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DCS 的維護可分為：日常維護;預防性維護和故障維護，日常維護和預防維護是在系統(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，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、濕度急劇變化導致在系統(tǒng)設備上的凝露。
　　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。
　　預防維護
　　有計劃地進行主動性、預防性維護,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、服務器、控制器、通訊網(wǎng)絡進行冗余測試。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)維護負責人應確認條件具備方可上電，并應嚴格遵照上電步驟進行。

Schneider Modicon AUTOMATION AS-BDA P-210 MODULE 5124

Schneider Modicon AS-BDAP-218Discreet Output Relay ASBDAP218

Schneider Modicon AS-C986-004 USPP ASC986004

Schneider Modicon DEP210/AS-BDEP-210 INPUT MODULE

Schneider Modicon 10 Slot 800 Series Rack/Chassis Model AS-H827-103 & PROCESSOR P810

Schneider Modicon AS-B356-001 ASB356001 N90

Schneider Modicon AS-P120-000 COMP 984 PS MOD POWER SUPPLY

Modicon/Schneider PanelMate PM+ 1000 Modbus MMPMMP003C

SIEMENS SIMATIC TI305-05N INPUT MODULE TI30505N

TELEMECANIQUE PLC PREMIUM TSXPSY5500 POWER SUPPLY

Siemens Simatic S5 6ES5-470-7LB11 Analog Output Module

SIEMENS / TI 505-4908 RELAY OUTPUT MODULE

SIEMENS Sinumerik DMP 16-E MODULE 6FC5111-0CA01-0AA0

SIEMENS 6SN1113-1AA00-0CA0 MODULE 6SN11131AA000CA0

SIEMENS SimoDrive 6SN1123-1AB00-BA1 Servo Drive

SIEMENS NCU-BOX 6FC5247-0AA00-0AA2 SINUMERIK 840D/DE

ADVANTECH PCL-747+ CPU Module

Allen-Bradley 2711-M14 Monitor

ABB 57310001-LM COMMUNICATION MODULE DSCS 131 57310001LM

ACME T169438, T-1-69438 True-Power Hardwired Transber, Constant Voltage 10kva

Aaronia EMI HyperLOG 20600 Antenna -

85051-60005 Agilent/HP 10cm Airline ; replaced by 85051-60010

SIEMENS 6GF2005-0BC01 USPP 6GF20050BC01

ASEA BROWN BOVERI PSTB57060070 USPP PSTB57060070

ASEA BROWN BOVERI 57360001-EL/1 USPP 57360001EL1

MITSUBISHI GT1585-STBD NSFP GT1585STBD

INDRAMAT KDA3.3-100-3-APO-W1 USPP KDA331003APOW1

ALLEN BRADLEY 813S-VOC USPP 813SVOC

SYMAX 8030-ROM-271 NSFP 8030ROM271

Siemens 6ES5-432-4UA12 USPP 6ES54324UA12

SIEMENS 6ES5 466-8MC11 6ES54668MC11

SIEMENS Digital Input 6ES5 420-7LA11 24VDC 4802

Siemens S5 6ES5 380 7AA11 TIMER MODULE BOXED

Siemens 6ES7 421-1BL00-0AA0 6ES7421-1BL00-0AA0 FreeShip

Siemens RWC62 Controller

Promise Removable Device PR401US Pegasus R4 4TB RAID System 4x1TB SATA

HONDA ACURA ACCORD 2002 UP iPOD iPHONE 3.5MM AUX INTERFACE MODULE US SELLER

Verb CIM2022 Verb Cim2022 Interface Module

Siemens 6AV7 803-0AB10-1AB0 Membrane Keypad

Siemens LOGO Programming Cable USB Version FreeShip

Omron 3G2A5-ID218

Schneider Modicon AS-P933-007 PLC

Schneider Modicon AS-P371-002 PROGRAM PACK

Schneider Modicon AS-EM85-301 NSFP ASEM85301

Schneider Modicon GOULD PROCESSOR AS-884A-301

Schneider Modicon AS-BDAP-208

Schneider Modicon PROGRAM TERMINAL AS-P190-212 REPAIRED

Telemecanique ATS46 CPU Board

Schneider Telemecanique Circuit Breaker GV2-RS08 C NIB

Siemens6ES7222-1EF00-0XA0EM222OutputModule

Siemens 6AV6542-0BB15-2AX0 OP170B 6AV65420BB152AX0 Fast Shipping

SIEMENS Sinumerik 6EV3055-0DC. Power Supply Module .

