深圳長(zhǎng)欣自動(dòng)化設(shè)備
深圳長(zhǎng)欣自動(dòng)化設(shè)備

KW3400F 有貨 實(shí)物圖 (復(fù)制)

分類： 標(biāo)簽：
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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描述

KW3400F

市場(chǎng)規(guī)模不同
由于DCS是成套系統(tǒng)，設(shè)備及軟件授權(quán)費(fèi)用較高，如果I/O點(diǎn)數(shù)少于一百個(gè)點(diǎn)，則DCS的單點(diǎn)成本較高。而SCADA系統(tǒng)中采用的控制器，其控制點(diǎn)數(shù)配置更加靈活，可以根據(jù)I/O的點(diǎn)數(shù)選擇相應(yīng)的控制器。因此，對(duì)于基點(diǎn)數(shù)較少的系統(tǒng)來說，選擇SCADA的成本相對(duì)較低。
02
SCADA、DCS與PLC的比較
DCS有上位機(jī)和下位機(jī)，SCADA系統(tǒng)只有上位機(jī)
DCS有上位機(jī)和下位機(jī)，上位機(jī)包括工程師站、操作員站，下位機(jī)包括現(xiàn)場(chǎng)控制站；SCADA系統(tǒng)只有上位機(jī)，包括SCADA服務(wù)器和客戶機(jī)；而PLC組成的系統(tǒng)實(shí)沒有上位機(jī)，其主要功能就是現(xiàn)場(chǎng)控制，常選用PLC作為SCADA系統(tǒng)的下位機(jī)設(shè)備。因此，可以把PLC看作SCADA系統(tǒng)的一部分。

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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！
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，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(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)起來也就簡(jiǎn)單了。

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