6AV6643-0AA01-1AX0

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描述

6AV6643-0AA01-1AX0

?PLC的存儲(chǔ)器分為系統(tǒng)程序存儲(chǔ)器和用戶程序存儲(chǔ)器。系統(tǒng)程序相當(dāng)于個(gè)人計(jì)算機(jī)的操作系統(tǒng)，它使PLC具有基本的智能，能夠完成PLC設(shè)計(jì)者規(guī)定的各種工作。系統(tǒng)程序由PLC生產(chǎn)廠家設(shè)計(jì)并固化在ROM內(nèi)，用戶不能直接讀取。PLC的用戶程序由用戶設(shè)計(jì)，它決定了PLC的輸入信號(hào)與輸出信號(hào)之間的具體關(guān)系。用戶程序存儲(chǔ)器的容量一般以字(每個(gè)字由16位二進(jìn)制數(shù)組成)為單位，三菱的FX系列PLC將用戶程序存儲(chǔ)器的單位稱為步(Step，即字)。小型PLC的用戶程序存儲(chǔ)器容量在lK字左右，大型PLC的用戶程序存儲(chǔ)器容量可達(dá)數(shù)M(兆)字。
? ? PLC常用以下幾種存儲(chǔ)器：
? ? (1)隨機(jī)存取存儲(chǔ)器：(RAM)
? ? 用戶可以用編程器讀出RAM中的內(nèi)容，也可以將用戶程序?qū)懭隦AM，因此RAM又叫讀／寫存儲(chǔ)器。它是易失性的存儲(chǔ)器，將它的電源斷開后，儲(chǔ)存的信息將會(huì)丟失。
? ? RAM的工作速度高，價(jià)格低，改寫方便。為了在關(guān)斷PLC外部電源后，保存RAM中的用戶程序和某些數(shù)據(jù)(如計(jì)數(shù)器的計(jì)數(shù)值)，為RAM配備了一個(gè)鋰電池。現(xiàn)在有的PLC仍用RAM來儲(chǔ)存用戶程序。
? ? 鋰電池可用2~5年，需要更換鋰電池時(shí)，PLC面板上的“電池電壓過低”發(fā)光二極管亮，同時(shí)有一個(gè)內(nèi)部標(biāo)志位變?yōu)閘狀態(tài)，可以用它的常開觸點(diǎn)來接通控制屏面板上的指示燈或聲光報(bào)警器，通知用戶及時(shí)更換鋰電池。
? ? (2)只讀存儲(chǔ)器(ROM)
? ? ROM的內(nèi)容只能讀出，不能寫入。它是非易失的，它的電源消失后，仍能保存儲(chǔ)存的內(nèi)容。ROM—般用來存放PLC的系統(tǒng)程序。
? ? (3)可電擦除的EPROM(EEPROM或E2PROM)
? ? 它是非易失性的，但是可以用編程器對(duì)它編程，兼有ROM的非易失性和RAM的隨機(jī)存取優(yōu)點(diǎn)。但是寫入信息所需的時(shí)間比RAM長得多，EEPROM用來存放用戶程序。有的PLC將EEPROM作為基本配置，有的PLC將EEPROM作為可選件。

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
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，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，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)起來也就簡單了。

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