GE FANUC IC600CB516M COMMUNICATION MODULE

SIEMENS With Kompass KBX-151L

SIEMENS SINUMERIK 6FC3538-3EF 6FC35383EF USED

SIEMENS Moore Hawke Fieldbus Device Coupler 200 Series Profibus

ALLENBRADLEY FLEX I/O ANALOG OUTPUT MODULE CAT:1794-OF4I

A-B Allen Bradley 8510A-A11-A2 AC Spindle Drive Controller 200/230V

AC Motor Control Drive - 50 HP - 600 Volt - Three Phase Input

A06B-0502-B756 FANUC AC SERVO SPINDLE REMANUFACTURED

75 KW 575v Electric Generator WEG Model: GTA200 MI 30 Bi Lateral Rotation

RELIANCE ELECTRIC 86466-59SCR USPP 8646659S

ALLEN BRADLEY 4100-234-RL USPP 4100234RL

ALLEN BRADLEY 1785-L20E USPP 1785L20E

INDRAMAT DDC01.2-N200A-DS01-02 USPP DDC012N200ADS010

YAMATAKE 82408667-001 USPP 82408667001

VIBRO METER VM600-CSA USPP VM600CSA

HONEYWELL 30732219-002 USPP 30732219002

Siemens 6ES5-243-1AA1/6ES5243-1AA1 ANALOG INPUT MODULE XLNT

SIEMENS 6ES5 376-0AA11 6ES53760AA11

SIEMENS Digital Output Module 6ES5 456-4UA12 Version 1 Possibly

Siemens 6ES5 998-8MA22 NSFP 6ES59988MA22

Siemens 6ES5921-3UA12

Siemens MP277-10 6AV6643-0DD01-1AX1 Touch Glass

RELIANCE ELECTRIC 0-57405-C USPP 057405C

Texas Instruments 500-5828A

SQUARE D S48891 MOD DIFF GROUND FAULT INTERFACE MODULE

UNIPRO 24002156 USPP 24002156

Siemens CB24 COM BOARD 6RX1240-0AK01

Modicon AS-W904-050

Schneider Modicon 3038DEP216/AS-BDEP-216 Input Module

Schneider Modicon S911 PROCESSOR MODULE AS-S911-801

Schneider Modicon AS-BDAU-202 2 Point Output Module

Schneider Modicon AS-BDAP-204 Compact Out Module ASBDAP204

Schneider Modicon /Schneider AS-B873-011/AB873011 NICE

Schneider Modicon Compact AS-BDAP-216 ASBDAP216 DC Output NIB

Schneider Modicon TSXPCX1031-C TSXPCX1031C PLC Cable

SCHNEIDER TSX COMPACT DISCRETE INPUT FAST INPUT MODULES DEP 220/AS-BDEP-220

RADISYS EXM18-RS422 USPP EXM18RS422

SIEMENS 6ES5-456-7LA11/6ES5456-7LA11 OUTPUT MODULE NIB

SIEMENS SINUMERIK OP010 6FC5203-0AF01-0AA0 MembraKeypad

Mitsubishi F2-20GF Communication Module Free Ship

SIEMENS Simodrive 6SN1118-0DG22-0AA0 E GWE-567008901365

SIEMENS Sinumerik FM 6FC5210-0DA00-1AA1 6FC5 210

SIEMENS 6FC5203-0AB00-0AA0 Sinumerik OP030 Free Ship

ALLENBRADLEY1734-OB4EOUTPUTMODULE

Allen Bradley SLC 500 1747-L40A Processor Output Module Good Condition

ABB Robot Teach Pendant PROG.ENHET S4 3HAA3575-ABA Rev.10

A06B-0143-B175#0008 FANUC SERVO MOTORS REMANUFACTURED

003310 A/B SIEMENS TYP: 03311-A NR. 331346 GE548201.0002.00 IN STOCK AT DUBAI

MODICON PC-L984-785 NSFP PCL984785

ALLEN BRADLEY 150-B500NBDB NSFP 150B500NBDB

ALLEN BRADLEY 1326-ABC2F-11 NSFP 1326ABC2F11

GENERAL ELECTRIC 331X414AAG02 USPP 331X414AAG02

SQUARE D HU364DS USPP HU364DS

SIEMENS 6SC9811-2BE34 USPP 6SC98112BE34

ASEA BROWN BOVERI ACS401601132 NSFP ACS401601132

Siemens 6ES5 943-7UB21 -- 6ES5 943-7UB21

