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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。

Telemecanique SCHNEIDER TSXDSZ32RS

Schneider Modicon TSX08ED12F8

RELEASE SuperMicro X9DR3-F Motherboard FULL MFR

Siemens OP27 6AV3627-1JK00-0AX0

SIEMENS SINUMERIK 810D/DE NCU 571.3 6FC5357-0BB11-0AE1 NIB

Unico 100-732 3 1007323 Communication Module 100-732.3 -

SIEMENS CONTROLLER CARD 6SN1121-0BA13-0AA0

SIEMENS SIMODRIVE 6SN1146-1AB00-0BA0

SIEMENS SIMODRIVE 6SN1145-1AA01-0AA1SINUMETIK 840D NCU-BOX 6FC52476FC53562ZE

Advantech MIC-3351

ALLEN-BRADLEY 2755-NB40 US WIRING BASE USE WITH:2755-SN3;SN5 OR SN8 NIB

ABB 3HAB-5386-1 Teach Pendant S4 IRB6400C

ACCURAY 086155-001 USPP 086155001

A06B-6127-H104 FANUC Servo Amp

809A23E ALLEN BRADLEY 809 A23E

SIEMENS 6ES5-925-3KA12 NSFP 6ES59253KA12

ASEA BROWN BOVERI 57088621 NSFP 57088621

ALLEN BRADLEY 8000-AFZ NSFP 8000AFZ

LEXIUM BPH1902N5AF2CA1 USPP BPH1902N5AF2CA1

HEIDENHAIN CORP 362-579-05 NSFP 36257905

ALLEN BRADLEY 1336-B005-EOD-L2 USPP 1336B005EODL2

RELIANCE ELECTRIC 0-52851 NSFP 052851

Siemens 6ES5-350-3KA41 USPP 6ES53503KA41

SIEMENS 6ES5 441-8MA11 6ES54418MA11

SIEMENS SIMATIC6ES5-460-4UA13

Siemens Mounting Rail 6ES5 710-OSA11 WARRANTY

Siemens 6ES7 253-1AA22-0XA0 6ES72531AA220XA0 in Box

SIEMENS OPM2 6SE3 290-0XX87-8BF0 OPERATOR INTERFACE

PWR-ME3750-AC CISCO METRO CATALYST 3750 AC POWER SUPPLY SPARE

GSI LUMONICS DSPLINK3 MODULEOPTRA 1-0929-4-0001INTERFACE BOARD 229.055.00

Trimble 39263 Lassen LP Low Power GPS Interface Module

Siemens 6AF7001-7DD 6AF70017DD in box

Siemens HMI TP170/OP170 to PC RS-232 Programming Cable

Modicon SW-AP5D-PDA

Schneider Modicon GOULD AS-B531-000 INPUT MODULE 5-28 VDC LACTCH

Schneider Modicon ASI646001 Interface Module AS-I646-001

Schneider Modicon AS-D908-120 NSFP ASD908120

Schneider Modicon AS-P892-000 REMOTE I/O PROCESSOR 1YRWRTY

Schneider Modicon AEG/ AS-DAP-209 Output Module

Schneider Modicon Module - AS-BDEP-210 - Excellent w/ 30 Day Warrantee

Schneider TM2DMM24DRF

Schneider Modicon 140CRA93100 in Box

PreSonus AudiioBox 44VSL 44 Audio Recording Computer Interface w Headphones

SIEMENS 6ES5 441-8MA11 24VDC OUTPUT MODULE IN BOX

SIEMENS 6FC5-247-0AA00-0AA2 PLC HOUSING 13 AMP 57 V SINUMERIK 840D

HONEYWELL 30750338-005 COMMUNICATION MODULE TDC 2000 PWA HIGHWAY

SIEMENS SIMODRIVE 6SN1146-1AB00-0BA1 6SN11461AB000BA1

SIEMENS SINUMERIK 802D KEY BOARD 6FC5603-0AC13-1AA0

SIEMENS Moore 15799-282-2 VME Adapter 157992822 N1

Allen-Bradley Panelview 1200 Operator Interface 2711-TC1X

578B Source Locking Counter up to 110 GHz 4 bands L K

ABB TYPE HXR 400L J8 MOTOR

A06B-0153-B088#7075 FANUC SERVO MOTORS REMANUFACTURED

740pcs GOULD 50%/50% 1x2 1550nm wavelength flattened coupler 45-13255-50-42430

RELIANCE ELECTRIC 3RA2015U USPP 3RA2015U

ALLEN BRADLEY 1785-L80C15 NSFP 1785L80C15

ALLEN BRADLEY 150-B24NBDB NSFP 150B24NBDB

GENERAL ELECTRIC TRPT USPP TRPT

TRICONEX 3700 USPP 3700

TAYLOR ELECTRONICS 6007BE10000B USPP 6007BE10000B

FOXBORO P0400DA USPP P0400DA

Siemens 6ES5-103-8MA03

SIEMENS 6ES5 373-1AA41 6ES53731AA41

SIEMENS 6ES5-942-7UA13 6ES5942-7UA13

Siemens 6ES5 750-2AA11 NSFP 6ES57502AA11

Siemens 6ES5 306 -7LA11 6ES5306 -7LA11

Siemens LOGO! DM8 230R 6ED1 055-1FB00-0BA1 Module

Rev 2.01 SuperMicro H8DAE-2 Bulk Pack MB Support Quad / Dual Core CPU

Texas Instruments 2587678-8005 ( B9508 )

