A2H254-16

分類(lèi)：
選擇深圳長(zhǎng)欣，選擇放心，售后無(wú)憂(yōu)
大量現(xiàn)貨，當(dāng)天順豐發(fā)貨！
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描述

A2H254-16

? 數(shù)據(jù)經(jīng)DTU發(fā)送到移動(dòng)GPRS網(wǎng)絡(luò)上的CGSN后，移動(dòng)的GPRS網(wǎng)絡(luò)與Internet有通道接口，因此，移動(dòng)CGSN服務(wù)器可將數(shù)據(jù)經(jīng)Internet再轉(zhuǎn)發(fā)到數(shù)據(jù)中心服務(wù)器或者是路由器上。為了保證數(shù)據(jù)在移動(dòng)網(wǎng)絡(luò)到數(shù)據(jù)中心路由器之間傳輸?shù)陌踩?，筆者使用了VPN功能。該功能在數(shù)據(jù)中心路由器和移動(dòng)出口網(wǎng)關(guān)服務(wù)器之間建立VPN的GRE隧道，保證這兩點(diǎn)之間數(shù)據(jù)傳輸?shù)陌踩?，不被他人在中途進(jìn)行信息竊取、修改。
? ? 移動(dòng)GPRS網(wǎng)絡(luò)傳輸送來(lái)的各換熱站數(shù)據(jù)經(jīng)Internet，通過(guò)ADSLModem信號(hào)解調(diào)經(jīng)防火墻檢測(cè)后送達(dá)路由器VPN解密后，再將解密后的數(shù)據(jù)包轉(zhuǎn)發(fā)到指定的數(shù)據(jù)中心服務(wù)器上進(jìn)行數(shù)據(jù)接收處理，與此同時(shí)數(shù)據(jù)中心服務(wù)器擔(dān)負(fù)著向各換熱站發(fā)送相應(yīng)控制指令數(shù)據(jù)的任務(wù)。各客戶(hù)機(jī)從數(shù)據(jù)中心服務(wù)器上取得數(shù)據(jù)在各自的人機(jī)界面軟件上完成對(duì)各換熱站的監(jiān)視控制、報(bào)警、歷史曲線等功能。
? ? 此外，在調(diào)度中心網(wǎng)絡(luò)中，網(wǎng)關(guān)機(jī)與全廠MIS網(wǎng)絡(luò)連接，負(fù)責(zé)把熱網(wǎng)的各種運(yùn)行參數(shù)送到MIS網(wǎng)上，供上一級(jí)相應(yīng)MIS軟件完成數(shù)據(jù)分析、數(shù)據(jù)挖掘等功能，大大提高熱網(wǎng)運(yùn)行的經(jīng)濟(jì)性。在這里，網(wǎng)關(guān)機(jī)與MIS網(wǎng)數(shù)據(jù)服務(wù)器的數(shù)據(jù)接口選用OPC，該接口使用方便、調(diào)試配置十分簡(jiǎn)單。

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(mén)子，摩托羅拉，安川。力士樂(lè)。ACSO，橫河等進(jìn)口品牌。 專(zhuān)業(yè)銷(xiāo)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(zhuān)業(yè)銷(xiāo)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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專(zhuān)業(yè)銷(xiāo)售進(jìn)口DCS? PLC系統(tǒng)備件模塊

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(wú)憂(yōu)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(mén)子、摩托羅拉、GE發(fā)那科、安川、博世力士樂(lè)，ACSO，力士樂(lè)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(lèi)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(lái)也就簡(jiǎn)單了。

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