劃的定期維護(hù),及時(shí)掌握系統(tǒng)運(yùn)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(yùn)行,形成定期維護(hù)的概念。實(shí)踐證明,定期維護(hù)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(jì)效益。
　　DCS 系統(tǒng)的日常維護(hù)
　　系統(tǒng)的日常維護(hù)是DCS系統(tǒng)穩(wěn)定高效運(yùn)行的基礎(chǔ)，主要的維護(hù)工作有以下幾點(diǎn)：
　　1) 完善DCS系統(tǒng)管理制度。
　　2) 保證空調(diào)設(shè)備穩(wěn)定運(yùn)行,保證室溫變化小于±5℃/h ,避免由于溫度、濕度急劇變化導(dǎo)致在系統(tǒng)設(shè)備上的凝露。
　　3) 盡量避免電磁場對(duì)系統(tǒng)的干擾,避免移動(dòng)運(yùn)行中的操作站、顯示器等,避免拉動(dòng)或碰傷設(shè)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(shí)清掃，保持清潔，防止粉塵對(duì)元件運(yùn)行及散熱產(chǎn)生不良影響;
　　5) 嚴(yán)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(jī)、顯示器、鼠標(biāo)、鍵盤等硬件是否完好,實(shí)時(shí)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(yù)防維護(hù)
　　有計(jì)劃地進(jìn)行主動(dòng)性、預(yù)防性維護(hù),保證系統(tǒng)運(yùn)行穩(wěn)定可靠。根據(jù)大修周期，利用大修進(jìn)行一次預(yù)防性的維護(hù)，以掌握系統(tǒng)運(yùn)行狀態(tài),消除故障隱患。大修期間對(duì)DCS 系統(tǒng)應(yīng)進(jìn)行徹底、全面的維護(hù)，內(nèi)容包括：
　　1) 系統(tǒng)冗余測試: 對(duì)冗余電源、服務(wù)器、控制器、通訊網(wǎng)絡(luò)進(jìn)行冗余測試。操作站、控制站停電檢修。包括計(jì)算機(jī)內(nèi)部、控制站機(jī)籠、電源箱等部件的灰塵清理。
　　2) 系統(tǒng)供電線路檢修。并對(duì)UPS進(jìn)行供電能力測試和實(shí)施放電操作。
　　3) 接地系統(tǒng)檢修。包括端子檢查、對(duì)接地電阻測試。
　　大修后系統(tǒng)維護(hù)負(fù)責(zé)人應(yīng)確認(rèn)條件具備方可上電，并應(yīng)嚴(yán)格遵照上電步驟進(jìn)行。

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Allen Bradley SLC 500 Output Module 1746-OB8

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A06B-0142-B084#0008 FANUC SERVO MOTORS REMANUFACTURED

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ADEPT TECH 30846-00020 NSPP 3084600020

GE FANUC IC800SSI104RS1MOD1-BC USPP IC800SSI104RS1

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AllenBradley2711-T6C9L1/A2711T6C9L1

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SICK OPTIC ELECTRONIC CLV-490-3010 USPP CLV4903010

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Square D 8009 RT8

Norb Networks DS1404036-E5 8-Port 1 Gbps Gigabit Ethernet Interface Module

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SIEMENS 6ES7212-1BB21-0XB0 CPU 222

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Reliance 57516

Schneider Modicon Gould AS-B230-501 Output Module ASB230501

Schneider Modicon AS-B356-000 USPP ASB356000

Schneider Modicon AS-S908-120 USPP ASS908120

Schneider Modicon AS-B885-111/ASB885111 Motion Module CLEAN OFFERS ACCEPTED

Schneider Modicon AS-B807-132 ASB807132 32 Point 120VAC Input NIB

MODICON ASB840108 OUTPUT MODULE REP

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Advantech PCL-745 Rev.a2 Isolated RS-422/485

Allen-Bradley 1769-OB16 Compact I/O Output Module

ABB Bailey IMCOM03 PS00PD Enhanced Controller XLNT

Adept Six 300 With PA4 amp, CIP 2, Teach pendant, Never put into production

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HONEYWELL 51401052-100 USPP 51401052100

TAYLOR ELECTRONICS 6202NZ10000C USPP 6202NZ10000C

CUTLER HAMMER W201K6CF USPP W201K6CF

CONTROL TECHNIQUES DXA-430 USPP DXA430

OMRON F150-C10E NSPP F150C10E

MODICON 140-MSB-101-00 USPP 140MSB10100

GENERAL ELECTRIC DS3800HXRB1D1D USPP DS3800HXRB1D1D

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Keyence KV-L20R Serial Interface Module

