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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。

ABB ELECTRIC MOTOR LOW VOLTAGE 440V 3 PH 3545 R/MIN M3AA180LB2 IEC 180M/L48

A06B-0333-B069#7000 FANUC AC SERVO SPINDLE REMANUFACTURED

(Y3-4) 1 JAMESBURY 815W-11-22HB-XZ WAFER-SPHERE VALVE Y3-4

8500-B2C-L1BN ALLEN BRADLEY SERVO MOTORS REMANUFACTURED

SIEMENS 6ES7-470-1VB10 USPP 6ES74701VB10

ALLEN BRADLEY SA3100-B010-AE-L6R USPP SA3100B010AEL6R

ALLEN BRADLEY 1771-NIV1 NSPP 1771NIV1

GE FANUC 44A751082-012R01 USPP 44A751082012R01

MODICON 557VIC10200 NSFP 557VIC10200

INDRAMAT MDD093A-N-030-N2L-110GB0 USPP MDD093AN030N2L1B

ASEA BROWN BOVERI GNT0137200R0002 USPP GNT0137200R0002

TRIAD TR-18-8K-20 USPP TR188K20

Siemens 6ES5-450-3AA11 NSFP 6ES54503AA11

SIEMENS 6ES5 700-0LA11 6ES57000LA11

SIEMENS S5 6ES5 374-1KH215V Flash 256 kByte Memory 16Bit

Siemens S5 6ES5 955-3LF11 6ES5955 6ES595553LF11

Siemens 6ES7 972-0BA41-0XA0 6ES7972-0BA41-0XA0

Siemens S7 6ES7307-1BA00-0AA0

Siemens 335-37

Honeywell Interface Module Communicating Thermostat Telephone Access Module

WARRANTYSERIES A F/W REV 4.2

Siemens 6DS1730-8AA 6DS17308AA in box, seal opened,

Siemens LOGO! 24RCL PLC 6ED1 053-1HB00-0BA2

Omron 3G2A5-RM001-PEV1

Schneider Modicon AS-M680-008 8K 8 K RAM Memory Module

Schneider Modicon P800 POWER SUPPLY AS-P800-003

Schneider Modicon AS-H827-000 USPP ASH827000

Schneider Modicon GROUPE AS-HDTA-200 NNB

Schneider Modicon AS-BDEP-218

Schneider Modicon S201 S202 AS-201P-000 AS-202P-000 Board

TELEMECANIQUE Magelis HMI XBT-G2330 XBTG2330

SCHNEIDER Telemecanique Switch XB4 BVB1

SIEMENS/TEXAS INSTRUMENTS 2 AMP OUTPUT MODULE 505-3716

Siemens 6AV6 542-0AD15-2AX0 MP270 Simatic Multi Panel

SIEMENS SINUMERIK 6FC5203-0AF02-0AA0 MembraKeypad

GE FANUC CCM COMMUNICATIONS MODULE CATIC655CCM500C

SIEMENS Sinumerik Simodrive Drives Rack 6SC 6101-4A-Z

SIEMENS SIMODRIVE 6SN1146-1AB00-0BA2SINUMETIK 840D NCU-BOX 6FC52476FC5356 2KH

SIEMENS 16297-22 LIL BOARD KIT - NIB

Allen-Bradley Analog Output Module 1778-OFC

AB, ALLEN BRADLEY AC SERVO ULTRA SERIES 1398-DDM-150 AE

AC Motor Speed Control VFD - 60 HP - 480 Volt - Three Phase Input

A06B-0755-B921#C100 FANUC AC SERVO SPINDLE REMANUFACTURED

75HP 3600 RPM TEFC motor 365TS frame, 460/3/60 Rebuilt

RELIANCE ELECTRIC VZ3000-DASR-1 USPP VZ3000DASR1

ALLEN BRADLEY 6151-BBBACDAZABZ USPP 6151BBBACDAZABZ

ALLEN BRADLEY 2705-P11J1L USPP 2705P11J1L

INDRAMAT MDD-090C-N-030-N2L-110PB0 NSFP MDD090CN030N2L1A

YASKAWA ELECTRIC JANCD-SV02B NSPP JANCDSV02B

WESTINGHOUSE NB2800P-400 USPP NB2800P400

ITE SIEMENS JD23B400 USPP JD23B400

Siemens 6ES5-247-4UA31/6ES5247-4UA31 POSITIONING MODULE NIB