Spirent Adtech 400308 AX/4000 ATM DS1/T1 Interface

VS-S2T-10G Cisco Catalyst 6500 Series Supervisor Engine 2T Control processor

Siemens C79451-A3276-B55

Modicon AS-T884-004

Schneider Modicon Automation DEP 218/AS-BDEP-218 DEP218ASBDEP218 Module -NO BOX

Schneider Modicon AS-J890-101 ASJ890101

Schneider Modicon AS-BADU-204 Analog Input Module ASBADU204

Schneider Modicon AS-B805-016 115VAC Input Module ASB805016

Schneider Modicon PLC MODULE AS-B827-032 24 VDC INPUT

Schneider Modicon AS-S212-210 REV A13 Control Board

Schneider Automation / Modicon PanelMate Plus MM-PM21400C WARRANTY

Sharp JW-31N JW31N Input Module

Reliance AutoMax SA 500 AC power module servo amplifier 615055-1S

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

Numatics DeviceNet 2004 Communication Module 239-1016

SIEMENS SIMODRIVE 611 6SN1113-1AA00-0CA0 NIB

SIEMENS Sinumerik Operator Control Panel 6FC3808-3EF21

SIEMENS HBM Z6FC3-50-SZ USPP Z6FC350SZ

ALLENBRADLEY1771OBDSERIESBOUTPUTMODULE

Allen Bradley SLC-500 Digital Contact Output Module 1746-OX8

ABB PHARPS32000000 POWER SUPPLY MODULES w/ ASSY. XP XPiQ Synergy Power F8-G2B3B6

YORK 371-01450-002 USPP 37101450002

Indramat ServoMotor MDD112C-N-030-N2M-130GB2 Motor

MODICON AS-584A-038 USPP AS584A038

ALLEN BRADLEY 1395-A61-C1-P10 NSFP 1395A61C1P10

GETTYS M238-YY0Y-3Y0Y-NR USPP M238YY0Y3Y0YNR

GE FANUC IC3600EPSS1 USPP IC3600EPSS1

SIEMENS 6SE3-215-8DB40 NSFP 6SE32158DB40

SIEMENS 6AP1161-4CE3-80AH0 USPP 6AP11614CE380AH0

ALLEN BRADLEY 1336F-BRF20-AN-EN-GMS1 USPP 1336FBRF20ANENGM

Siemens 6ES5 921-3WB13 6ES5921-3WB13 6ES5 921 6E S5921

Siemens S5 6ES5 943-7UB11 CPU943B Processor Module

SIEMENS 6ES5-470-8MC12 USPP 6ES54708MC12

Siemens 6ES5 430-7LA12/6ES54307LA12 FACTORY SEALED

Siemens S5 Subrack CR2 6ES5 700-2LA11

Siemens DCS Module 6DS1701-8AB IN Box, seal opened,

SCXI Accelerometer Input Modules NI SCXI-1531

Square D 8502 PF3.11

Siemens 6ES5308-3UA12 IM308A Interface Module 60 DAY WARRANTY/FREE

WE SHIP SAME CISCO WS-C3750G-24TS-S1U 3750G-24TS SWICTH 1YR

Siemens 6GK7-243-1GX00-0XE0 6GK7243-1GX00-0XE0 CP243-1 IT

Siemens TP177B 6AV6642-0BC01-1AX1 Touchscreen Glass

Schneider Modicon Xenar Xenon Radionar Photo and Film Lenses Dogs Borzoi

Schneider Modicon AS-BDAU-208 TESTED Analog Out ASBDAU208

Schneider Modicon AS-B809-016 USPP ASB809016

Schneider Modicon PLC MODULE AS-B838-032 24 VDC OUTPUT