YASKAWA ELECTRIC JAMSC-C8130 USPP JAMSCC8130

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Siemens OP27 6AV3627-1LK00-1AX0 Membrane Keypad

RCA 505-7201

Schneider Modicon AS-B828-016 ASB828016 5VDC TTL Output NIB

Schneider Modicon AS-5B41006A USPP AS5B41006A

Schneider Modicon AS-M909-001 USPP ASM909001

Schneider Modicon AS-B132-000 NSPP ASB132000

Schneider Modicon Analog Multiplexer Voltage AS-B846-001 11281

ModiconSchneider554VIC15739554VIC15739PANEL

SIEMENS SIMATIC U-55N 9310 INPUT MODULE 24 V DC

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Advantech PCL-743B REV.A1 RS-232/485 ISA Card

ALLEN-BRADLEY 2711-NC1 PanelView Connector Cable

ABB 57275847 USART86-INT Allen Bradley Stromberg 200042

ACME ELECTRIC TP533143S Transber, 208Y/120V, 75kVA - A G2

AALLEN BRADLEY 1336 AC Drive 1336-B030-EDF-L3 30HP

8500-B1D-K1B ALLEN BRADLEY SERVO MOTORS REMANUFACTURED

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INDRAMAT HDS03.2-W075N-H3 NSPP HDS032W075NH3

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STI F3SN-A1207P25L USPP F3SNA1207P25L

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SIEMENS 6ES5 464-8ME11 ANALOG INPUT MODULE

SIEMENS 6ES5454-4UA12 6ES54544UA12 Output

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ProSoft MVI46-PDPS PROFIBUS DP-V0 Slave Communication Module for SLC 500

HILSCHER CIF-50-PB COMMUNICATION MODULE INTERFACE CIF50PB

Veeder Root PLLD Interface Module Board 330886-002 for TLS-350

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Omron 3G2A4-BL021

Schneider Modicon AS-S908-110/ASS908110

Schneider Modicon AS-B875-001 INPUT MODULE ANALOG 4-20MA 8POINT W/CONN AR 800

Schneider Modicon AS-E908-131 NSFP ASE908131

Schneider Modicon GOULD OUTPUT MODULE AS-B804-016 ASB804016

Schneider Modicon AS-B885-002 COMMUNICATION MODULE ASB885002

Schneider Modicon Power Supply M AS-P120-000 ~SEALED NIB SURPLUS~

SEEK ELECTRONICS AS-8550SX I/O TERMINAL UNIT

Schneider Telemecanique ATV31 CPU Board

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GE Fanuc IC630CCM300A Data Communications Module

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ALLEN-BRADLEY MICROLOGIX 1200 1762-OF4 4 CH. ANALOG OUTPUT MODULE SER QUANTITY

AB Allen Bradley 1395 75 HP DC Motor Controller / Drive

AC Electric Motor Drive - 60 HP - 600 Volt - Three Phase Input

A06B-0502-B001 FANUC SERVO MOTORS REMANUFACTURED

75 HP Rotary Phase Converter with DIGITAL Control and Starter

RELIANCE ELECTRIC 803612-SE USPP 803612SE

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ALLEN BRADLEY 1774-LP1 USPP 1774LP1

INDRAMAT 268613 USPP 268613

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Texas Instruments 500-5035

Square D 8030 CRM255 SY/Max Interface Module in Box Sealed

uPLC01 PLC with CANopen DeviceNet EtherNet/IP Modbus

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Modicon AS-W808-002

Schneider Modicon AS-BDAP-208 IN A BOX

Schneider Modicon DAP 218/AS-BDAP-218 042701664 Output Module

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Schneider Modicon /Gould AS-P453-621 Remote I/O Module (UVG)

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Schneider TSXAEY420 Analog Input Module TSX Premium no Box

Redback FE2 Forwarding Engine for SMS 1800 FE2-1K-48

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ALLENBRADLEY1746-NO8IANALOGOUTPUTMODULE1746NO8I1746-N08I

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A06B-0143-B084#7008 FANUC SERVO MOTORS REMANUFACTURED

0020-27275 CLAMP RING,COH Ti/TiN POISON HI-PWR,SNNF

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GENERAL ELECTRIC 193X379AEG01 USPP 193X379AEG01

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Siemens Simatic S5 6ES5 340-3KB31 6ES53403KB31

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Siemens GSM Modem TC35i

SATT CONTROL 492-705-502 USPP 492705502