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DCS 的維護可分為：日常維護;預(yù)防性維護和故障維護，日常維護和預(yù)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(yù)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(chǔ)，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(shè)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(dǎo)致在系統(tǒng)設(shè)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(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(yù)防維護
　　有計劃地進行主動性、預(yù)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(yù)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(yīng)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(wù)器、控制器、通訊網(wǎng)絡(luò)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(zé)人應(yīng)確認條件具備方可上電，并應(yīng)嚴格遵照上電步驟進行。

Siemens 6ES5451-8MA11

RV Monaco DC interface module 38030033 dci bus motorhom

Watt Stopper HBMS8SS BMS Interface Module for LI Lighting Integrator Automation

SIEMENS 6ES7 222-1HF32-0XA0 6ES7222-1HF32-0XA0 FreeShip

Siemens TP270 6AV6 545-0CC10-0AX0 Touchscreen Glass

Reliance 0-51817

Schneider Modicon ASB875111 Analog Input Module AS-B875-111

Schneider Modicon AS-B352-000 NSFP ASB352000

Schneider Modicon AS-BSIM-203 USPP ASBSIM203

Schneider Modicon AS-C484-600

Schneider Modicon AS-BDAP-210 TSX OUTPUT MODULE NIB

Schneider Modicon I/O HOUSING AS-H8190199 ~ NS

SCHNEIDER Telemecanique Switch XB4 BVB1

Schneider Automation Inc 140 DDI 841 00 140DDI84100 Input Module Sealed

PWR-4000-DC 4000W DC POWER SUPPLY FOR CATALYST 6500/7600 1YR - ASK 4 Q

SIEMENS 6ES5-441-8MA11 PLC OUTPUT MODULE ""

