1FT5044-0AF71-1

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1FT5044-0AF71-1

? 隨著工業(yè)設(shè)備自動化控制技術(shù)的發(fā)展，可編程控制器(PLC)在工業(yè)設(shè)備控制中的應用越來越廣泛。PLC控制系統(tǒng)的可靠性直接影響到企業(yè)的安全生產(chǎn)和經(jīng)濟運行，系統(tǒng)的抗干擾能力是關(guān)系到整個系統(tǒng)可靠運行的關(guān)鍵。本文詳細介紹了影響PLC運行的干擾類型及來源，并提出抗干擾設(shè)計的實施策略。
? ? 自動化系統(tǒng)所使用的各種類型PLC中，有的是集中安裝在控制室，有的是安裝在生產(chǎn)現(xiàn)場和各電機設(shè)備上，它們大多處在強電電路和強電設(shè)備所形成的惡劣電磁環(huán)境中。要提高PLC控制系統(tǒng)可靠性，一方面要求PLC生產(chǎn)廠家提高設(shè)備的抗干擾能力，另一方面要求應用部門在工程設(shè)計、安裝施工和使用維護中引起高度重視，多方配合才能完善解決問題，有效地增強系統(tǒng)的抗干擾性能。
? ? 電磁干擾類型及其影響
? ? 影響PLC控制系統(tǒng)的干擾源與一般影響工業(yè)控制設(shè)備的干擾源一樣，大都產(chǎn)生在電流或電壓劇烈變化的部位，這些電荷劇烈移動的部位就是干擾源。
? ? 干擾類型通常按干擾產(chǎn)生的原因、噪聲干擾模式和噪聲波形性質(zhì)來劃分。按噪聲產(chǎn)生的原因不同，分為放電噪聲、浪涌噪聲、高頻振蕩噪聲等；按噪聲的波形、性質(zhì)不同，可分為持續(xù)噪聲、偶發(fā)噪聲等；按噪聲干擾模式不同，分為共模干擾和差模干擾。
? ? 共模干擾和差模干擾是一種比較常用的分類方法。共模干擾是信號對地的電位差，主要由電網(wǎng)串入、地電位差及空間電磁輻射在信號線上感應的共態(tài)(同方向)電壓迭加所形成。共模電壓有時較大，特別是采用隔離性能差的配電器供電時，變送器輸出信號的共模電壓普遍較高，有的可高達130V以上。共模電壓通過不對稱電路可轉(zhuǎn)換成差模電壓，影響測控信號，造成元器件損壞(這就是一些系統(tǒng)I/O模件損壞率較高的主要原因)，這種共模干擾可為直流、亦可為交流。差模干擾是指作用于信號兩極間的干擾電壓，主要由空間電磁場在信號間耦合感應及由不平衡電路轉(zhuǎn)換共模干擾所形成的，這種干擾疊加在信號上，直接影響測量與控制精度。

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A06B-6066-H008 FANUC SERVO AMPLIFIER *REFURB**

45A469 CARLSON-DIAMOND TORQUE LIMITER

A06B-0148-B188#?7008 FANUC

MDD112D-N-020-N?2L-130PB2 INDRAMAT

4812 XYCOM

120-085-001 MODICON

A06B-6066-H223 FANUC

AS-B260-010 MODICON

MM-PMA1-400 MODICON

AS-521P-008 MODICON

AS-184B-000 MODICON

MDD090B-N-040-N?2M-110GL1 INDRAMAT

MDD090B-N-040-N?2M-110GR1 INDRAMAT

MDD090B-N-040-N?2M-110GA1 INDRAMAT

MDD090B-N-040-N?2M-110GB1 INDRAMAT

210-10-5202 HUFFMAN OPERATOR PANEL

121-085-605 MODICON

121-087-306 MODICON

B85732SFT-019 MACHINE GEAR GEAR

A06B-0143-B175#?7075 FANUC

CLM-01.2-A272 INDRAMAT 2 AXIS SERVO CONTROLLER

AWS-850CT ADVANTECH WORKSTATION *1YRWRTY*

A06B-0502-B072#?C008 FANUC *1 YR WARRANTY*

1FT6084-8AK71-3?EG1 SIEMENS

HDS03.2-W075N-H?S32-01-FW INDRAMAT *1 YR WARRANTY*

1391B-AA15 ALLEN BRADLEY CONTROLLER *1YRWRTY*

A06B-0346-B255 FANUC

1785-L20B ALLEN BRADLEY

MDD093A-N-060-N?2L-110PL0 INDRAMAT

MDD093A-N-060-N?2L-110GR0 INDRAMAT

MDD093A-N-060-N?2L-110GA0 INDRAMAT

MDD093A-N-060-N?2L-110GB0 INDRAMAT

MDD093A-N-060-N?2L-110PB0 INDRAMAT

MDD093A-N-060-N?2L-110PA0 INDRAMAT

MM-PM15-414 MODICON PANELMATE PLUS *1YRWRTY*

7000-ST TOTAL CONTROL 9 IN. OPERATOR INTERFACE

A06B-0148-B177#?7008 FANUC

800L-302A CONTROL GAGING

800L-300D CONTROL GAGING

800L-1020AG-R CONTROL GAGING

專業(yè)銷售進口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，以便學習編程時查找）；
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、進而練習整數(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，學會一種至于其它的學習起來也就簡單了。

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