SIEMENS 6ES5 377-0AB41 6ES53770AB41

SIEMENS OP393-II 6ES5 393-0UA12 6ES5393-0UA12 FreeShip

Siemens BOARD 6ES5-410-0AA12 6ES5 410 0AA12 6ES54100AA12 SPCB205 SIEMEN

SIEMENS 6ES7 151-1CA00-0AB0 6ES7151-1CA00-0AB0 FreeShip

Siemens OP17 6AV3 617-1JC00-0AX1 Membrane Keypad

RELEASE SuperMicro X9SRL-F MB ※Check W/ Us for Availability FIRST※

Texas Instruments 505-6508

Sunpak Interface Module NE-1AF

TYAN THUNDER N6550EX S4989 S4989-SI AMD QUAD SKT 1207 SERVER BOARD S4989WG2NR-SI

Siemens CPU 221 6ES7 211-0BA23-0XB0 6ES7211-0BA23-0XB0

Modicon DR-1010-000

Schneider Modicon /Schneider AS-B875-102/ASB875102 NICE

Schneider Modicon ASB824016 SEALED 24 VDC True High Output Module AS-B824-016

Schneider Modicon AS-BDEP-216 NSFP ASBDEP216

Schneider Modicon AS-BDEO-216 16 Pt 24VDC Input ASBDEO216

Schneider Modicon -AS-521P-006

Schneider Modicon DEP 218/ AS-BDEP-218 DISCRETE INPUT MODULE

Schneider Telemecanique ATV28HYU29M2 Inverter 1.5K/2HP

SCHNEIDER MODICON AS-B805-016 115VAC INPUT MODULE

QLogic SANbox 9200 Switch 9000 SB9200-32B 31277-12

SIEMENS 6ES5-453-7LA11/6ES5453-7LA11 DIGITAL OUTPUT MODULE XLNT

SIEMENS 6DD1600-0AF0 Simadyn D CPU Controller

Mercedes-Benz Bluetooth Hands-Free Communication Module

SIEMENS SIMODRIVE 6SN1123-1AA00-0BA1/OBA0

SIEMENS SINUMERIK 840DE 6FC5356-0BB14-0AA0 NCU 561.4

SIEMENS /MOORE 39MBXNAN/16180-1 MODULBUS EXPANDER XLNT

Allen-Bradley User's Manual Pulse Output Module Assembly Cat No. 1778-OJ_1978

Allen Bradley SLC 500 1746-N04V Ser A Analog Output Module

ABB Robotics PS 90/6-57-P-LSS-4843 AC Servo Motor DanaherMotion 3 HAC 3403

A06B-0147-B084 FANUC SERVO MOTORS

0-49011-1 RELIANCE PLC MODULES REMANUFACTURED

NAMCO ER920-13812 NSPP ER92013812

ALLEN BRADLEY 1756-L61 FNFP 1756L61

ALLEN BRADLEY 1336-C010-EAD-SI USPP 1336C010EADSI

GENERAL ELECTRIC 7VXAS057CD08 USPP 7VXAS057CD08

STI 70016-1189 NSFP 700161189

SIEMENS 7SD5111-5CA02-1AA0/EF NSPP 7SD51115CA021AA0

BARBER COLMAN DYN2-40025-024-0-12 NSFP DYN240025024012

Siemens 6ES5 945-7UA23 -- 6ES59457UA23

Siemens Simatic S5 6ES5458-4UC11 6ES54584UC11

SIEMENS 6ES5-715-0BC50 USPP 6ES57150BC50

Siemens 6ES5 490-8MB11 Connector Assembly

SIEMENS 6AV6 545-0AA15-2AX0 TP070 touchscreen glass

Siemens KTP600 6AV6647-0AD11-3AX0 Touch Glass

S-4000S-3208 S-1608 = 48x16 Digital Stage I/O

Telemecanique ATV66D12M2

SIEMENS LMG-90 PRESSURE TRANSDUCER INTERFACE MODULE XLNT

Wago 758-876/000-112 WAGO-I/O-IPC-P14 Linux 2.6 codesys visu CANopen master

Siemens 6SE7038-6GL84-1JA1 6SE7 038-6GL84-1JA1 FreeShip

Modicon AS-M485-008

Schneider Modicon AS-B984-100C B984 I/O LOGIC SOLVER

Schneider Modicon AS-B865-001 8 Channel Register ASB865001 N833

Schneider Modicon AS-B864-001 USPP ASB864001

