国产精品久久久久久久久,四季AV一区二区夜夜嗨,日韩精品无码中文字幕电影,www.五月婷婷.com

6ES5375-0LC41現(xiàn)貨 in stock! 歡迎來電咨詢~??！

作為火電廠安全經(jīng)濟(jì)運(yùn)行主導(dǎo)因素的熱控自動(dòng)化設(shè)備DCS系統(tǒng)，近年來得到了普遍應(yīng)用，為火電廠機(jī)組安全、穩(wěn)定的運(yùn)行起到了積極的作用。但是，DCS系統(tǒng)的安全性和可靠性還有待提高，在運(yùn)行過程中經(jīng)常會(huì)出現(xiàn)這樣或那樣的故障，這些故障的出現(xiàn)，導(dǎo)致了發(fā)電機(jī)組的非計(jì)劃停運(yùn)，給發(fā)電企業(yè)造成不應(yīng)有的損失。
　　1、DCS系統(tǒng)常見的故障
　　隨著工業(yè)生產(chǎn)自動(dòng)化的不斷興起、過程控制要求的日益復(fù)雜，一種綜合控制系統(tǒng)――DCS系統(tǒng)應(yīng)用而生了。由于目前各火電廠對(duì)DCS系統(tǒng)的應(yīng)用水平的限制，系統(tǒng)在運(yùn)行過程中難免會(huì)出現(xiàn)故障。常見的DCS系統(tǒng)故障有：電源系統(tǒng)故障、硬件(模件)故障、系統(tǒng)軟件故障和通信網(wǎng)絡(luò)系統(tǒng)故障。
　　1.1電源系統(tǒng)故障
　　電源故障是DCS系統(tǒng)的致命故障，一旦電源出現(xiàn)故障，不僅整個(gè)系統(tǒng)會(huì)停止運(yùn)行，而且還會(huì)導(dǎo)致機(jī)組的跳閘，造成非計(jì)劃停運(yùn)。
　　1.1.1電源系統(tǒng)出現(xiàn)故障的主要原因
　　電源方面的問題比較多，一是備用電源不能自投，雖采用UPS和APS雙路互為備用的供電方式，但在轉(zhuǎn)換時(shí)也會(huì)出現(xiàn)瞬間失電，導(dǎo)致機(jī)組跳閘;二是保險(xiǎn)配置不合理及DPU電源內(nèi)部故障等造成電源中斷，導(dǎo)致系統(tǒng)運(yùn)行的停止;三是穩(wěn)壓電源波動(dòng)引起保護(hù)誤動(dòng)及接插頭接觸不良導(dǎo)致穩(wěn)壓電源無輸出;四是有的系統(tǒng)整個(gè)機(jī)柜通過一路保險(xiǎn)供所有輸入信號(hào)或一路電源外接負(fù)載很大，導(dǎo)致模件的損壞;五是系統(tǒng)電源未采用UPS供電，冗余備用就更無從談起。
　　1.1.2電源系統(tǒng)故障應(yīng)采取的防范措施