Siemens Simatic S5 6ES5 463-4UA12 6ES54634UA12

SIEMENS 6ES5-700-3LA12

Siemens 6ES5 460-4UA11/6ES54604UA11 Analog Input

Siemens 6AG1 214-1AD23-2XB0 Siplus CPU224 in Box = 6ES7 214-1AD23-0XB0

SIEMENS HOUR COUNTER 7KT5745-1 230V 50HZ NIB

SANS DIGITAL MR4UT 4-bay hot-swap hardware RAID storage

Square D QOB 120

Siemens IM306 Interface Module 6ES5 306-7LA11

SERIES C F/W REV B PKG 2011 QTY

Siemens 6SE7021-8CB20 6SE7 021-8CB20

Siemens TXB1.P1

Schneider Modicon DAP 216N/AS-B DAP-216N

Schneider Modicon ASB885001 TESTED PERFECT CONDITION Basic Module AS-B885-001

Schneider Modicon AS-B838-032 800 I/O 24VDC TRU HI OUT 32PT

Schneider Modicon AS-B883-016 B833016

Schneider Modicon B807 120 VAC Input AS-B807-032

Schneider Modicon AS-H827-100 Secondary Housing ASH827100

SCHNEIDER OUTPUT MODULE TSX ASY 410 TSXASY410

SIEMENS 6ES5-421-8MA12/6ES5421-8MA12 INPUT MODULE NIB

Rockwell Automation SCR Scaling Bridge Module SD3000 Plus SD3K-SCLR400 97324971

SIEMENS CONTROL MONITOR M IPC3510A300MGT TOUCH SCREEN

SIEMENS SINUMERIK 840DE NCU 561.2 6FC5356-0BB11-0AE0

Reliance Electric Network Communication Module 0-57404-1E_0574041E_O-57404-1E

SIEMENS CONTROLLER CARD 6SN1118-0AD11-0AA1

SIEMENS SIMODRIVE 6SN1145-1AA01-0AA2

SIEMENS 6FC5110-0CB01-0AA0 6FC51140CB010AA0 version E

AllenBradley2711P-RP6A

ALLEN BRADLEY VERSAVIEW 1500M OPERATOR INTERFACE TOUCH PANEL 6186-M15AL SER B

ABB frequency converter ACS550-01-180A-4 90KW 380V for industry use

Advanced Energy Cesar 405 RF Power Supply 230VAC 4.8A 500W 40.68MHZ

(M5) 1 XYCOM 9450 INDUSTRIAL COMPUTER

MARPOSS 3413024100 NSPP 3413024100

ALLEN BRADLEY 1336-B005-ECD-FC3-L3 NSPP 1336B005ECDFC3L3

GE FANUC IC3600SFKK1 USPP IC3600SFKK1

FANUC A06B-6064-C303 USPP A06B6064C303

SIEMENS 1PP7113-4AA91-ZT00 NSPP 1PP71134AA91ZT00

RELIANCE ELECTRIC 0-846181-3R USPP 08461813R

SIEMENS 6ES5-242-1AA41 USPP 6ES52421AA41

Siemens 6ES5 467-8EF11 6ES54678EF11

Siemens 6ES5-944-7UA22 USPP 6ES59447UA22

SIEMENS 6ES5-435-7LA11 USPP 6ES54357LA11

Siemens 6ES5 701 1LA12 EXPANSION RACK I/O ER1

Siemens S5 6ES5 928-3UB11 6ES59283UB11

Siemens C79453-A3033-A581

SIEMENS 6ES5-305-7LA11 USPP 6ES53057LA11

Square D 8020 SCP-323

OEM Mercedes Benz HMI Bluetooth Module Cradle Adapter Interface B6 787 5878

WS-C3750G-16TD-S FREE 1 YEAR - CATALYST 3750G SWITCH

Siemens 6ES7253-1AA22-0XA0

SIEMENS SIMATIC PG702 6ES7702-0AA00-0YA0 PG 702 in Box ping

Reliance 803456-21T

Schneider Modicon ASWBXT201Compact Primary Rack AS-WBXT-201

Schneider Modicon AS-B375-000 USPP ASB375000

Schneider Modicon AS-T884-001 USPP AST884001

Schneider Modicon AS-BDAP-212 ELECTRONIC

Schneider Modicon AS-B824-016

MODICON AS-B352-001 OUTPUT MODULE OLD STOCK FREE SAME DAY SHIPPING USA

SIEMENS Input Module 6ES5 421-8MA12

SIEMENS / TI 505-4616 DISCRETE OUTPUT MODULE