Schneider Modicon AS-P120-000 POWER SUPPLY MODULE 115/230VAC

Schneider Modicon AS-BDAP 210 Discrete Output Module

Schneider/Modicon MM-PM21400C PanelMate Plus 2000C

SIEMENS 6ES7 321-1BH02-0AA0 -NO BOX SIMATIC S7 INPUT MODULE 6ES73211BH020AA0

Sans Digital EliteRAID ER316FDB Dual Fiber Channel SAN

SIEMENS E1020MB1100FCGP RENOVATION PANEL INDOOR ENCLOSURE 240V IN BOX

SIEMENS SINUMERIK 810 BOARD 6FX1120-7B

Siebe LCMA-116-0-0-1 Local Control Module Communication Board

SIEMENS 6SN1145-1BA02-0CA2 SIMODRIVE 611 6SN11451BA020CA2

SIEMENS 6SN1111-0AA01-1BA0 6SN1 111-0AA01-1BA0 SIMODRIVE 611 Line Filter 16A 5kW

SIEMENS 6FC5114-0AA02-0AA0 6FC51140AA020AA0 version E

ALLENBRADLEYMicroLogix1200OUTPUTMODULE1762-OB8A1762OB8SEALED

ALLEN BRADLEY X-160914 NSFP X160914

ABB DSQC 236C QYB560103-CC, Robot Drive Unit. in sealed original bag,

ADI-SOP-MUX08F 8-Chan/dual 4-Chan IC Chip

(A13) 1 GOULD MODICON AS-506P-002 MEMORY MODULE A13

INDRAMAT TVM2.1-050-W1-115 NSPP TVM21050W1115

YASKAWA ELECTRIC CACR-SR30BE13SY75 NSFP CACRSR30BE13SY75

FANUC A20B-0005-0711 USPP A20B00050711

ESCORT MEMORY SYSTEMS LRP-PT-CTL20 USPP LRPPTCTL20

RELIANCE ELECTRIC B/M-60002-3 USPP BM600023

OMRON V620-H01-1M NSFP V620H011M

PEPPERL & FUCHS LS600-DA-IBS/RTF1 NSFP LS600DAIBSRTF1

Siemens 6ES5 451-7LA11 6ES54517LA11

Siemens 6ES5-922-3UA11/6ES5922-3UA11 CPU MODULE XLNT

SIEMENS 6ES5-420-4UA11 NSFP 6ES54204UA11

Siemens 6ES5 444-3AA11 XLNT CONDITION

Siemens S5 6ES5 430-7LA12 6ES54307LA12 S5

SIEMENS 6SE9522-4DG40

Siemens 6ES7 331-1KF02-0AB0 -FS- 6ES73311KF020AB0

Spectrum Controls 8000 STC-402

National Instruments NI9512 Stepper Drive Interface Module with Encoder Feedback

WS-X45-SUP6-E Cisco Supervisor Engine 6-E Control processor

SIEMENS 6ES7 621-6BD02-0AE3 SIMATIC C7-621 ASI Worldwide

Siemens S5 CPU 926 6ES5 926-3KA12 6ES59263KA12

Reliance 14C104

Schneider Modicon GROUPE ZB6-AS834 NSFP ZB6AS834

Schneider Modicon AS-B262-001 USPP ASB262001

Schneider Modicon AS-S212-210 NSFP ASS212210

Schneider Modicon AS-B846-002 ANALOG MUX CURRENT IN MODULE

Schneider Modicon AS-B804-016 Output Module Rev M TESTED

Modicon MM-16MP-001 Interface Panel AS-040A-003

Siemens S5 Analog Input Module 6ES5498-1AA71

Siemens 6ES5 482-8MA13 6ES54828MA13

SIEMENS S5 6ES5 456-7LA11 Digital Output Module 16DO

SIEMENS 6FC3251-1AC-Z Sinumerik 810-T MachiOperator Interface ! WOW !