　　要保證DCS系統(tǒng)的安全、穩(wěn)定，首先要具備合理的電源布置，其次要選用高質(zhì)量的電源模塊，并要保證較高的冗余率。再次是注意觀察電源的輸出電壓，防止出現(xiàn)波動(dòng)。第四是對(duì)電源實(shí)行壽命管理，該更換的時(shí)候必須更換，絕對(duì)不允許等到電源出現(xiàn)了故障的時(shí)候才更換。
　　1.2硬件(模件)故障
　　DCS系統(tǒng)的硬件(模件)卡件可分為處理器模件、I/O模件及通訊模件三大部分，這三大模件的功能各自不同，常見的故障部位為過程通道和人機(jī)接口。
　　1.2.1硬件(模件)出現(xiàn)故障的主要原因
　?、龠^程通道故障也就是I/O卡件故障。引起I/O卡件發(fā)生故障的第一方面的原因是卡件因長(zhǎng)時(shí)間工作而出現(xiàn)老化和損壞，這種工作的發(fā)生，一般是隱藏性的，只有參數(shù)出現(xiàn)異常，系統(tǒng)才會(huì)報(bào)警;第二個(gè)方面是連接線松動(dòng)導(dǎo)致部分I/O模件與主機(jī)的通信中斷，在這種情況下，系統(tǒng)會(huì)馬上做出反應(yīng)，出現(xiàn)報(bào)警;第三個(gè)方面是外界強(qiáng)電信號(hào)竄入形成干擾而導(dǎo)致通道故障的發(fā)生。
　　②諸如球標(biāo)和控制操作出現(xiàn)失靈和實(shí)效以及操作員站出現(xiàn)死機(jī)、鍵盤和打印機(jī)出現(xiàn)工作不正常的現(xiàn)象都屬于人機(jī)接口故障。
　　球標(biāo)操作失靈的原因有裝置因長(zhǎng)時(shí)間工作發(fā)生老化或者被浮塵或油膩污染，致使觸點(diǎn)不能實(shí)現(xiàn)自行通斷，也或是電纜插頭接觸不良造成與主機(jī)的通信斷路。
　　控制操作實(shí)效的主要原因是因球標(biāo)的操作信號(hào)不能改變過程通道的狀態(tài)，有三種可能：其一可能是過程通道硬件發(fā)生故障;其二可能是操作員站所用軟件的缺陷;其三是設(shè)備超負(fù)荷或者過多地打開窗口，導(dǎo)致不響應(yīng)。
　　操作員站死機(jī)的原因基本與控制操作失效的原因相同。
　　鍵盤工作不正常的原因有：鍵盤組態(tài)出現(xiàn)錯(cuò)誤、接觸不良、連接電纜松動(dòng)或者在啟動(dòng)主機(jī)時(shí)誤動(dòng)了鍵盤，造成啟動(dòng)缺失。
　　打印機(jī)出現(xiàn)工作不正常的原因：或者是配置不合理，或者是因?qū)Υ蛴C(jī)實(shí)施屏蔽而造成的。

