57C494

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電話:18150087953 / 18005022138

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Email：sales@cxplcmro.com

描述

57C494

使用要點
　　(1)抗干擾措施。來自電源線的雜波，能造成系統(tǒng)電壓畸變，導(dǎo)致系統(tǒng)內(nèi)電氣設(shè)備的過電壓、過負(fù)荷、過熱甚至燒毀元器件，造成PLC等控制設(shè)備誤動作。所以，在電源入口處最好應(yīng)設(shè)置屏蔽變壓器或電源濾波等防干擾設(shè)施。其中，電源濾波器的地要以最短線路接到中央保護(hù)地。對于直流電源，則可加裝微分電容加以干擾抑制。
　　(2)保護(hù)接地?？刹扇∮貌恍∮?0mm2的保護(hù)導(dǎo)線接好配電板的保護(hù)地；相鄰的控制柜也應(yīng)良好接觸并與地可靠連接。同時要做好防雷保護(hù)接地，通常可采取總線電纜使用屏蔽電纜且屏蔽層兩端接地，或模擬信號電纜采取兩層屏蔽，外層屏蔽兩端接地等措施。另外，為防止感應(yīng)雷進(jìn)入系統(tǒng)，可采用浪涌吸收器。
　　(3)做好信號屏蔽。信號的屏蔽非常關(guān)鍵，一般可采取屏蔽電纜傳送模擬信號。注意對多個模擬信號共用一根多芯屏蔽電纜或用兩種屏蔽電纜傳送時，信號間一定要做好屏蔽。而且電纜的屏蔽層一端(一般在控制柜端)要可靠接地。
　　(4)當(dāng)現(xiàn)場沒有或無法設(shè)置硬點時，可在操作界面上采取軟按鍵的方法解決走向選擇或控制方式選擇等問題。此外，與變頻器、智能儀表等的連接，最好還是采用信號線直接相連的方式。
　　(5)應(yīng)合理配置PLC的使用環(huán)境，提高系統(tǒng)抗干擾能力。具體采取的措施有：遠(yuǎn)離高壓柜、高頻設(shè)備、動力屏以及高壓線或大電流動力裝置；通信電纜和模擬信號電纜盡量不與其他屏 (盤)或設(shè)備共用電纜溝；PLC柜內(nèi)不用熒光燈等。另外，PLC雖適合工業(yè)現(xiàn)場，但使用中也應(yīng)盡量避免直接震動和沖擊、陽光直射、油霧、雨淋等；不要在有腐蝕性氣體、灰塵過多、發(fā)熱體附近應(yīng)用；避免導(dǎo)電性雜物進(jìn)入控制器。

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
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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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，機器人系統(tǒng)配件，大型伺服系統(tǒng)備件。

先介紹幾點經(jīng)驗。
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)運算、實數(shù)運算、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證，比如變頻器+電機+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。

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