TRICONEX 3201

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描述

TRICONEX 3201

在企業(yè)生產(chǎn)中，往往需要有穩(wěn)定的壓力、溫度、流量、液位或轉(zhuǎn)速，作為保證產(chǎn)品質(zhì)量、提高生產(chǎn)效率、滿足工藝要求的前提，這時就要用到變頻器的PID控制功能。PID控制在生產(chǎn)過程中是一種普遍采用的控制方式，在機(jī)電、冶金、機(jī)械、化工等行業(yè)中獲得了廣泛的應(yīng)用。通過變頻器實現(xiàn)PID控制有兩種情況：一種是變頻器內(nèi)置PID控制功能，給定信號通過變頻器的鍵盤面板或端子輸入，反饋信號反饋給變頻器的控制端，在變頻器內(nèi)部進(jìn)行PID調(diào)節(jié)以改變輸出頻率；另一種是用外部的PID調(diào)節(jié)器將給定量與反饋量比較后輸出給變頻器加到控制端子作為控制信號?？傊?，變頻器的PID控制是與傳感器元件構(gòu)成的一個閉環(huán)控制系統(tǒng)，可以實現(xiàn)對被控制量的自動調(diào)節(jié)。?設(shè)計PLC控制系統(tǒng)時，常常會需要在外部改變PLC內(nèi)部的數(shù)據(jù)，如Counter、Timer或者Data的值，以適應(yīng)生產(chǎn)過程的需要。而且要求系統(tǒng)關(guān)機(jī)以后，這些數(shù)據(jù)還能夠保存在PLC內(nèi)部，當(dāng)下次開機(jī)后，這些數(shù)據(jù)可以被調(diào)出繼續(xù)使用。于是許多PLC都提供了掉電保持寄存器，以便在PLC斷電的時候保存用戶想要保存的數(shù)據(jù)。SPD的電壓保護(hù)水平Up應(yīng)始終小于被保護(hù)設(shè)備的沖擊耐受電壓Uchoc,并且大于根據(jù)接地類型得出的電網(wǎng)最高運行電壓Usmax,即Usmax<Up<Uchoc,若線路無屏蔽,尚應(yīng)計入線路感應(yīng)電壓,Uchoc宜按其值的80%考慮;SPD與被保護(hù)設(shè)備兩端引線應(yīng)盡可能短,控制在0.5m以內(nèi);
如果進(jìn)線端SPD的Up加上其兩端引線的感應(yīng)電壓以及反射波效應(yīng)與距其較遠(yuǎn)處的被保護(hù)設(shè)備的沖擊耐受電壓相比過高,則需在此設(shè)備處加裝第二級SPD,其標(biāo)稱放電電流In不宜小于8/20μs3kA;當(dāng)進(jìn)線端SPD距被保護(hù)設(shè)備不大于10m時,若該SPD的Up加上其兩端引線的感應(yīng)電壓小于設(shè)備的Uchoc的80%,一般情況在該設(shè)備處可不裝SPD;
當(dāng)按上述第3點要求裝的SPD之間設(shè)有配電盤時,若第一級SPD的Up加上其兩端引線的感應(yīng)電壓保護(hù)不了該配電盤內(nèi)的設(shè)備,應(yīng)在該配電盤內(nèi)安裝第二級SPD,其標(biāo)稱放電電流In不宜小于8/20μs5kA;
當(dāng)在線路上多處安裝SPD時,電壓開關(guān)型SPD與限壓型SPD之間的線路長度不宜小于10m,限壓型SPD之間的線路長度不宜小于5m。例如:被保護(hù)設(shè)備與配電中心距離較近,在線路敷設(shè)上可特意多繞一些導(dǎo)線;
當(dāng)進(jìn)線端的SPD與被保護(hù)設(shè)備之間的距離大于30m時,應(yīng)在離被保護(hù)設(shè)備盡可能近的地方安裝另一個SPD,通流容量可為8kA;
選擇SPD時應(yīng)注意保證不會因工頻過壓而燒毀SPD,因SPD是防瞬態(tài)過電壓(μs級),工頻過電壓是暫態(tài)過電壓(ms級),工頻過電壓的能量是瞬態(tài)過電壓能量的幾百倍,因此,應(yīng)注意選擇較高工頻工作電壓的SPD;
SPD的保護(hù):每級SPD都應(yīng)設(shè)保護(hù),可采用斷路器或熔斷器進(jìn)行保護(hù),保護(hù)器的斷流容量均大于該處最大短路電流;

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(jī)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，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(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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