SIEMENS 6DD1641-0AC0 EB11 DIGITAL I/O MODULE IN BOX

Lenze EMF2102IBCV003 Lecom-LI Communication Module EMF2102IBC-V003

SIEMENS Simodrive 6SN1130-1AA11-0BA0

SIEMENS SINUMERIK 840C NC CPU 6FC5110-0BB01-0AA2

SIEMENS Moore XTC Transmitter-Controller 340DBBSAAB NN213

ALLEN-BRADLEY SLC 500 1746-OB8 OUTPUT MODULE QUANTITY

ALLEN BRADLEY RIGHT HAND DOOR HARDWARE KIT 1494V-L3

ABB SACE PR231/P W/ BK15494 P4KLAM04006 OUT OF

A06B-0148-B175#0076 FANUC SERVO MOTORS REMANUFACTURED

7 Digiboard DBI A/N30000354 Full size I/O ISA card

PACIFIC SCIENTIFIC SC755A001-01 USPP SC755A00101

ALLEN BRADLEY 1771-NT1 FNFP 1771NT1

ALLEN BRADLEY 1336S-B010-AN-EN-GM1-L4 USPP 1336SB010ANENGM1

GENERAL ELECTRIC DS215SLCCG2AZZ01B NSPP DS215SLCCG2AZZ0B

TELEMECANIQUE ATV-66D23-N4 USPP ATV66D23N4

SQUARE D LC-26600AC USPP LC26600AC

CUTLER HAMMER AGSCH120N030040 NSFP AGSCH120N030040

Siemens 6ES5 951-7NB21 -- 6ES59517NB21

SIEMENS 6ES5-752-0AA23/6ES5752-0AA23 INTERFACE MODULE NIB

Siemens 6ES5 498-1AA41 USPP 6ES54981AA41

Siemens 6AV6642-0DA01-1AX1 OP177B No Box

Siemens LOGO 6ED1 055-1CB00-0BA0 in sealed box

RPS MKS ASTRON AX7685 GENERATOR

Telemecanique TSX1723428

Siemens Simatic 6ES7 151-1AA05-0AB0 6ES71511AA050AB0 Interface Module

Wago 750-478 2-CHANNEL ANALOG INPUT MODULE

SIEMENS 6SL3211-0KB13-7UA0 0.37KW 220V

Modicon AS-P801-001

Schneider Modicon DTA 200/AS-HDTA-200 DTA200ASHDTA200 Primary Subrack

Schneider Modicon ASB232501 Output Module AS-B232-501

Schneider Modicon AS-B875-011 8CH Analog Module ASB875011

Schneider Modicon AS-W922-015 GENERIC OEM CABLE ASW922015

Schneider Modicon Gould AS-C484-266 484 Controller Programmable

Schneider Modicon AS-J892-001 Communication Module ASCII 984/800 RI/O INTERFACE

SCHNEIDER AUTOMATION PM+ 1000 MODBUS PLUS INTERFACE NNB

SIEMENS 505-4332 MODULE DIGITAL INPUT 505 32IN 14-30VDC 5054332

RELIANCE ELECTRIC I/O PROCESSOR MODULE 45C200A

SIEMENS 7MH71561AA001AA MILLTRONICS SF500 INTERFACE NIB

SIEMENS SINUMERIK OP 032 6FC5203-0AB20-0AA1 NIB

Prosoft MVI56-ADM 'C' Communications Module MVI56DAM

SIEMENS Parameter Circuit Board 6SN1114-0AA01-0AA0

SIEMENS SIMODRIVE 6SN1145-1BA01-0BA1SINUMETIK 840D 6FC5247-0AA00-0AA26SN1123

SIEMENS 6FC3521-0AC-Z USPP 6FC35210ACZ

ALLENBRADLEY2706E43J128B1OPERATORINTERFACEDATA

Allen Bradley Terminal Board 9101-1779 Amphenol Connector /Sealed

ABB K - Line K-600S 600V 600A LI AIR CIRCUIT BREAKER

Zehnb 850 incircuit Test System Zehnb 810 ICT sold for parts

(SIEMENS) WARM BOOT 3RW4444-6BC44 good in condition for industry use

MITSUBISHI FRSX2-18.5K USPP FRSX2185K

ALLEN BRADLEY 1336VT-B050-EAS-FA2-L1 USPP 1336VTB050EASFA2

GENERAL ELECTRIC 6KDV3400Q2B20 NSFP 6KDV3400Q2B20

FLEXMATE INC 3-USP-G02 USPP 3USPG02

SIEMENS 6ES5-927-3SA12 USPP 6ES59273SA12

REXROTH DM-15K-1101-D USPP DM15K1101D

TOLEDO SCALE 4100PA NSFP 4100PA

Siemens 6ES5 524-3UA15 6ES55243UA15

Siemens 6FM1470-4AA25 6FM14704AA25 S5 w/ 6ES5 373-1AA81

SIEMENS 6ES5-451-8MD11 USPP 6ES54518MD11

Siemens 6ES5 375-0LA11 USPP 6ES53750LA11

Siemens S5 DIN RAIL MOUNTS INCLU 6ES5 710-8MA41

Siemens CABLE 6ES7 901-0BF00-0AA0 HMI MPI to S7-300

Siemens 6ES5 420-4UA14 -FS- 6ES54204UA14

Square D 8030 DLM-120

SCHNEIDER TELEMECANIQUE OTB1E0DM9LP ETHERNET INTERFACE MODULE FREE SHIP

WiredWIFIIndoorAudioSDRemote RecordiPhoneiPad

Siemens 6ES7953-8LG20-0AA0 128K MMC Card in Box ping

Siemens TP170A 6AV6 545-0BA15-2AX0 LCD Display 90%

Sick 7023059

Schneider Modicon ASH810208 PERFECT 800 Series Rack AS-H810-208

Schneider Modicon AS-B573-010 INPUT MODULE REPAIRED

Schneider Modicon Controller AS-J878-100

Schneider Modicon AS-H827-209 11-Slot PLC Module Rack Chassis 984

Schneider Modicon AS-B846-001 ANALOG MULTIPLEXER

Modicon 1646-4 Computer Interface Modem

Siemens 6ES7-332-5HB01-0AB0 Input Module Analog

SCHNEIDER MODICON 140CPU43412U 140 CPU 434 12U TSX Quantum

SIEMENS MC S85 OPERATOR PANEL 853 362 GOOD TAKEOUT

SIEMENS Sinumerik 6FX1118-4AB01. I/O Interface Mod .

Siemens Simatic 6ES5525-3UA11 Communication Module

SIEMENS 6SN1123-1AA00-0HA1 Power Supply Module 8 Amp AS-IS

SIEMENS 6SN1123-1AB00-0AA1 SIMODRIVE LT-MODUL INT. 2X15A WORKING VERY CLEAN

SIEMENS 6FC5-210-0DA20-2AA1 MAIN MEMORY CONTROL UNIT MMC 103. 32MB DRAM

AllenBradleySLC500OutputModule1746-OW16SeriesA

Allen-Bradley 1 Pair AC Output Modules 2755-OA5S

ABB CIRCUIT BREAKER S5H 400 AMP 3P # S5H400EWS4 803NW

ADEPT TECH 90332-48050 NSFP 9033248050

(4459) Allen Bradley Industrial Computer 6181-CIBBBBZZZ (4459)