Siemens Operator Panel OP 17-DP12 6AV3 617-1JC30-0AX1

SIEMENS SINUMERIK 3 CU/EU COUPLER 6FX1120-3BB01

TELEMECANIQUE TSX-MAP-1074 COMMUNICATION MODULE TSXMAP1074

SIEMENS 6SN1118-0DM21-0AA0 USPP 6SN11180DM210AA0

SIEMENS Simodrive (Bima Axis Card) 6SN1122-OBA11-OAA1 inBox

SIEMENS 6FC53570BA330AE0

Advantech PCM-7130 Rev.A1 NIB

Allen-Bradley 1746-OV16 SLC500 Output Module Series B

ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 84824

ADEPT TECH 10330-00710 USPP 1033000710

(00 no lot#) ITE Circuit Breaker HNXD63B120 1200A 600V

IMPERIAL 08124800 USPP 08124800

TECH MOTIVE TOOL 48D200P1001 USPP 48D200P1001

DOLAN JENNER SS7B481MDO NSFP SS7B481MDO

CTC PARKER AUTOMATION P71-3C2-A2-2A1 USPP P713C2A22A1

PCME LTD DM-990 USPP DM990

MODICON AS-506P-008 USPP AS506P008

HEWLETT PACKARD TEST & MEASURE E1460A NSFP E1460A

Siemens 6ES5 308-3UC11 6ES53083UC11

Siemens 6ES5-525-3UA21 NSFP 6ES55253UA21

SIEMENS 6ES5-373-0AA41 MEMORY MODULE 6ES53730AA41

Siemens 6ES5 234-1AD11 S5 MEMORY PARAM MODULE PLC CARD CIRCUIT 56784

Siemens 6ES5-420-4UA12/6ES54204UA12 NICE

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

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

Siemens 6ES5760-0AB11

LANZE INTERFACE MODULE TYPE E82ZAFSC

YASKAWA ELECTRIC JAMSC-B1010 USPP JAMSCB1010

SIEMENS 6ES7 223-1BF20-0XA0 6ES7223-1BF20-0XA0 FreeShip

Siemens OP37 6AV3 637-1ML00 Membrane Keypad

Red Lion RMX00000

Schneider Modicon AS-B807-132 ASB807132 32 Point AC Input NIB FS

Schneider Modicon AS-884A-201 NSFP AS884A201

Schneider Modicon AS-P120-250 NSFP ASP120250

Schneider Modicon AS-B239-001 ASB239001 HIGH SPEED COUNTER MODULE

Schneider Modicon AS-521P-111 CNC Memory Board Rev A AS-IS

Modicon XBT FC044610 Telemecanique Magelis 24VDC 35W

SIEMENS SIMATIC S7 SM323 IN/OUT INPUT OUTPUT MODULE 6ES7323 6ES7 323-1BH01-0AA0

Telemecanique XBT-F024411E XBTF024411E

SIEMENS SIMATIC RELAY OUTPUT MODULE 6ES7 322-1HH01-0AA0 E-STAND:03 NIB

Siemens 9510 9510EC-1156-GZTA NIB Power Meter Display ION Ethernet Access

SIEMENS SINUMERIK HANDWHEEL 6FC9320-5DC00 NENIB

SIEMENS 6SN1122-0BA12-0AA0 6SN11220BA120AA0 Simodrive

SIEMENS SIMODRIVE 6SN1123-1AA01-0FA0

SIEMENS I/O MODUL 64E/32 6FC3988-3RA DC 20-30 V

ADVANTECH PCM-4823 Single Board Computer

ALLEN-BRADLEY 2711-K5A20 PANELVIEW 550 2711K5A20 CLEAN TESTED GOOD COND.

ABB 5SDF0345D0006 Thyristor for ACS1000 AC Drive

ACS CM-1AE-MO-LV NSPP CM1AEMOLV

68A7649P22 WESTCODE POWER MODULE 1 PC & ORIGINAL

8520-AA21 ALLEN BRADLEY DRIVES REMANUFACTURED

SIEMENS 6SE3-214-0DA40 NSFP 6SE32140DA40

AUTRONICA EA-300/G USPP EA300G

ASEA BROWN BOVERI DSQC-314A USPP DSQC314A

MIYACHI MM-326B USPP MM326B

INDRAMAT MDD-071A-N-030-N2T-095PB0 USPP MDD071AN030N2T09

ASEA BROWN BOVERI 57088648 NSFP 57088648