INDRAMAT HDS03.2-W075N USPP HDS032W075N

ALLEN BRADLEY 702-EAB93 USPP 702EAB93

SQUARE D LAP36400MB NSFP LAP36400MB

Siemens 6ES5-430-4UA11 NSFP 6ES54304UA11

SIEMENS 6ES5 464-8ME11 6ES5464-8ME11

SIEMENS 6ES5431-6AA11 6ES5 431-6AA11 XLNT

Siemens S5 100U AC DIGITAL INPUT MODULE 6ES5 431 8MC11

Siemens 6ES7 407-0DA01-0AA0 6ES7407-0DA01-0AA0 FreeShip

Siemens Profibus PCI Card 6GK1561-1AA01 CP5611 in Sealed Box

ProSoft MVI56-MCM MVI56MCM Modbus Communication Interface Module QTY

HEYE-GLAS Output Interface 4501101300 SN-WEI 0557-2 Module Board

Vauxhall iPod iPhone Interface Adaptor Kit iConnect FM Stereo Modulator

Siemens 6AV6642-0DA01-1AX0 OP177B Membrane Keypad

Siemens LOGO 6ED1 052-2FB00-0BA6 6ED10522FB000BA6 NIB

Omron 3G2A3-OC221

Schneider Modicon AS-S911-800 ASS911800 Hot Standby Processor

Schneider Modicon AS-B827-032 INPUT MODULE 32 POINT 24VDC

Schneider Modicon AS-E908-131 ASE908131

Schneider Modicon Gould Micro 84 Controller AS M84A 005

Schneider Modicon AS-B882-032 OUTPUT MODULE ASB882032

Schneider Modicon POWER SUPPLY AS-P120-000 ~

SEALED SIEMENS CENTRAL PROCESSING UNIT 6ES7-414-2XG04-0AB0

Schneider Telemecanique ATV28HYU29M2 Inverter 1.5K/2HP

SIEMENSDIGITALOUTPUTMODULE6ES7222-1BF22-0XA0

Siemens 6AV6545-0BA15-2AX0 6AV6 545-0BA15-2AX0 SIMATIC TP 170A 6" Touch

SIEMENS Sinumerik 3 QDM-9WD-120 LCD Upgrade Kit

GE FANUC IC655CCM500C Communications Module IC655CCM500

SIEMENS -6SN1123-1AA00-0DA1

SIEMENS Sinumerik 6FC5111-0BA01-0AA0 E.Stand A Measuring Circuit Board

SIEMENS MOORE PRODUCTS 15881-30 1588130 3-CONDUCTOR POWER CABLE -

ALLEN-BRADLEY MICROLOGIX 1200 1762-OF4 4 CH. ANALOG OUTPUT MODULE SER QUANTITY

ab allen bradley 1336-b010-eod-l1 ac motor soft start drive 460v 380v 460v 10hp

AC Electric Motor Drive - 60 HP - 480 Volt - Three Phase Input

A06B-0501-B756 FANUC SERVO MOTORS REMANUFACTURED

75 HP Rotary Phase Converter with Digital Control

RELIANCE ELECTRIC 803602-SE USPP 803602SE

ALLEN BRADLEY 4100202L USPP 4100202L

ALLEN BRADLEY 1772-SD NSFP 1772SD

IMAJE ENM20332 NSFP ENM20332

XYCOM 9457-0238120011001 NSPP 945702381200110

TRICONEX 3603B USPP 3603B

HITACHI LINK-SH USPP LINKSH

Siemens 6ES5-242-1AA13 NSPP 6ES52421AA13

SIEMENS 6ES5 375-1LA41 6ES53751LA41

SIEMENS CPU 943 115U 6ES5 943-7UA11 6ES5943-7UA11

Siemens 6ES5 998-0MA23 NSFP 6ES59980MA23

Siemens 6ES5-460-7LA12 6ES5460-7LA12 ANALOG MODULE

Siemens MP270 6AV6542-0AH10-0AX0 Membrane Keypad

RELIANCE ELECTRIC 0-60031-4 NSPP 0600314

Texas Instruments 500-5032

Square D 8030 CRM255 SY/Max Interface Module in Box

Uryu Seisaku I/O Control Unit Module Card UEC-E200 I/0

Siemens C98043-A7010-L1

Modicon AS-W807-050

Schneider Modicon AS-BDAP-208 TSX Compact Discrete Output

Schneider Modicon B838 OUTPUT MODULE AS-B838-032

Schneider Modicon AS-BDAP-220 USPP ASBDAP220

Schneider Modicon AS-B885-101

Schneider Modicon /Gould AS-P452-012 Auxilliary Power Supply (UGC)