SIEMENS SINUMERIK 840D/DE NCU 573.4 6FC5357-0BB34-0AE0

SIEMENS 6SN1-114-0AA01-0AA0 USPP 6SN11140AA010AA0

SIEMENS SIMODRIVE 611 BOARD 6SN1118-0DJ23-0AA1

SIEMENS 6FC9-320-8CC USPP 6FC93208CC

ADVANTECH PCA-6010 PCA-6010VG PCA6010 in Box

ALLEN-BRADLEY 1771-OBD 10/60V DC Output Module 16 Outputs

ABB ACS800-U31-0050-5 Drive Type 12 Enclosed Industrial Control Panel 50 HP

ADEPT 10332-00655 ENHANCED VME VISION INTERFACE WITH 2 CAMERA CABLE ASSEMBLY

6-PACK INDUSTRIAL SCIENTIFIC M40 4-GAS, SERVICED/CALIBRATED W/CHARGERS &

9487 XYCOM MONITORS CRT REMANUFACTURED

STEELASTIC A46029 USPP A46029

CUTLER HAMMER 42PK USPP 42PK

CANDY CONTROLS DIFF-7 USPP DIFF7

NEMATRON CORP ICC-310 USPP ICC310

MICRO MOTION CMF050M322NRAUEZZZ NSFP CMF050M322NRAUEZ

FEDERAL SIGNAL 6H NSFP 6H

Siemens 6ES5 241-3CA11 6ES52413CA11

Siemens 6ES5-470-4UC11 USPP 6ES54704UC11

SIEMENS 6ES5-130-3AA21 USPP 6ES51303AA21

SIEMENS S5 Input 1P 6ES54207LA11 6ES5420-7LA11

Siemens 6ES5 300-3AB11 CENTRAL INTERFACE MOD

SIEMENS 6ES7621-6BD02-0AE3 SIMATIC C7-621 ASI ping Worldwide

SIEMENS Touch Glass + Protective film TP177A 6AV6642-0AA11-0AX1

Siemens 6ES5430-4UA14

Inter-Tel Mitel 5000 T1/E1 PRI 580.2700 Primary Interface Module

YOSHIMURA FOR YAMAHA YFZ450R 09-12

Siemens 6ES7 131-1BL01-0XB0 6ES7131-1BL01-0XB0 FreeShip

Siemens MP370 6AV6 545-0DA10-0AX0 Touchscreen Glass 12"

Parker 500 INDEXER

Schneider Modicon AS-B882-239 ASB882239 High Speed Counter

Schneider Modicon AS-521P-004 USPP AS521P004

Schneider Modicon AS-M480-008 ASM480008 Fast Shipping

Schneider Modicon AS-8535-000

Schneider Modicon 120V OUTPUT MODULE AS-B806-032 REPAIRED

Schneider Modicon AS-BDEP-216 Discrete Input

SIEMENS TI305-55N INPUT MODULE 24VAC/DC 305-55N 30555N

Schneider/Telemecanique Twido TWDLMDA20DRT

Siemens Sinamics AOP30 Operator Panel – Sinamics 6SL3055-0AA00-4CA5

SIEMENS 4700BDRMC3-11HN PANEL NIB

SIEMENS SINUMERIK 820 T 6FX1135-6BA01 TESTED WARRANTY

Cisco WS-SVC-CMM Communication Media Module Tested

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

SIEMENS SIMODRIVE 6SN1145-1AA01-0AA1SINUMETIK 840D NCU-BOX 6FC52476FC5356 [4]

Advantech PCA-6006V Rev.A1

Allen-Bradley 2711-T9C10 ser C rv E 3.15 PanelView 900

ABB 3HAC 020929-006 IPC, , 3HAC020929006,

Accuray 61595-003 61595003 Scanner in PWA CSQ

A200M4CAC CUTLER HAMMER A200M4CAC SIZE 4

810A09AB ALLEN BRADLEY

SIEMENS 6ES5-947-3UR21 USPP 6ES59473UR21

ASEA BROWN BOVERI 57360001-EV USPP 57360001EV

ALLEN BRADLEY 8600-2164M USPP 86002164M

MATTSON 5514027 NSFP 5514027

HONEYWELL 4409SMM USPP 4409SMM

ALLEN BRADLEY 150-A24NBDE USPP 150A24NBDE

ROTRON NC33A2G NSFP NC33A2G

Siemens 6ES5-375-0LD21 USPP 6ES53750LD21

SIEMENS 6ES5 451-7LA11 6ES54517LA11

SIEMENS 100U 6ES5 464 8ME11

Siemens PLC 6ES5-308-3UA12/6ES53083UA12 Interface

SIEMENS 6ES7 314-1AF11-0AB0 6ES73141AF110AB0 in Sealed, Old Box

Siemens PG 702 6ES7 702-0AA00-0YA0 6ES7702-0AA00-0YA0