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DCS 的维护可分为：日常维护;预防性维护和故障维护，日常维护和预防维护是在系统未发生故障所进行的维护。故障维护发生在故障产生之后,往往 已造成系统部分功能失灵并对生产造成不良影响;相反,预防性维护是在系统正常运行时,对系统进行有计划的定期维护,及时掌握系统运行状态、消除系统故障隐 患、保证系统长期稳定可靠地运行,形成定期维护的概念。实践证明,定期维护能够有效地防止DCS 突发故障的产生,形成可观的间接经济效益。
　　DCS 系统的日常维护
　　系统的日常维护是DCS系统稳定高效运行的基础，主要的维护工作有以下几点：
　　1) 完善DCS系统管理制度。
　　2) 保证空调设备稳定运行,保证室温变化小于±5℃/h ,避免由于温度、湿度急剧变化导致在系统设备上的凝露。
　　3) 尽量避免电磁场对系统的干扰,避免移动运行中的操作站、显示器等,避免拉动或碰伤设备连接电缆和通讯电缆等。
　　4) 注意防尘，现场与控制室合理隔离，并定时清扫，保持清洁，防止粉尘对元件运行及散热产生不良影响;
　　5) 严禁使用非正版软件和安装与系统无关软件。
　　6) 做好控制子目录文件的备份,各自控回路的PID 参数、调节器正反作用等系统数据记录工作。
　　7) 检查控制主机、显示器、鼠标、键盘等硬件是否完好,实时监控工作是否正常。
　　8) 查看故障诊断画面,是否有故障提示。
　　预防维护
　　有计划地进行主动性、预防性维护,保证系统运行稳定可靠。根据大修周期，利用大修进行一次预防性的维护，以掌握系统运行状态,消除故障隐患。大修期间对DCS 系统应进行彻底、全面的维护，内容包括：
　　1) 系统冗余测试: 对冗余电源、服务器、控制器、通讯网络进行冗余测试。操作站、控制站停电检修。包括计算机内部、控制站机笼、电源箱等部件的灰尘清理。
　　2) 系统供电线路检修。并对UPS进行供电能力测试和实施放电操作。
　　3) 接地系统检修。包括端子检查、对接地电阻测试。
　　大修后系统维护负责人应确认条件具备方可上电，并应严格遵照上电步骤进行。

