Allied Telesyn AT-MC15

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描述

Allied Telesyn AT-MC15

PLC與DCS的前景
我們已經(jīng)知道有的FCS是由PLC發(fā)展而來,而有的FCS是由DCS發(fā)展而來,那么,今天FCS已走向?qū)嵱没?,PLC與DCS前景又將如何。
PLC于60年代末期在美國(guó)首先出現(xiàn),目的是用來取代繼電器,執(zhí)行邏輯、計(jì)時(shí)、計(jì)數(shù)等順序控制功能,建立柔性程序控制系統(tǒng)。1976年正式命名,并給予定義:PLC是一種數(shù)字控制專用電子計(jì)算機(jī),它使用了可編程序存儲(chǔ)器儲(chǔ)存指令,執(zhí)行諸如邏輯、順序、計(jì)時(shí)、計(jì)數(shù)與演算等功能,并通過模擬和數(shù)字輸入、輸出等組件,控制各種機(jī)械或工作程序。經(jīng)過30多年的發(fā)展,PLC已十分成熟與完善,并開發(fā)了模擬量閉環(huán)控制功能。PLC在FCS系統(tǒng)中的地位似乎已被確定并無多少爭(zhēng)論。IEC推薦的現(xiàn)場(chǎng)總線控制系統(tǒng)體系結(jié)構(gòu),PLC作為一個(gè)站掛在高速總線上。編者以為,輔助車間的控制系統(tǒng)應(yīng)以遵循現(xiàn)場(chǎng)總線通訊協(xié)議的PLC或能與FCS進(jìn)行通訊交換信息的PLC為優(yōu)選象。
自1973年提出第一臺(tái)以微處理器為基礎(chǔ)的控制器以來,它逐步完善,并最終形成功能齊全、安全可*的數(shù)字式分散控制系統(tǒng)DCS。它的性能大大優(yōu)于以住任何一種控制系統(tǒng)??梢詽M足火電廠DAS、MCS、SCS和APS各系統(tǒng)的各種要求,目前還可以通過工業(yè)以太網(wǎng)建立管理層網(wǎng)絡(luò),以滿足火電廠呼聲越來越高的加強(qiáng)管理的要求??梢赃@樣說,DCS系統(tǒng)的監(jiān)控可以復(fù)蓋大型火電機(jī)組的工藝全過程。
但是,自從有了FCS,并于90年代走向?qū)嵱没詠?,不斷有如下論點(diǎn)在公開刊物上發(fā)表,即:“從現(xiàn)在起,新的現(xiàn)場(chǎng)總線控制系統(tǒng)FCS將逐步取代傳統(tǒng)的DCS”;“當(dāng)調(diào)節(jié)功能下放到現(xiàn)場(chǎng)去以后,傳統(tǒng)的DCS就沒有存在的必要而會(huì)自動(dòng)消失”;“今后十年,傳統(tǒng)的4~20mA模擬信號(hào)制將逐步被雙向數(shù)字通信現(xiàn)場(chǎng)總線信號(hào)制所取代,模擬與數(shù)字的分散型控制系統(tǒng)DCS將更新?lián)Q代為全數(shù)字現(xiàn)場(chǎng)總線控制系統(tǒng)FCS”……。這些論點(diǎn)歸納為一句話:FCS將取代DCS,DCS從此將消亡。

產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢(shì)價(jià)格,大量現(xiàn)貨。

主營(yíng)DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌:ABB???,AB??,GE,FOXBORO,本特利,英維思,伍德沃德,西屋,瑞恩,施耐德,西門子,摩托羅拉,安川。力士樂。ACSO,橫河等進(jìn)口品牌。 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國(guó)內(nèi)實(shí)力庫(kù)存商家

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SPECTRA PHYSICS 164 ION LASER/265 POWER SUPPLY EXCITER

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Dionex BioLC System Wavelength Detector Reagent Module

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Force SYS68K/CPU-33B/?4 VME Board CAT#: 510098

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Panametrics XMT868-2-11-TO-?0011 Transmitter UPT868

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IEC Micromax Refrigerated Microcentrifuge B135

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Telemecanique LC1F1154 Contactor 600VAC 200AMP

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Ransco 924-1-4-D-0-120?/60 Temp Test Chamber w/ IEEE 488

Primera Technology Bravo II CD/DVD Disc Publisher New

Omron STI MiniSafe MS4300B-2 Safety Light Curtain Set

Motorola 3520 Standalone DSU MVME946C Chassis MVME 712B

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GE Fanuc QPI31200E2P Total Control MONO 9” QuickPanel

L-3 Communications BSM720-PC Bit Synchronizer Board

Bertan 210-10N HV Power Supply WORKS GUARANTEED 30DAYS!