Schneider Modicon CABLE ASSEMBLY AS-W804-006 IN BOX

Schneider Modicon TSX08ED12F8

Schneider TSXAEY800 Input Module 8-Point

Redback PIM-500-E3 1 Port BNC E3 for SMS 500 90

Siemens 6ES5470-4UB12 Analog Output Module ~60 DAY WARRANTY~

SIEMENS Eprommodul ASM Sinumerik 800 6FX1821-1BX13-4C

Mitsubishi Melsec AJ71C24 Computer Link PLC Communication Module AJ71-C24

SIEMENS SIMODRIVE 6SN1112-1AC01-0AA1 UEB Ver.A QTY

SIEMENS SINUMERIK I/O MODULE 6FC5611-0CA01-0AA0

SIEMENS 6SN11236SN11456FC52106FC52036FC53576SN1118 repair

ALLENBRADLEY1746-NO8IANALOGOUTPUTMODULE1746NO8I1746-N08I

Allen Bradley SLC 500 DC Sink output module 1746-OV16 ser.C

ABB ROBOT SERVO 3HAB 5890-1/3

A06B-0143-B084#0008 FANUC SERVO MOTORS REMANUFACTURED

0020-23906 6" G-12 TIN W/B CLAMP RING

MODICON NW-0278-000 NSFP NW0278000

ALLEN BRADLEY 150-B135NBDB-8B NSFP 150B135NBDB8B

ALLEN BRADLEY 1326AB-B430E-21-K4L USPP 1326ABB430E21K4L

GENERAL ELECTRIC 12JBCG53K6A USPP 12JBCG53K6A

SQUARE D 9070-SK3000G2D1G13P1 NSFP 9070SK3000G2D1G1

SIEMENS 6RA7-025-6FV62-0-Z USPP 6RA70256FV620Z

ASEA BROWN BOVERI 264C901A07 NSFP 264C901A07

Siemens 6ES5 943-7UA22 6ES59437UA22

Siemens Simatic S5 6ES5 318-8MB13

SIEMENS 6ES5-700-1LA12 USPP 6ES57001LA12

Siemens 6ES5 453 6AC11 6ES54536AC11 BOXED

Siemens 6GK15511AA00 CP5511 6GK1 5511AA00 NIB FS

Siemens G85139-E1721-C883-C

SattCon 05-Slimline SDA module SatControl ABB

Square D B6.90

SIEMENS CERBERUS PYROTRONICS TRI-R INTERFACE MODULE

WATLOW 146D-1E1D-3100 TEMPERATURE CONTR 0-799'C 120VAC

Siemens 6SE70 CUCP Board A5E00444036

Siemens TP7 6AV3 607-1NH00-0AX0 Touchscreen Glass

Schneider Modicon DTA 202/AS-HDTA-202 DTA202ASHDTA202

Schneider Modicon AS-BADU-205 INPUT MODULE ASBADU205

Schneider Modicon AS-B832-016 OUTPUT MODULE 24VDC TRU LO OUT 16POINT ASB832016

Schneider Modicon DAU 202/AS-BDAU-202 DAU 202 / AS-BDAU-202

Schneider Modicon AS-W954-006 NSPP ASW954006

Schneider Modicon AS-H027-100 PLC

Schneider PLC Analog Output Module TM2AMO1HT

Siemens 6ES5430-7LA12 Input Module 22763

Roland VG-99 Mult System Effects Modeling Processor System V-Guitar

Siemens Coros Op 15 6AV3515-1EB00

SIEMENS SINUMERIK 840D/840Di/810D DIAGNOSTIC GUIDE MANUAL END USER DOCU NE

Reliance Electric Network Communications Module 57C404B

SIEMENS Circuit Board 6SN1118-0DG23-0AA0 Version A_6SN11180DG230AA0_462008.9200.