SIEMENS 6SN1145-1BA00-0DA0 USPP 6SN11451BA000DA0

GE FUJI 6KP1123060X9B1 NSFP 6KP1123060X9B1

CONTROL TECHNIQUES DXE-4120CB USPP DXE4120CB

GENERAL ELECTRIC DS3800HSQD1G1D USPP DS3800HSQD1G1D

TEXAS INSTRUMENTS PLC 530-1102 NSFP 5301102

STI MS4460X NSPP MS4460X

DYNACORP 307141-28 NSFP 30714128

Siemens 6ES5 955-3LF42 6ES59553LF42

SIEMENS 6ES5 102-8MA02 6ES51028MA02

SIEMENS 6ES5-777-0BC00/6ES5777-0BC00 BUS TERMINAL XLNT

Siemens 6ES5 700-2LA11 /6ES5700-2LA11 7-SLOT RACK W/TERMINATOR XLNT

SIEMENS 6DS1222-8BA 6DS12228BA

Siemens LOGO! 230RC 6ED1 052-1FB00-0BA5 6ED10521FB000BA5

ROBOTRON 503-1-0324-17 USPP 5031032417

Telemecanique TSXDST2472

SIEMENS TI PLC 6MT33 LOGIC INTERFACE MODULE I/O S7 S5

Wago 750-460 4-CHANNEL ANALOG INPUT MODULE

Siemens 7SJ6415-5EB21-1FE0/EE

Modicon AS-S902-111

Schneider Modicon DAP216N AS-BDAP-216N INPUT MODULE 65

Schneider Modicon AEG/GOULD// AS-P464-000 MONITOR W/KEYBOARD KEY LOCK XLNT

Schneider Modicon AS-B875-111 USPP ASB875111

Schneider Modicon AS-8534-000 AS8534000 G309

Schneider Modicon MODEL AS-B804-016

Schneider Modicon AS-M84A-002 Controller Module 64-Bit WOW

Schneider Automation Inc 140 DRA 840 00 140DRA84000 Output Module Sealed

SIEMENS 505-4216 INPUT MODULE 5054216

RELIANCE ELECTRIC 57C-433 NSFP 57C433

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PHOENIX MCR-C-UI/UI-DCI COMMUNICATION INTERFACE MODULE

SIEMENS SERVO DRIVE 6SN1113-1AB01-OBA1

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SIEMENS 24VDC DMP COMPACT INPUT MODULE 6FC5111-0CA01-0AA0

AllenBradley1791-OB16/BBlockI/OOutputModule

Allen Bradley Solid State Timer Relay 700-RTC00000U1 WARRANTY

ABB MEM86-192K + 192KRM

ZINSCO 3034215HM 300 kVa 480 240 60HZ 3P transformer

(V7) 1 GENERAL ELECTRIC 16L0076WH3 CAPACITOR V7

MODICON 140-CPU-434-12 USPP 140CPU43412

ALLEN BRADLEY 1392-A040-RA-MC USPP 1392A040RAMC

GENERAL ELECTRIC DS3815PMMA1F1B USPP DS3815PMMA1F1B

FOXBORO 220S-2F6 USPP 220S2F6

SIEMENS 6ES7-647-2CE10-1CX1 NSFP 6ES76472CE101CX1

SCHRADER BELLOWS 008-4934 NSPP 0084934

WESTINGHOUSE A201K4CA-J1 USPP A201K4CAJ1

Siemens 6ES5 535-3MA12 6ES55353MA12

Siemens DIGITAL OUTPUT SIMATIC S5 6ES5-451-8MD11

SIEMENS 6ES5-454-7LA11 MODULE 6ES54547LA11

Siemens 6ES5 391-5AA13 Operating Control Panel 11207

Siemens S5 Memory SubModule 6ES5 372-0AA61 NIB

Siemens Controller RDE10.1 NIB

Shuttle X50V3 15.6" Atom D2700 GMA3650 DDR3-1600 Gigabit All-In-One System

Square D 8030 HOM-222

Ser.A

WE SHIP SAME WS-CAC-3000W CISCO CAT. 6500 SER. 3000W AC POWER SUPPLY

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Schneider Modicon Square D AS42CM-T PowerLink Control Modules

Schneider Modicon AS-BMOT-201 Compact Motion Encoder ASBMOT201

Schneider Modicon AS-B802-000 USPP ASB802000

Schneider Modicon PROGRAMMABLE CONTROLLER AS-584L-231 115V

Schneider Modicon AS-J810-000 Remote I/O Adapter

Schneider Modicon AS-B872-100 Analog Current Output ASB872100

SchneiderTSXDSY16T2PremiumSourceOutputModule

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Siemens HMI 6AV6 647-0AB11-3AX0 NIB 6AV66470AB113AX0

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SIEMENS 6SE70900XX840FK0 SIMOVERT MDMC COMMUNICATIONS MODULE XLNT

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SIEMENS 6SN1123-1AA00-0BA1 Version A Simodrive LT-Modul Int 25A Card Module

SIEMENS 6FC5-203-0AC00-1AA0/6FC5203-0AC00-1AA0 NIB

AllenBradleyPanelviewPlusLogicModule2711P-T7C4D1/A2711PT7C4D1

Allen-Bradley - 1794-TB3S

ABB DCS 401 0610 2 REV A 610 AMPS 500HP DRIVE PN: 401.0610.2

Adept Technology 10310-70200 | 12mo | Free EU ping | Inc UK VAT

(6) KEITHLEY 7703 DIFFERENTIAL MODULE CARD

INDRAMAT MDD112D-N-030-N2M-130PB1 USPP MDD112DN030N2M11

VIBRO METER CMC16 USPP CMC16

FANUC A06B-6057-H007 USPP A06B6057H007

DYNAMATIC 15-580-10 USPP 1558010

RELIANCE ELECTRIC 57C-440A USPP 57C440A

NEMATRON CORP ICC-5000-PC1 USPP ICC5000PC1

MODICON AS-516P-002 USPP AS516P002

Siemens 6ES5 417-7AA21 6ES54177AA21

Siemens 6ES5-864-0MA04 NSFP 6ES58640MA04

SIEMENS 6ES5-377-0AB41 USPP 6ES53770AB41

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Siemens S5 6ES5 095-8MA03 6ES50958MA03

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SIEMENS VS710 Vision Sensor 6GF1710-2AA

Siemens 6SN1118-1NH01-0AA0

Mitel Fiber Interface Module FIM 9400-300-301-NA

WS-X6708-10G-3C Cisco 8-Port 10 Gigabit EN Module with DFC3C module 8 ports

Siemens 6ES7 332-5HD01-0AB0 6ES73325HD010AB0 NIB

SIEMENS PLC EEPROM 6ES5 374-0AB11 6ES53740AB11

Reliance 0-55304

Schneider Modicon AC POWER CONVERTER MODEL AS-P120-000

Schneider Modicon AS-B233-501 USPP ASB233501

Schneider Modicon AS-P890-300 NSPP ASP890300

Schneider Modicon AS-B810-008-11 Slot Good Condition

Schneider Modicon AS-B373 Analog Input Module WOW

MODICON OUTPUT MODULE B243-110 NICE

SIEMENS SIMATIC 6ES5434-4UA11 INPUT MODULE 32 POINT

Siemens 6ES7 133-0BH10-0XB0 193-0CA30-0XA0 ET200B S5/S7

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SIEMENS 6DD1661-0AB0 COMMUNICATION MODULE