DataCube MaxBox 20-Slot, 6 UVME Card Cage w/ 750W Power

Quanta CG Character Generator QCG-304 & QuantaFont

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Adtran TSU 600e Modular 1/FT1 Multiplexer PN: 1202076L1

Omron 3G8B2-Z8040 MA010 CS001 NI021 NO020 PS000 PLC Rac

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Omron 3G8B2-Z8040 MA010 CS001 NI021 NO020 PS000 PLC Rac

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Insite IG Model 2000 Dual Channel Mixed Liquor Analyzer

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Precision Filter VMF08 VMF08-F8011-TD6?B Octal Filter

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Precision Filter VMF08 VMF08-F8705-LP1 Octal Filter VME

Ironics IV-3272 PIO Parallel Interface DMA High Speed

VMIC VMIVME-5530S Fiber Optic Slave VMI VMEbus VME5530S

Motorola MVME 147-023 MVME147-023 Single VME Board

Proxima DP2810 True-Color Multimedia Desktop Projector

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FISHER SCIENTIFIC 9110 ISOPTEMP CIRCULATOR BATH

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Hepco C7600-ACT Dip Lead Cutter

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ASI Astrosystems Durapot HDC34-1/36-24 Transducer

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Elma 32VS-0413-T07J1?2-P250 Type 32 Portable VME Chassis

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Fujitsu FC9607MPD1 Microprocessor FLM 2400 ADM

CCS LFV2-100RD LFV Series Coaxial Lights for LED Lights

National Instruments (NI) VME-MXI-2 VMEbus Extender VME

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Hewlett Packard HP A6795A 2Gbps PCI Fibre Channel

IMED Gemini PC-1 Volumetric Infusion Pump w/ Controller

Allen Bradley 1771-DA/A 1771-DAA ASCII I/O Module

Alliance Sys CSU DSU Adit 600 TDM Control FXS Modules

Parker Bayside GR090-X1A1X-001 Right Angle Gearmotor

VAT 24344-QA11 w/ 24344-QA41 Vacuum Angle Valve

IDC RD1205A-12-MS5-?MC-Q Rodless Actuator Ball Screw

Novellus CMP 676 Polisher Ind Computer SpeedFam C2C

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Beckman DU-40 DU40 Spectrophotomet?er

Systems Intergration + Inc. 5-Solt VME Tower Enclosure

Force SYS68K/ISIO-2 I/O Controller Board PN: 310031

Markem 526 Marking Machine w/ Footswitch

Markem 527 Automatic Offset Marking Printing Machine

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Motorola Phone Line Interface PLIB-1Telecom Networking

Duplo DF-520 Automatic Paper Folder Folding Machine

Zenith ATSC Professional Decoder System DTVDECODER-H

Furon CDV2-F88NC & SMDV-FF16M-L-P Valve Assy w/ Manifol

Instrumentation Labs ILL 443 Digital Flame Photometer

Motorola MVME181-1 MVME 181-1 VME Module

3M ScotchFlex Assembly Press Model 3339-1 w/ 3442-1

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Therakos UVAR Photopheresis System Johnson & Johnson

T.C. Jarrett Embedding Curing Oven & Cut-Off Machine

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Sigma Systems 52/80AC Environmental Test Chamber WORKS!

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FTS Systems Flexi-Cool FC-100 Refrigeration Chiller

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Hybaid OmniGene TR3 CM110 Thermal Cycler

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Bio-Tek Instruments EL311 Microplate Auto Reader

LKB Pharmacia 4050 Ultrospec II UV/VIS Spectrophotomet?e

Adtran Itres VME IBM FXO U-Brite Module Boards + (10)

BECTON DICKINSON FACS MATE IMMUNOCYTOMETRY SAMPLE SYSTE

General Micro Systems GMS GMSV46-01D CSMA VME Board

CANON F910600 FILM SCANNER

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DATEL DVME-622B 8/16-CHANNEL FAST SIMULTANEOUS VMEbus

FARRALL INSTRUMENTS SP-300A PHYSIOLOGICAL RECORDER

GASTECH FOUR-RUNNER GX-4000 GAS DETECTOR

GASTECH SAFE TOXIC GAS ALARM 4700 DETECTOR GASTECTOR

Sun 560-2091-05 StorEdge Ultra2 UltraComputing Software

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Datacom Inc. Communication Processor

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Met One 203-115-1 Facility Particle Counting System 203

Met One POINT 5 .5D-2-1 Particle Counter

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Toshiba Board TABLE CONT. Board PN: PX14-33275G

Western Atlas 3506 Analog VME Board PN: M145992

Western Atlas WTS 5710XC Hi-Speed A/D Converter Card

PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國(guó)內(nèi)實(shí)力庫(kù)存商家


選擇深圳長(zhǎng)欣,選擇放心,售后無憂大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
主營(yíng):本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點(diǎn)經(jīng)驗(yàn)。
1、先通讀一遍“系統(tǒng)手冊(cè)”(不管能不能看懂,先了解個(gè)大概,以便學(xué)習(xí)編程時(shí)查找);
2、由位控邏輯入手,逐漸增加定時(shí)、計(jì)數(shù)等條件,把或、與、非關(guān)系理順;
3、進(jìn)而練習(xí)整數(shù)運(yùn)算、實(shí)數(shù)運(yùn)算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個(gè)物理回路驗(yàn)證,比如變頻器+電機(jī)+測(cè)速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時(shí)也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機(jī)器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動(dòng)器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學(xué)會(huì)一種至于其它的學(xué)習(xí)起來也就簡(jiǎn)單了。