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PLC企業(yè)資訊
    C32CG04ADM
    發(fā)布者:gw0002  發(fā)布時(shí)間:2018-08-28 09:06:39

    C32CG04ADM

    C32CG04ADM

    C32CG04ADM

    ———偏門的備品備件聯(lián)系我們——————
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    福建光沃自動(dòng)化設(shè)備有限公司       
    聯(lián)系人    :歐工(銷售經(jīng)理)                                         
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    信用=財(cái)富  誠信=財(cái)富  共贏=財(cái)富

    1.1 該機(jī)結(jié)構(gòu)簡圖如圖1所示。紙機(jī)為1760/250m/min長網(wǎng)多缸文化紙機(jī),生產(chǎn)40~65g/m2高級(jí)文化用紙,穩(wěn)態(tài)精度≤0.01%。

    圖1 結(jié)構(gòu)簡圖

     

      1.2 為了能生產(chǎn)出質(zhì)量標(biāo)準(zhǔn)較高的產(chǎn)品,紙機(jī)對(duì)電氣傳動(dòng)系統(tǒng)提出如下的要求:

      (1) 紙機(jī)工作速度要有較大的調(diào)節(jié)范圍,調(diào)節(jié)范圍為1:8;

      (2) 車速要有較高的穩(wěn)定裕度,總車速提升、下降要平穩(wěn)。要求紙機(jī)穩(wěn)速精度為±0.05~0.01%;

      (3) 速差控制,速比可調(diào)、穩(wěn)定。速差在一定范圍內(nèi)變化不引起紙頁質(zhì)量的突變,誤差應(yīng)控制在0.1%以內(nèi)。紙機(jī)各分部的速度必須是可以調(diào)節(jié)的,為±10~15%。

      (4) 各分部傳動(dòng)點(diǎn)具有速度微升、微降功能,同時(shí)在這些分部中,應(yīng)具有單動(dòng)、聯(lián)動(dòng)功能,并可以同時(shí)起動(dòng)、停止。

      (5) 紙機(jī)為恒轉(zhuǎn)矩負(fù)載性質(zhì),要選擇具有恒轉(zhuǎn)矩控制性能的變頻器,并具有較高的分辨率,良好的通訊能力。

      2、控制系統(tǒng)組成

      系統(tǒng)原理圖如圖2所示。該紙機(jī)傳動(dòng)系統(tǒng)采用由S7-226小型PLC作為系統(tǒng)的控制中心;由森蘭SB70G系列變頻器為驅(qū)動(dòng)單元,頻率分辨率為0.01Hz以上;變頻專用電機(jī)作為執(zhí)行單元;歐姆龍PLC提供速度反饋信號(hào),使紙機(jī)傳動(dòng)在速度閉環(huán)運(yùn)行,穩(wěn)速精度達(dá)可達(dá)0.01%。由PLC通過西門子MODUBUS協(xié)議、RS485網(wǎng)絡(luò)與變頻器實(shí)現(xiàn)速度鏈功能、速差控制、負(fù)荷分配功能、總車速升、降、各分部點(diǎn)的速度升、降及緊紙、松紙等功能,較理想地滿足紙機(jī)正常工作的需求。

    圖2 系統(tǒng)原理圖

     

      3、速度鏈設(shè)計(jì)及速差控制

      速度鏈結(jié)構(gòu)采用二叉樹數(shù)據(jù)結(jié)構(gòu)算法,完成數(shù)據(jù)傳遞功能。首先對(duì)各傳動(dòng)點(diǎn)位置進(jìn)行數(shù)學(xué)抽象,確定速度鏈中各傳動(dòng)點(diǎn)編號(hào),此編號(hào)應(yīng)與變頻器內(nèi)部地址一致。然后根據(jù)二叉樹數(shù)據(jù)結(jié)構(gòu),然后根據(jù)二叉樹數(shù)據(jù)結(jié)構(gòu),確定各結(jié)點(diǎn)的上下、左或右編號(hào)。即任一傳動(dòng)點(diǎn)由3個(gè)數(shù)據(jù)確定其在速度鏈中的位置,填入位置寄存器數(shù)值該傳動(dòng)點(diǎn)速度給變頻器后,訪問位置寄存器,確定子寄存器結(jié)點(diǎn)號(hào),若不為0,則對(duì)該經(jīng)點(diǎn)進(jìn)行相應(yīng)處理,直到該鏈完全處理完;再查兄弟寄存器結(jié)點(diǎn)號(hào),處理另一支鏈。

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