SIEMENS SINUMERIK 6FC3551-1AC-Z 6FX1151-1BD00 6FX1138-5BB04 6FX1128-1BA00 COMPLETE SET

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SIEMENS Simodrive 6SC6100-0NA21

SIEMENS 802S 6FC5500-0AA00-1AA0 Membrane Keypad 6FC5 500-0AA00-1AA0

Advantech AIMB-742VE Main Board AIMB-742 Rev.A2 FreShip

ALLEN-BRADLEY 1771-OWNA CONTACT OUTPUT MODULE 1771-0WNA

ABB ACS550-U1-038A-4 ACS550U1038A4

ACTUS POWER pfb-10 supply pfb10 nikki denso

6ES7431-7KF00-0AB0 Brand , Factory Sealed,

900' 350 MCM 350MCM slippery rock Aluminum URD wire 600 volt cable

SQUARE D CF2308G10STM NSPP CF2308G10STM

CAMCO LS14X80 USPP LS14X80

BARBER COLMAN 80BE-00036-201-V-00 USPP 80BE00036201V00

MODICON MM-PMMP-000 USPP MMPMMP000

LANDIS & GYR 549-610 NSPP 549610

DELTAV 12P1442X032 NSFP 12P1442X032

Siemens 6ES5 095-8MD02 6ES50958MD02

Siemens 6ES5-464-8MB11 NSFP 6ES54648MB11

SIEMENS 6ES5 941-7UA12 CPU

SIEMENS S5 6ES5 IP243 243 1AA12 with 491 0LB11

Siemens Subrack CR2 6ES5 700-2LA11

Siemens 6ES7315-2EH14-0AB0 CPU in Box

SIEMENS SIMOREG 6RA23 C98043-A1663-L41-08

Siemens 6ES5256-3AA21

HP/Agilent 81533B Interface module for 8153A

XpressKIT Interface and Bypass Modules from Directed Electronics PLJX

SIEMENS 6ES5-240-1AA11 6ES52401AA11

Siemens MOBIC T8 6GK1611-0TA01-0AV0 Display Panel

Omron CJ1W-SRM21

Schneider Modicon AS-BDEP-210/ASBDEP210

Schneider Modicon AS-212P-220 NSPP AS212P220

Schneider Modicon AS-J830-001 MODULE INTERFACE 884/800 ASCII

Schneider Modicon AS-506P-F12 CNC Memory Board Rev C23 (UVG)