INDRAMAT MAC112A-0-VD-3-C/130-A-1 USPP MAC112A0VD3C130A

TOSHIBA VT130G2-4400 USPP VT130G24400

FANUC A06B-6044-H008 USPP A06B6044H008

DANFOSS 175L2045 USPP 175L2045

RELIANCE ELECTRIC 419003-R NSPP 419003R

NACHI F2C-T355-ZB25-94 USPP F2CT355ZB2594

MEASUREX 052940-00 USPP 05294000

Siemens 6ES5 377-0BB41 6ES53770BB41

Siemens 6ES5-752-0LA22 NSPP 6ES57520LA22

SIEMENS 6ES5-376-0AA31 USPP 6ES53760AA31

Siemens 6ES5 385-8MB11 6ES53858MB11 High Speed Counter

Siemens PG 615 Programmer 6ES5 615-0UA11 WOW

Siemens 6SE7014-0TP50-Z NIB

Siemens TP7 6AV3607-1NH00-0AX0 Touch Panel

Siemens 6SA8110-2BC00

METTLER TOLEDO B90074000A SERIAL INTERFACE MODULE NNB

XENPAK-10GB-SR 10GBASE-SR MODULE FOR CISCO

Siemens 6ES7 314-6BF00-0AB0 6ES7314-6BF00-0AB0 FreeShip

Siemens PLC 6ES7 216-2AD23-0XB0 6ES7216-2AD23-0XB0

Reliance 0-52003

Schneider Modicon AS-9534-002/AS9534002 7 Slot Chassis Rack

Schneider Modicon AS-B225-000 USPP ASB225000

Schneider Modicon AS-P800-003 NICE

Schneider Modicon AS-B805-016 OUTPUT MODULE ASB805016

Schneider Modicon AS-B275-501 10-60 VDC INPUT MODULE GOOD TAKEOUT

Modicon PanelMate Plus MM-PM10300C 92-01685-00 WOW

Siemens Simatic Input Module S7-400 6ES7431-1KF20-0AB0 QTY

Siemens 6ES7 322-1EH01-0AA0 -FS- 6ES73221EH010AA0

Siemens Simatic 6ES7 322-1BF01-0AA0 Output Module

SIEMENS 6DD1611-0AF0 NSFP 6DD16110AF0

SIEMENS Sinumerik System 800 6FC3988-7AF01 9 inch monitor

SIEMENS OFFER & WIN SIMODRIVE 6SN1130-1DB42-0CA0 VSA-MODUL

SIEMENS Simodrive 6SC9811-4CH00 TAKE-OUT Listed Elsewhere for $2460.31

SIEMENS Circuit Board 6FC9310-1MB01 _ 6FC93101MB01 _ DO-L1348-1A01

ADb PROX-H471

Allen-Bradley 1785-BCM Output Module

ABB ACS 600 FREQUENCY DRIVE 250HP ACS60402605000B00009R1

Actus Power AC Servo Control Controller NPSA-5NN-55E1 _ NPSA5NN55E1

6ES7317-2FJ10-0AB0 6ES7317-2FK13-0AB0 Brand , Factory Sealed,

90 5 acceptance

SIEMENS PXD63B140H NSFP PXD63B140H

BOSCH 1070075543-101 USPP 1070075543101

BAILEY CONTROLS IMASI-13 USPP IMASI13

MODICON AS-P890-300 NSFP ASP890300

KAWASAKI 50607-1075R03 USPP 506071075R03

CONTROL TECHNIQUES DXA-202 USPP DXA202

Siemens 6ES5 095-8MA04 6ES50958MA04

Siemens 6ES5-458-7LA12 USPP 6ES54587LA12

SIEMENS 6ES5 777-0BC01 BUS TERM L1 W/2METER CABLE

SIEMENS S5 6ES5 470-8MA12 ANALOG CARD

Siemens S5Input Module 6ES5921-3WB14 E Stand F

Siemens 6ES7231-0HC21-0XA0 6ES72310HC210XA0 FreeShip

SIEMENS SIMATIC PANEL PC 870 PC870 6AV7 743-2AC00-0AA0 Membrane Keypad

Siemens 6AW5463-OAB

HP Agilent 54650A HP-IB Interface Module Oscilloscope 54620C 54616C 54615B 54610

WS-X6748-GE-TX Cisco Express Forwarding 720 Interface Module Switch 48 ports -

Siemens 6ES5 921-3UA12 6ES59213UA12 IN BOX

Siemens LOGO! TD text display 6ED1 055-4MH00-0BA0

Omron c200h-ps211

Schneider Modicon AS-BNUL-200 PLC

Schneider Modicon ANALOG OUTPUT MODULE #AS-B872-011

Schneider Modicon AS-J474-000 NSPP ASJ474000

