1746-QS

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描述

1746-QS

它是工作、備用部件之間實(shí)現(xiàn)無擾動(Bumpless)切換技術(shù)的前提,只有按控制實(shí)時性要求進(jìn)行高速有效的信息同步,保證工作、備用部件步調(diào)一致地工作,才能實(shí)現(xiàn)冗余部件之間的無擾動切換。
? ? 在熱備用工作方式下,其中一塊處于工作狀態(tài)(工作卡),實(shí)現(xiàn)系統(tǒng)的數(shù)據(jù)采集、運(yùn)算、控制輸出、網(wǎng)絡(luò)通訊等功能;而另一塊處于備用狀態(tài)(備用卡),它實(shí)時跟蹤工作卡的內(nèi)部控制狀態(tài)(即狀態(tài)同步)。工作/備用卡件之間的正/負(fù)邏輯是互斥的,即一個為工作卡,另一個必定是備用卡;而且它們之間有冗余控制電路(又稱工作/備用控制電路)和信息通訊電路,以協(xié)調(diào)兩塊卡件同時而且有序地運(yùn)行,保證對外輸入輸出特性的同一性,即對于用戶使用而言,可以認(rèn)為只有一個部件。一般在設(shè)計中,工作、備用部件之間通過高速的冗余通訊通道(串行或并行)實(shí)現(xiàn)運(yùn)行狀態(tài)互檢和控制狀態(tài)的同步(如組態(tài)信息、輸出閥位、控制參數(shù)等)。
? ? 2)故障檢測技術(shù)
? ? 為了保證系統(tǒng)在出現(xiàn)故障時及時將冗余部分投入工作,必須有高精確的在線故障檢測技術(shù),實(shí)現(xiàn)故障發(fā)現(xiàn)、故障定位、故障隔離和故障報警。故障檢測包括電源、微處理器、數(shù)據(jù)通訊鏈路、數(shù)據(jù)總線及I/O狀態(tài)等。其中故障診斷包括故障自診斷和故障互檢(工作、備用卡件之間的相互檢查)
? ? 3)故障仲裁技術(shù)和切換技術(shù)
? ? 精確及時地發(fā)現(xiàn)故障后,還需要及時確定故障的部位、分析故障的嚴(yán)重性,依賴前文提到的冗余控制電路,對工作、備用故障狀態(tài)進(jìn)行分析、比較和仲裁,以判定是否需要進(jìn)行工作/備用之間的狀態(tài)切換??刂茩?quán)切換到冗余備用部件還必須保證快速、安全、無擾動。當(dāng)處于工作狀態(tài)的部件出現(xiàn)故障(斷電、復(fù)位、軟件故障、硬件故障等)或者工作部件的故障較備用部件嚴(yán)重時,備用部件必須快速地?zé)o擾動地接替工作部件的所有控制任務(wù),對現(xiàn)場控制不造成任何影響。同時要求切換時間應(yīng)為毫秒級,甚至是微秒級,這樣就不會因?yàn)樵摬考墓收隙斐赏獠靠刂茖ο蟮氖Э鼗驒z測信息失效等等。另外,還需要盡快通過網(wǎng)絡(luò)通訊或就地LED顯示進(jìn)行報警,通知用戶出現(xiàn)故障的部件和故障情況,以便進(jìn)行及時維護(hù)。

產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價格,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
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? 國內(nèi)實(shí)力庫存商家

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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? 國內(nèi)實(shí)力庫存商家


選擇深圳長欣,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”(不管能不能看懂,先了解個大概,以便學(xué)習(xí)編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(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(最好是有個物理回路驗(yàn)證,比如變頻器+電機(jī)+測速傳感器);
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)會一種至于其它的學(xué)習(xí)起來也就簡單了。