SIEMENS 1-230-1043A SIMODRIVE UEB MODULE INT/EXT

SIEMENS 6FC5110-0DB02-0AA2 6FC51100DB020AA2 version N

AllenBradley2711-T10C20/D2711T10C20Panelview1000MfgRefurbished

Allen Bradley Versaview 1700p Integrated Display Computer Catalog 6181-17TPXPH

ABB E-MAX SACE E3S-A 32 Circuit Breaker, 3200A Frame, 4 Pole, 3000A Trip w/ LSIG

Advanced Energy 3155162-020 RF Match F/R A Navigator 10013-L80, 27-265661-00 RF

(L26) 1 SOLARTRON SI 359595D POWER SUPPLY L26

LIEBERT 166517G2 NSFP 166517G2

ALLEN BRADLEY 1326AB-B720E-S2K7L NSPP 1326ABB720ES2K7L

GE FANUC 44C372657-G01 USPP 44C372657G01

FANUC A06B-6053-H022 USPP A06B6053H022

SICK OPTIC ELECTRONIC PLS101-312 USPP PLS101312

RELIANCE ELECTRIC 0-57026 NSFP 057026

SIEMENS 1FT5074-1AF71-4EG0 USPP 1FT50741AF714EG0

Siemens 6ES5 465-4UA13 -- 6ES54654UA13

Siemens 6ES5-942-7UB11 USPP 6ES59427UB11

SIEMENS 6ES5-433-7LA11 NSFP 6ES54337LA11

Siemens 6ES5 700-8MA11 6ES5700-8MA11 6ES57008MA11 WORKING TESTED BUS MODULE

Siemens S5 6ES5 700-8MA22 6ES57008MA22

Siemens C7-633 6ES7633-1DF02-0AE3 6ES76331DF020AE3 #2 ping Worldwide

SIEMENS 6ES5-380-7AA11 NSFP 6ES53807AA11

Square D 8020 SCP-111

NOSSIEMENS ADDRESSABLE INTERFACE MODULE 500-699484 500699484 FS-TRI-S

WS-C6503 CISCO CAT 6503 CHASSIS 3 4RU

SIEMENS 6ES7223-1HF00-0XA0

SIEMENS SIMATIC OP3 6AV3 503-1DB10 Operator Panel

Reliance 57C554

Schneider Modicon Dual AUTOMATION DEP216/AS-BDEP-216 In.Modules

Schneider Modicon AS-B371-001

Schneider Modicon Chassis AS-H819-103 - free ship

Schneider Modicon AS-BDAP-209 8PT OUTPUT MODULE

Schneider Modicon AS-B821-008 Input Module 10-60VDC 8POINT

MODICON AS-B804-116 OUTPUT MODULE 115VAC

Siemens Input Module 6ES5430-4UA13 430-4UA13

SIEMENS 6DS1302-8AB USPP 6DS13028AB

Siemens Output Module 6ES5451-4UA12 451-4UA12

SIEMENS SIMADYN OPERATOR PANEL 6DD1670-0AF0 IN BOX

Texas Instruments Remote Communications Module 560-2127 E19

SIEMENS 6SN1-118-0DK23-0AA0 DRIVE SIMODRIVE 611 DIGITAL CONTR LOOP H PERF

SIEMENS Simodrive 3 Phase Choke 6SN1111-0AA00-0BA1 Version D 6SN11110AA000BA1

SIEMENS 6FC5357-0BB21-0AE0 | 12mo warranty | Free EU Shipping | Inc UK VAT

Advantech PCM-3641 4-port RS-232 High-Speed Module FS

ALLEN-BRADLEY 1750-CA OUTPUT REGISTER MODULE SURPLUS

ABB Bailey Part No. YIEPAF02 Module Bailey 8613-22 Power Supply AC System

ADEPT TECH 10300-16500 USPP 1030016500

(#2934) Allen Bradley GuardMaster SafeZone Multizone Laser Scanner 442L-SFZNM

HONEYWELL TVMP-C0-80-AM0-E00-F10-0U000V-00 USPP TVMPC080AM0E00F1

TB WOODS WF2C4020-0N USPP WF2C40200N

DATAMYTE 953-07 USPP 95307

CONTROL TECHNIQUES UNI-2402 USPP UNI2402

PACIFIC SCIENTIFIC R67HENA-R2-NS-NV-00 NSFP R67HENAR2NSNV00

MODICON 92-00808-02 USPP 920080802

GETTYS DR-D005-001 NSFP DRD005001

Siemens 6ES5 308-3UB11 6ES53083UB11

Siemens 6ES5-524-3UA13 NSPP 6ES55243UA13

SIEMENS 6ES5-371-0AA51 MEMORY MODULE 6ES5-371-0AA51

Siemens 6ES5 101-8UX11 Expansion Unit BRAND

Siemens 6ES5-315-8MA11 I/O Buss Module