Schneider Modicon AS-P120-000 POWER SUPPLY

Schneider Modicon CONTROL MODULE AS 884A 21

Schneider Modicon AS-HDTA-201 Secondary Subrack 5 Slot

SCHNEIDER MODICON AS-BDAP-210 TSX OUTPUT MODULE

SIEMENS 6ES5 463-4UA12 ANALOG INPUT MODULE

Rigol Function/Arbitrary Waveform Generators DG3121A

SIEMENS A5E00159514 PANEL TOUCH SCREEN

SIEMENS SINUMERIK FM-NC/810D/DE/840D/DE 6FC5203-0AB11-0AA2

Reliance Communications Mem. Module Part 57413

SIEMENS Drive 6SN1123-1AA00-0BA1

SIEMENS SINUMERIK 840D/DE NCU 573.5 6FC5357-0BB35-0AE0 NIB

SIEMENS 6FC4600-1AS01 Free Ship

AllenBradley2711-K10G16/C2711K10G16Panelview

Allen Bradley Versa View 1500H 6189-RDT15CA 2711P-RN6 6182-15TEH6B

ABB IRB 1400 SER 14-20056 ROBOT S4C PLUS CNTRLR TEACH PENDANT W/ MATCHED SET

Advanced Energy VHF 2060 RF GENERATOR AMAT 0920-00056

(O2-1) 1 BLH ELECTRONIC C3P1 LOAD TRANSDUCER O2-1

MEASUREX 09806701 NSPP 09806701

ALLEN BRADLEY 1336F-B050-AA-EN-HASP-L6 USPP 1336FB050AAENHA1

GE FANUC IC800SSI216D2 USPP IC800SSI216D2

FANUC A16B-2100-0110 USPP A16B21000110

SIEMENS 6DS1220-8AA USPP 6DS12208AA

RELIANCE ELECTRIC 57C-330-B USPP 57C330B

SIEMENS 6SC-6100-0NA80 NSFP 6SC61000NA80

Siemens 6ES5 470-7LB12 6ES54707LB12

Siemens 6ES5-950-1AB61/6ES5950-1AB61 POWER SUPPLY NNB

SIEMENS 6ES5-441-5AA12 USPP 6ES54415AA12

Siemens 6ES5 955-3LC41 6ES59553LC41 Power Supply Module

Siemens S5 6ES5-464-8MA21

Siemens C98043-A1601-L4-17

Siemens 6ES5 464-8MF11 -FS- 6ES54648MF11

Square D 8030 CIM-101

ON Q Home 8 Port Network Interface Module 363486-01

WS-C2960-24TC-S CISCO 2960-24TC SWITCH- W/1YR - WSC296024TCS Fast

Siemens 6ES7331-7KB00-0AB0 NIB

SIEMENS SINUMERIK 6FC5203-0AF02-0AA1 , no box,

Saftronics CIMR-G3U47P5

Schneider Modicon ASMEEP001 Compact EEProm Card AS-MEEP-001

Schneider Modicon AS-B552-001 USPP ASB552001

Schneider Modicon AS-W801-012 3485-2400 REMAN W801012 34852400

Schneider Modicon AS-BDEP-218 PLC

Schneider Modicon AS-B827-032 Input Module

MODICON AEG PANELMATE PLUS OPERATOR INTERFACE MM-PM22-200 PARTS OR REPAIR

Siemens Digital Input Module 6ES5433-8MA11 MAYBE

SFP-GE-T 1000BASE-T SFP MODULE FOR CISCO NEBS 3 ESD

Siemens OP27 6AV3627-1JK00-0AX0

SIEMENS Sinumerik 6FC5111-0CA02-0AA2 DMP KOMPAKT 16A 24V/0.5 E-Stand A

STANDARD COMMUNICATIONS CELLULAR MODULE CMM8700-101

SIEMENS 6SN1123-1AA00-0AA0 Simodrive LT-Module

SIEMENS C98043-A1304-L C98043A1304L SIMODRIVE XLNT

SIEMENS 6FC5-247-0AA34-0AA1 NSFP 6FC52470AA340AA1

ADVANTECH SOM-A2552

ALLEN-BRADLEY 160-P1 PROGRAMMING TERMINAL KEYPAD ""

ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 88248

ADEPT TECH 10332-12410 NSPP 1033212410

(12) Hoffman A36X2E5410 Control Panel Enclosures 36" x 54.5" x 11.5"