Schneider Modicon DEP218/AS-BDEP-218

Schneider Modicon /Schneider AS-B865-001/ASB865001 NICE

SIMATIC S7 Analog Input ModuleTC 6ES7 331-7PF10-0AB0

Schneider TSX08ED12R8 Telemecanique MODICON in Box

Siemens TB16 SC Terminal block 6ES7120-0AH00-0AA0

Siemens 505-4816 AC Output Module

SIEMENS Sinumerik 802S 802C Mechanical Keypad 2 month warranty

DEES COMMUNICATIONS 8 TRUNK MODEL 154 POWERFAIL BYPASS MODULE

SIEMENS Simodrive Drive 6SN1130-1AA11-0AA0 A

SIEMENS SIMODRIVE 6SN1145-1BA01-0AA1SINUMETIK 840D NCU-BOX 6FC52476FC5356 2BO

Advantech AIMB-740VE AIMB-740 B1

ALLEN-BRADLEY 700-P800A-1 RELAY 8NO 120VAC 10AMP XLNT

ABB 3BSE018168R1 AC 800M Processor PM851 K01 PM851K01

ACCURAY 064895-001 USPP 064895001

A06B-6079-H204 FANUC SERVO AMPLIFIER

800KW PORTABLE RESISTIVE LOADBANK TO MOST WORLDPORTS, 400-1000KW SIZES AVAILABLE

SIEMENS 6DD1-640-0AC0 USPP 6DD16400AC0

ALLEN BRADLEY SA3100-B025-AA-L6R USPP SA3100B025AAL6R

ALLEN BRADLEY 6181-ABBCBCZZZ USPP 6181ABBCBCZZZ

KNOLL AMERICA INC KTS-32-64-T5-A-KB USPP KTS3264T5AKB

GIDDINGS & LEWIS 401-34403-00 NSFP 4013440300

YOKOGAWA 230212-AHE-2 NSFP 230212AHE2

ORMEC SAC-D08L/I USPP SACD08LI

Siemens 6ES5-318-3UA11 USPP 6ES53183UA11

SIEMENS 6ES5 435-7LA11 6ES54357LA11

SIEMENS S5 6ES5 752-0AA12 6ES5752-0AA12 6ES57520AA12

Siemens Interface Module 6ES5 305-7LA11 38062

Siemens 6ES7 223-1PH20-0XA0 6ES7223-1PH20-0XA0

Siemens OP37 6AV3637-1ML00-0FX0 Membrane Keypad ping Worldwide

QUANTITY OF 10 NETERION X3100 10GBPS ETHERNET NETWORK ADAPTER

Genuine Cisco WIC-1ADSL Interface Module For 1721 1760 2600 2600XM 2691

TEXAS INSTRUMENTS TI 500-5038 NETWORK INTERFACE MODULE

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Siemens EPROM 6ES5375-0LA21 6ES5 375-0LA21

Modicon PC-A984-130

Schneider Modicon Groupe AS-BDEP-210 ASBDEP210

Schneider Modicon AS-BDEP-220 BRAND Guaranteed Discreet Input ASBDEP220

Schneider Modicon AS-C921-000 NSFP ASC921000

Schneider Modicon AS-M84A-002

Schneider Modicon AS-B840-108 ASB840108

Schneider Modicon MEMORY CPU AS-S480-207 S480-200 ASS480207

Schneider Telemecanique XBT NU400 XBTNU400

SCHNEIDER 140DAI55300 TSX QUANTUM 140-DAI-553-00 in Box

PROTECH PIRAMID SDI-77XL PASSIVE INFRARED DETECTOR

SIEMENS 6ES5 470-8MC12 ANALOG OUTPUT MODULE

SIEMENS 6DD1-684-0DC0/6DD1684-0DC0/465 684 9032.00 PSV/ATV CABLE NIB

IBM 11F4814 Communication Controller Module Modem

SIEMENS SIMODRIVE 6SN1145-1BA01-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC5356 #2ZH

SIEMENS SINUMERIK 820 T 6FC3261-1AC-Z CONTROL PANEL 5703029301.00 TESTED

SIEMENS MOORE PRODUCT VALVE 73N-FR B/M 10637-/14MC

Allen-Bradley PanelView 900 2711-K9C3 Series C Revision B WARRANTY

54645D Mixed Signal Oscilloscope, all Accessories, Calibrated, 30

ABB Soft Starter PST300-600-70

A06B-0153-B075#7008 FANUC SERVO MOTORS REMANUFACTURED

705330-325

RELIANCE ELECTRIC 0-52842 NSFP 052842

ALLEN BRADLEY 1785-L20E/E NSFP 1785L20EE

ALLEN BRADLEY 1336Z-SB017-N NSFP 1336ZSB017N

GENERAL ELECTRIC DS3800NHVE1C1C USPP DS3800NHVE1C1C

THOMSON INDUSTRIES 2DB16-JOBGX84 NSFP 2DB16JOBGX84

SUN MICROSYSTEMS T9840C USPP T9840C

FANUC A06B-0227-B005 USPP A06B0227B005

Siemens 6ES5-095-8MA05 CPU Module

SIEMENS 6ES5 308-3UA12 6ES5308-3UA12 Serial Interface EPROM 16kB CASING

SIEMENS 6ES5-911-0AA42 USPP 6ES59110AA42

Siemens 6ES5 701-1LA12 6ES5 701-1LA12S5 ER 701-1 9-Slot Expansion Rack

SIEMENS 6ED1 052-1CC00-0BA4 ping

SIEMENS LOGO! 6ED1 052-1HA00-0BA0 24R

RME HAMMERFALL HDSP 9632 AUDIO INTERFACE SOUND CARD

Telemecanique VW3A28100

SIMATIC S7 6ES71511BA020AB0 6ES7 151-1BA02-0AB0

Wago 750-315 MODBUS FIELDBUS COUPLER

Siemens Basic Operator Panel BOP20 6SL3055-0AA00-4BA0

Modicon AS-T211-001

Schneider Modicon Automation Power Supply AS-P120-000 2869

Schneider Modicon AEG/GOULD// AS-B806-032/AS-8713-000 OUTPUT MODULE 120VAC XLNT

Schneider Modicon AS-B883-101 Free Ship

Schneider Modicon AS-984A-832 MODULE 1 YR WARR OBSOLETE

Schneider Modicon Output Module AS-BDAP-210 BDAP 210

Schneider Modicon AS-P120-000/ASP120000 Power Supply SEALED

SCHNEIDER AUTOMATION 8-POINT OUTPUT MODULE TSX-DST-882 TSXDST882

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RELIANCE ELECTRIC 45C-200 USPP 45C200