Siemens 6GK7 343-1EX11-0XE0 NIB

Siemens TP177B 6AV6 642-0BC01-1AX1 Touchscreen Glass

Siemens 6ES5700-8MA11

Kingspec Flash DOM Disk On Module 8GB/8G 44Pin Vertical IDE Interface PATA MLC

YASKAWA ELECTRIC JAMSC-B1075-1 USPP JAMSCB10751

SIEMENS 6ES7 222-1BF00-0XA0 6ES7222-1BF00-0XA0 FreeShip

SIEMENS OP270-6 6AV6542-0CA10-0AX1 Display Panel in Box

Red Lion GEM20000

Schneider Modicon AS-B824-000 PLC

Schneider Modicon AS-884A-101 CPU MODULE AS884A101

Schneider Modicon AS-P110-000 USPP ASP110000

Schneider Modicon AS-B233-501

Schneider Modicon AS-516P-006 Processor Board Rev C21 AIPR/UVG

Modicon XBTF024610 Magelis Operator Interface XBT F024610 24VDC PV: 20 V2.2 1850

Siemens Simatic S7-300 Analog Input module SM331 8x12BIT 6ES7331-7KF01-0AB0

Telemecanique Time Off Delay Block LA2 DT2 0,1-30s

Siemens Simatic S5 6ES5 454-7LA11 6ES54547LA11 Output Module

SIEMENS / TI 505-4732 DC DISCRETE OUTPUT MODULE

SIEMENS SINUMERIK ELECTRONIC HANDWHEEL NIB

SIEMENS 6SN1118-0AD11-0AA1 6SN1 118-0AD11-0AA1 SIMODRIVE 611 Control Board

SIEMENS SIMODRIVE 6SN1123-1AB00-0BA1 with 6SN1118-0AE11-0AA1

SIEMENS MEMORY CARD 6FC5250-6BX10-2AH0

Advantech PCM-3350

Allen-Bradley 2711-K9A1Series C MINT

ABB 57520001GD1 NNB

ACOPIAN R24W7AHMS USPP R24W7AHMS

Aaronia Spectran NF5035 Spectrum Analyzer -

8510A-A06-A1 ALLEN BRADLEY CONTROLLERS

SIEMENS 6RA2-477-6GV62-0 USPP 6RA24776GV620

ASEA BROWN BOVERI YTE-102C USPP YTE102C

ASEA BROWN BOVERI ACH401603032A0BE0000 USPP ACH401603032A0B1

MITSUBISHI MDS-B-SP-550 NSPP MDSBSP550

INDRAMAT MAC112B-N-030-N7L-130PBD USPP MAC112BN030N7L13

AMP 220144-1 USPP 2201441

TECH MOTIVE TOOL 485780-S28171 NSPP 485780S28171

Siemens 6ES5-435-7LB11 USPP 6ES54357LB11

SIEMENS 6ES5 482-8MA11 6ES54828MA11

SIEMENS S5 6ES5 090-8MA01 6ES50908MA01

Siemens S5 6ES5 433-8MA11 6ES54338MA11 Digital Input

Siemens 6ES7 431-1KT10-0AB0 6ES7431-1KT10-0AB0

Siemens RWR490.40/MCQ McQuay over 95%

Pro Audio/Video System w/CPU Consblation Console

HONEYWELL 51304362-300 INTERFACE MODULE 51304362300

VISTEON SERIAL INTERFACE MODULE 4042591/AB-9492-E.0

Siemens 6AV8 100-0BC00-1AA1 Membrane Keypad FreShip

Siemens LOGO! 12/24RC 6ED1052-1MD00-0BA2

Omron 3G2A5-LK009

Schneider Modicon AS-P464-002/ASP464002 Monitor with control

Schneider Modicon AS-S908-021 Remote I/O Processor REV. B - Refurbished

Schneider Modicon AS-H810-208 NSPP ASH810208

Schneider Modicon Gould Remote I/O Processor AS-P451-622_ASP451622

Schneider Modicon AS-BDAP-210 OUTPUT MODULE

Schneider Modicon PROGRAMMABLE CONTROLLER PC-0984-385 PROM ID AS-C950-110

Telemecanique ATV58HD64N4X 45KW Inverter

Schneider Telemecanique Inverter ATV31H018M2A 0.18KW

Siemens6ES7132-4HB00-0AB0SimaticS7OutputModulewithTerminalBase

Siemens 6AV6 545-0CA10-0AX0 6AV6545-0CA10-0AX0 SIMATIC TP270 6 Touch Panel READ

SIEMENS SINUMERIK 6FC3538-3EF 6FC35383EF

GE FANUC HE693IBS100D INTERBUS-S COMMUNICATIONS MODULE

SIEMENS SIMODRIVE 611 – 6SN1118-0BJ11-0AA0 CONTROLLER