INDRAMAT DDS03.2-W/030B USPP DDS032W030B

TELEMECANIQUE TSX-P871 USPP TSXP871

EPSON E2L653S-UL USPP E2L653SUL

CUTLER HAMMER D7DBA10AGA1XXX USPP D7DBA10AGA1XXX

RELIANCE ELECTRIC 0-51864-2 NSPP 0518642

MODICON AS-P530-OMA USPP ASP530OMA

INDRAMAT TRANS01-6/1-109-488-4800 USPP TRANS01611094884

Siemens 6ES5 318-8MB12 6ES53188MB12

Siemens 6ES5-535-3MA12 USPP 6ES55353MA12

SIEMENS 6ES5-374-2FH21 USPP 6ES53742FH21

Siemens 6ES5 373 1AA41 6ES5 373-1AA41 6ES53731AA41 Memory Module

Siemens 6GK1-543-0AA02/6GK15430AA02

Siemens 6RA70 BOP Operator Panel

SIEMENS TP270-10 6AV6545-0CC10-0AX0 Touch Glass

Siemens 6ES5951-7LD12

LOT 6 CISCO VWIC-2MFT-T1 2-PORT MULTIFLEX WAN VOICE DATA INTERFACE CARD MODULE

YAMAHA MOTIF XF8 WORKSTATION SYNTHESIZER KEYBOARD

Siemens 6ES7 223-1PL21-0XA0 6ES7223-1PL21-0XA0

SIEMENS OP7 6AV3 607-1JC30-0AX1 Membrane Keypad

Reliance 0-51811-7

Schneider Modicon AS-B802 PLC

Schneider Modicon AS-9487-002 USPP AS9487002

Schneider Modicon AS-P421-000 USPP ASP421000

Schneider Modicon AS-B550-000 USPP ASB550000

Schneider Modicon AS-884A-211 Processor Module AS884A211 UVG

Modicon Square D XBT-F024110 XBTF024110 Operator Interface

SIEMENS SIMATIC S5 INPUT MODULE 6ES5-431-7LA11

Siemens 6ES7 332-5HB01-0AB0 -FS- 6ES73325HB010AB0

Siemens Simatic Output Module 6ES5 451-7LA21 __ 6ES5451

SIEMENS Sinumerik 802S 802C 802 5.7 inch LCD screen display

SIEMENS Sinumerik Module Modul DMP #6FC5111-0CA03-0AA2

SIEMENS 60 DAYS WARRANTY Control Board w/ 6SN1114-0AA01-0AA0

SIEMENS Simodrive 6SN1123-1AA00-0AA0 _ 6SN11231AA000AA0

SIEMENS CONTROLLER CARD 6FC5357-0BB11-0AE1

Advantech RS-422/485 Isolated Repeater ADAM-4510S

Allen-Bradley 2711-B5A5 Series H Panelview 550 Touchscreen FRN 4.46

ABB AC Drive ACH550-UH-096A-4, 75HP 0-480V 0-500Hz 96A

Acterna JDSU T-BERD 8000 8126 SR SingleMode Fiber OTDR 8126SR TBERD T BERD

6ES7135-0HF01-0XB0 Brand , Factory Sealed,

85644A - HP/Agilent Tracking Source 300 kHz to 6.5 GHz

SIEMENS 6SE7-031-2TF60-Z USPP 6SE70312TF60Z

BAILEY CONTROLS NCOM-04 NSFP NCOM04

ATLAS COPCO 8433-1740-00 USPP 8433174000

MODICON AS-521P-111 NSFP AS521P111

INDRAMAT TRANS-01.5/1-109-468-4800 USPP TRANS01511094684

BALDOR ID15H507-E USPP ID15H507E

WHEDCO CMC-2071-1B USPP CMC20711B

Siemens 6ES5-451-7LA11 NSFP 6ES54517LA11

SIEMENS 6ES5 705-0BB50 INTERCONNECT CABLE IN BOX

SIEMENS S5 6ES5 436-7LA11 6ES54367LA11

Siemens S5 Input / Output Module 6ES5 482-3BA11

Siemens 6ES7131-4BF00-0AA0 6ES7 131-4BF00-0AA0 FreeShip

Siemens S7-200 EM231 RTD 6ES7 231-7PB22-0XA0 EM 231

Siemens 3TX7002-1BB00

HORIBA STEC -- CNL-06A -- Computer Interface Module RGA Residual Gas Analyzer

Weidmuller Interface Module 912441 RI-DIP14A. GSED 0.3 IN BOX

Siemens 6ED1055-1FB00-0BA1 in Sealed Box ping

Siemens LOGO! 6ED1052-1HB00-0BA6 NIB + LOGO USB Cable

Omron 3G3MV-A2001

Schneider Modicon AS-J810-000 REMOTE I/O ADAPTER GOOD TAKEOUT

Schneider Modicon Gould/ AS-B230-501 PLC Output Module

Schneider Modicon AS-H827-107 USPP ASH827107

Schneider Modicon MODICON/ AS-B551-000 INPUT MODULE XLNT