Schneider Modicon 864 Register Output Module AS-B864-001

Schneider Modicon BXT201/AS-WBXT-201

Schneider Modicon /24VDC 16-Pt Input Mod AS-B825-016

SLC500 DC Sink Input Module AB 1746-IB32/C

Schneider Telemecanique XBTGT5330 Touchscreen Glass

SIEMENS TEXAS INSTRUMENTS U-05T 16 POINT RELAY PLC OUTPUT MODULE U05TS5-4-123

SIEMENS 6AC6-935-4DA13/6AC6935-4DA13 INDUSTRIAL MONITOR MODULE XLNT

SIEMENS SINUMERIK 6FX1138-6BB01 6FX11386BB01

Durant 58801-400 58801400 Communications Module -

SIEMENS Simodrive LT Module 8A

SIEMENS SIMODRIVE 6SN1145-1BA01-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC5357 2ZP

Adb PCI-7300A

Allen-Bradley 8000 MBA Module 905981-05 Rev A

ABB 20 HP ACH550-VDR-031A-4+F267 AC Drive w/ Bypass and Disconnect VFD

ACCU SORT 5400 USPP 5400

A06B-6066-H012 FANUC SERVO AMPLIFIER REMANUFACTURED

800 HP AC MOTOR 3/60/4160 VOLT 593 RPM 127 AMP

SIEMENS 3WN6231-0FC74-1FA1 USPP 3WN62310FC741FA1

ALLEN BRADLEY 8520-3S5A-BAT-EX4-S-1-2-3-5-7 USPP 85203S5ABATEX4S2

ALLEN BRADLEY 6155-RLYZGLCHGFZ USPP 6155RLYZGLCHGFZ

JOHNSON CONTROLS NU-DCM140-0 USPP NUDCM1400

GENERAL ELECTRIC DS3800NFCD1S1L USPP DS3800NFCD1S1L

YASKAWA ELECTRIC CIMR-F7U4018 USPP CIMRF7U4018

MODICON 140-CPS-114-20 USPP 140CPS11420

Siemens 6ES5-310-3AB11 NSPP 6ES53103AB11

SIEMENS 6ES5 430-8MB11 6ES54308MB11

SIEMENS S5 6ES5 458-4UA12 Relay Output Module

Siemens Digital Output Module 6ES5-451-8MA11 17038

SIEMENS 6ES7 222-1HF21-0XA0 6ES7222-1HF21-0XA0 FreeShip

Siemens OP277 6AV6643-0BA01-1AX0 Membrane Keypad

Ready bundle for WS-X6708-10G-3C 8 Cisco X2-10GB-ER

GE FANUC interface module ethernet smartstack 10baset IC300ETN100A

TEXAS INSTRUMENTS 500 5040 NETWORK INTERFACE Module

TSXASZ4Siemems 6SE5 942-7UB11 6SE5942-7UB11 115U CPU 942B

Siemens EM 222 6ES7 222-1BF22-0XA0 EM222 PLC

Modicon NW-BM85-000

Schneider Modicon AS-H827-103 800 Series 11-Slot I/O PLC Module Rack Chassis

Schneider Modicon AS-BDAP-250 Compact Combo ASBDAP250

Schneider Modicon AS-C484-005 USPP ASC484005

Schneider Modicon ASHDTA202 Compact 2 Slot Rack AS-HDTA-202

Schneider Modicon Input Module M AS-B805-016 ~ SURPLUS NIB

SCHNEIDER Telemecanique TSXDET1612 16-INPUT CARD NIB

SCHNEIDER AEG DAP208 INPUT MODULE 65

PVDM3-32 CISCO 32-CHANNEL HIGH-DENSITY VOICE AND VIDEO DSP MODULE

SIEMENS 6ES5441-4UA13 SIMATIC OUTPUT MODULE QUANTITY

SIEMENS 6DD1-671-0AB2 USPP 6DD16710AB2

JDSU FIREBERD 8000 Communication Analyzer with Diphase module

SIEMENS SIMODRIVE 6SN1145-1AA01-0AA1SINUMETIK 840D NCU-BOX 6FC5247-0AA00-0AA2

SIEMENS SINUMERIK 840C HARD DISK 6FC5147-0AA13-0AA1

SIEMENS MOORE PRODUCTS 15921-21 BOARD NNB

Allen-Bradley Programming Terminal 1201-HAP

520FCOD ALLEN BRADLEY 520F COD

ABB SAFT 187 CON 58122203, , 58122203,

A06B-0148-B184#0075 FANUC SERVO MOTORS REMANUFACTURED

700 HP Custom 8000 Induction Motor 440 Volts Item #8426

PERCEPTRON 912-0010 USPP 9120010

ALLEN BRADLEY 1775-MSD USPP 1775MSD