1394C-AM50

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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！
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描述

1394C-AM50

PLC在中國的發(fā)展
在中國，大約從1974、75年在北京和上海開始開發(fā)采用位片式微處理芯片的可編程順序控制器，并有所應(yīng)用。但一直未能形成批量生產(chǎn)。在改革開放剛起步的1979年，在當(dāng)時(shí)的機(jī)械部?jī)x表局的推動(dòng)下，開始從美國MODICON引進(jìn)起584的PLC，并首先在電站的輔機(jī)如輸煤、除灰除渣、水處理系統(tǒng)以及水泥廠等控制系統(tǒng)中成功應(yīng)用，從而大大推動(dòng)了PLC在我國工業(yè)的大規(guī)模運(yùn)用。遺憾的是，花了很大一筆外匯的這個(gè)項(xiàng)目并不曾形成良性的有后續(xù)的發(fā)展。
自1985年開始，小型PLC首先是日本三菱電機(jī)公司的MELSEC-F，通過非政府渠道進(jìn)入中國市場(chǎng)。不到三、四年時(shí)間，小型PLC就形成了大面積的推廣應(yīng)用局面。1990年以后，Siemens、Allen Bradley以及其它知名品牌開始大舉進(jìn)入中國市場(chǎng)，占據(jù)中、大型的PLC的較大份額。1995年后形成了大型PLC以歐美為主、中型PLC歐美和日本平分秋色、小型PLC則以日本為主、Siemens也步步緊逼的格局。至今沒有很大改變。
由上簡(jiǎn)要回顧可知， PLC在中國已經(jīng)形成了規(guī)模巨大的應(yīng)用市場(chǎng)，但并未建立批量生產(chǎn)、有持續(xù)開發(fā)發(fā)展能力的PLC制造業(yè)。
應(yīng)指出的是：
在國內(nèi)，PLC的應(yīng)用水平還是不低的，自主設(shè)計(jì)、系統(tǒng)集成和現(xiàn)場(chǎng)投運(yùn)的能力，可以說與國際主流水平同步；
PLC的應(yīng)用領(lǐng)域也很廣泛，覆蓋冶金、電力、化工、石油化工、機(jī)械、輕工、電子、電工、建材水泥等工業(yè)，以及現(xiàn)代農(nóng)業(yè)機(jī)械和其它應(yīng)用。近年來環(huán)保工業(yè)也有廣泛應(yīng)用，發(fā)展勢(shì)頭很猛。
在國內(nèi)有一支龐大的PLC銷售、服務(wù)、應(yīng)用、系統(tǒng)集成隊(duì)伍，遍布除西藏外的全國各地。

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DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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BR-48000-R0000 Brocade Silkworm 48000 Chassis cont, pwr

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XBR-MENTPOD8-01 Brocade Silkworm 5300 16 Port Upgrade

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Brocade SilkWorm BR-7500-0001 4Gb Fibre Channel Switch

Brocade BR-4140 SilkWorm 4100 32-Ports SAN FC Switch

BROCADE SILKWORM 5000 BR-5040 32-PORT 4GB SAN SWITCH

XBR-MIDRPOD8-01 Brocade Silkworm 5100 8 Pt Upgrd 8G SFP

Brocade Silkworm 3900 32Port Fabric Switch BR-3902-0001

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Brocade BR-4120 SilkWorm 4100 32-Ports SAN FC Switch

BR-MIDRPOD-01 Brocade Silkworm 5000 4100 8 Port POD Upg

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1 Year Brocade Silkworm Maintenance Support 4900 Series

Brocade SilkWorm 3900 Enterprise Fibre Switch Refurb

Brocade 2 Gbit/sec SilkWorm 3900 32-Ports SAN FC Switch

Dell 0G7542 Brocade Silkworm 3250 FC 8 Port Switch

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Brocade Silkworm 3900 SAN Fibre Switch 32-Port w/SFPs

BR-3900TRK-02 Brocade Silkworm 4100 5000 ISL Trunking

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Brocade Silkworm 3900 3902 32-Port SG-XSWBRO3900 Fiber

Brocade SilkWorm 3800 BR-3802-0011 16.0 Ports Fiber

Brocade 2 Gbit/sec SilkWorm 3800 32-Ports SAN FC Switch

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XBR-SMEDPOD4-01 Brocade Silkworm 300 8 Port Upgd 8 SFPs

2x Brocade 200E SilkWorm 16-Port 4Gb/s Fibre SAN Switch

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Brocade Silkworm 3200 Fibre Channel Switch FC w/8 GBICs

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Brocade Silkworm 2800 16Port 100MB/s FC Switch BR-2802

EMC DS-4100B Brocade Silkworm 32-Port Fibre Switch

Brocade Silkworm BR-2250 16-Port Switch

Brocade Silkworm 4100 16 Port ACTIVE 4Gb FC Switch

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Brocade Silkworm 2050 8-Port Switch BR-2050-0001

1 Year Brocade Silkworm Maintenance Support 5000 Series

Dell Brocade Silkworm 3800 16-Port FC Switch Unit 2R411

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Brocade Silkworm 12000 with 48 Port Dual Configuration

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Brocade SilkWorm 3250 8-Port Fibre Channel Switch New

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Brocade Silkworm 4100, 32-port with 32 sfp’s Installed

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Brocade SilkWorm 2800 Fiber Switch 16 Port NO PASS

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BR-3802-0001 Brocade Silkworm 3800 16 ports, 2Gb SFPs

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BROCADE DS-200B SilkWorm 200E 4GB Switch 16-Ports

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2 Qty Brocade Silkworm 3900 32 port Switch w sfp/rails

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1 Year Brocade Silkworm Maintenance Support 200E Series
1-5 Year Extended Service “Advance Replacement Support”

Brocade SilkWorm 3014 FC Switch PowerEdge 1855 SW3014
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BROCADE SILKWORM 2800 FIBRE CHANNEL SWITCH WITH GBIC
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BROCADE SILKWORM 3200 VL2 * 8 CHANNEL FIBER SWITCH

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Enlarge
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Brocade SilkWorm 24000 16-Port Blade 60-1002121-04
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Brocade Silkworm 3800

Brocade SilkWorm 3800 Power Sup 60-0000212-01, SP471-1A

Brocade Silkworm 2240 Fibre Channel Switch 21H9837 GBIC

Brocade Silkworm 3200 / NetApp NA-3200-0000 no SFP’s

Brocade SilkWorm 3900 Fan Assembly Tray New Pull

SilkWorm Brocade 3200 Fibre Channel Switch (1508137)

Brocade SilkWorm 2800 Fibre Channel 16 Port Switch

BROCADE SILKWORM 3900 POWER SUPPLY 60-0000739-02

Brocade SilkWorm 3200 Fibre Channel Switch BR-3200 Ref.


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：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。

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