KJ1501X1-BB1

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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！
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Email：[email protected]

描述

KJ1501X1-BB1

故障站的自動(dòng)脫離和旁路。任何一個(gè)節(jié)點(diǎn)的故障都不會(huì)影響整個(gè)網(wǎng)絡(luò)的通訊暢通，該故障節(jié)點(diǎn)應(yīng)該自動(dòng)脫離和旁路。一旦故障排除，該節(jié)點(diǎn)能夠自動(dòng)恢復(fù)整個(gè)網(wǎng)絡(luò)的數(shù)據(jù)通訊。
通訊處理器和控制處理器分離。在一些系統(tǒng)中，控制處理器和通訊處理器是完全兩個(gè)獨(dú)立的處理器，二者各司其職，不存在相互影響，這樣即可以確?？刂茊呜５目刂扑惴ǖ捻憫?yīng)速度，同時(shí)又可以保證網(wǎng)絡(luò)通訊的實(shí)時(shí)性和安全性，避免因網(wǎng)絡(luò)通訊故障導(dǎo)至控制響應(yīng)速度變慢或者因控制算法復(fù)雜而影響網(wǎng)絡(luò)的有效傳輸。
除此之外，采用開(kāi)放性的網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)和通訊協(xié)議也是提高整個(gè)系統(tǒng)可靠性的重要措施。在早期DCS系統(tǒng)中，由于普通網(wǎng)絡(luò)系統(tǒng)和通訊協(xié)議很難滿足要求，許多廠商都開(kāi)發(fā)了專有通訊系統(tǒng)和專用通訊協(xié)議，但其最大缺點(diǎn)就是其專用性，廠商之間相互封閉，其可靠性需要廠商自己不斷完善和發(fā)展，因此導(dǎo)致開(kāi)發(fā)成本很高。隨著計(jì)算機(jī)網(wǎng)絡(luò)技術(shù)的迅猛發(fā)展，IEC8802.x，（（與人們熟悉的IEEE802.x標(biāo)準(zhǔn)相對(duì)應(yīng)）系列標(biāo)準(zhǔn)相繼推出，通用計(jì)算機(jī)網(wǎng)絡(luò)的性能和可靠性不斷提高，而價(jià)格迅速下降。在這種趨勢(shì)下，主要DCS廠商都紛紛放棄發(fā)展自己獨(dú)有網(wǎng)絡(luò)產(chǎn)品的做法，轉(zhuǎn)而采用通用計(jì)算機(jī)網(wǎng)絡(luò)結(jié)構(gòu)和相關(guān)軟硬件產(chǎn)品。在這方面最為典型的例子就是FDDI網(wǎng)絡(luò)在控制網(wǎng)絡(luò)中的使用，由于FDDI被設(shè)計(jì)用于骨干高速網(wǎng)絡(luò)，與生俱來(lái)的雙環(huán)拓?fù)浣Y(jié)構(gòu)使其不僅具有冗余特性，而且具有容錯(cuò)特點(diǎn)，即使在雙環(huán)同時(shí)斷開(kāi)時(shí)仍然能夠維持整個(gè)系統(tǒng)的正常通訊，這些FDDI標(biāo)準(zhǔn)特性使得廠商不需要自己?jiǎn)为?dú)設(shè)計(jì)冗余控制網(wǎng)絡(luò)之間的無(wú)擾切換系統(tǒng)。與此同時(shí)，由于FDDI網(wǎng)絡(luò)被設(shè)計(jì)用于骨干網(wǎng)，因此具有大量標(biāo)準(zhǔn)硬件與常規(guī)的以太網(wǎng)和令牌網(wǎng)等互連，從而具有很好的開(kāi)放性和很高的可靠性。
開(kāi)放型網(wǎng)絡(luò)給DCS廠商帶來(lái)的最大好處就是系統(tǒng)的開(kāi)放性和可靠性得到顯著增強(qiáng)，這是因?yàn)橥ㄓ嶎I(lǐng)域?qū)I(yè)領(lǐng)導(dǎo)廠商的技術(shù)力量雄厚，其通訊系統(tǒng)軟硬件產(chǎn)品的可靠性和開(kāi)放性在長(zhǎng)期使用中得到了充分驗(yàn)證。通過(guò)采用開(kāi)放型通訊系統(tǒng)，DCS系統(tǒng)提供了不同廠商軟硬件產(chǎn)品互操作的可能性，有利于用戶在更大范圍內(nèi)自由選擇相關(guān)產(chǎn)品從而達(dá)到更優(yōu)的性能價(jià)格比。最為成功的例子就是現(xiàn)場(chǎng)總線技術(shù)的出現(xiàn)和以太網(wǎng)技術(shù)在工業(yè)控制中的應(yīng)用?？梢哉f(shuō)，DCS系統(tǒng)的開(kāi)放性也逐漸成為一個(gè)越來(lái)越重要的指標(biāo)。采用開(kāi)放型系統(tǒng)還有一個(gè)附加好處，那就是有效降低了廠商的研發(fā)成本，加速了產(chǎn)品的更新?lián)Q代。

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
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RELIANCE 0-49040-A RECTIFIER MODULE ***XLNT**

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，?？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(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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