REM610C55HCNR01

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描述

REM610C55HCNR01

基于ARM的分布處理單元的結(jié)構(gòu)框圖見(jiàn)圖2，這和一般的分布處理單元的結(jié)構(gòu)非常相似。這里主要把處理單元分為6部分：ARM控制器、上層網(wǎng)絡(luò)模塊、電源管理模塊、存儲(chǔ)器模塊、低層網(wǎng)絡(luò)模塊和時(shí)鐘模塊。ARM控制器和存儲(chǔ)模塊組成了最基本的嵌入式系統(tǒng)，整個(gè)DCS控制系統(tǒng)的數(shù)據(jù)處理和控制策略都是在這里處理的。上層網(wǎng)絡(luò)模塊主要是指和管理層通信的主/冗余網(wǎng)絡(luò)和一個(gè)實(shí)現(xiàn)主/冗余分布處理單元進(jìn)行數(shù)據(jù)交換的網(wǎng)絡(luò)，這部分的主要功能是完成管理層對(duì)DCS控制系統(tǒng)的實(shí)時(shí)檢測(cè)和實(shí)現(xiàn)主/冗余分布處理單元的數(shù)據(jù)冗余。底層的網(wǎng)絡(luò)模塊是由分為主次的2條485網(wǎng)絡(luò)組成，此模塊主要實(shí)現(xiàn)ARM控制器的I/O卡件之間的數(shù)據(jù)通信。存儲(chǔ)器模塊可分為兩部分，一部分用來(lái)管理存放操作系統(tǒng)，另一部分用來(lái)管理存放實(shí)時(shí)數(shù)據(jù)。電源模塊和時(shí)鐘模塊分別實(shí)現(xiàn)電源的管理和時(shí)鐘的管理。冗余分布處理單元的工作原理：兩個(gè)分布處理單元硬件配置完全相同，內(nèi)部裝有相同的操作系統(tǒng)，相同的組態(tài)軟件，相同的組態(tài)信息。在同一時(shí)刻只有1個(gè)分布處理單元通過(guò)雙機(jī)交換卡接受過(guò)程信息并進(jìn)行運(yùn)算處理，最后產(chǎn)生控制結(jié)構(gòu)去控制過(guò)程設(shè)備，此分布處理單元稱為主分布處理單元。同時(shí)冗余分布處理單元并沒(méi)有閑置，它在每一個(gè)工作周期都通過(guò)雙機(jī)之間的光纖對(duì)主分布處理單元所接受的過(guò)程信息和運(yùn)算結(jié)果進(jìn)行實(shí)時(shí)拷貝，這樣冗余分布處理單元始終與主分布處理單元同步。冗余分布處理單元同時(shí)檢測(cè)拷貝的信息是否完整，是否在所允許的容錯(cuò)度內(nèi)。一旦信息不完整或報(bào)錯(cuò)，則說(shuō)明主分布處理單元工作不正常。在這種情況下，冗余分布處理單元通過(guò)光纖將主分布處理單元旁路，同時(shí)切換為主分布處理單元繼續(xù)工作。切換時(shí)間選用最短的運(yùn)算周期（幾十ms或更短），從而實(shí)現(xiàn)無(wú)擾動(dòng)切換。等到主分布處理單元恢復(fù)正常后，冗余分布處理單元自動(dòng)把控制權(quán)交還給主分布處理單元，轉(zhuǎn)為冗余備份狀態(tài)。

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(lè)。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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專業(yè)銷售進(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，福克斯波羅、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(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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