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              PLC企業資訊
                C32CG04ADM
                發布者:gw0002  發布時間:2018-08-28 09:06:39

                C32CG04ADM

                C32CG04ADM

                C32CG04ADM

                ———偏門的備品備件聯系我們——————
                ———冷門的備品備件聯系我們——————
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                福建光沃自動化設備有限公司       
                聯系人    :歐工(銷售經理)                                         
                手機      :18030229053
                電話      :0592-5709825
                QQ        :2479261344                       
                郵箱      :2479261344@qq.com
                傳真      :0592-5917519

                信用=財富  誠信=財富  共贏=財富

                1.1 該機結構簡圖如圖1所示。紙機為1760/250m/min長網多缸文化紙機,生產40~65g/m2高級文化用紙,穩態精度≤0.01%。

                圖1 結構簡圖

                 

                  1.2 為了能生產出質量標準較高的產品,紙機對電氣傳動系統提出如下的要求:

                  (1) 紙機工作速度要有較大的調節范圍,調節范圍為1:8;

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

                  (3) 速差控制,速比可調、穩定。速差在一定范圍內變化不引起紙頁質量的突變,誤差應控制在0.1%以內。紙機各分部的速度必須是可以調節的,為±10~15%。

                  (4) 各分部傳動點具有速度微升、微降功能,同時在這些分部中,應具有單動、聯動功能,并可以同時起動、停止。

                  (5) 紙機為恒轉矩負載性質,要選擇具有恒轉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、控制系統組成

                  系統原理圖如圖2所示。該紙機傳動系統采用由S7-226小型PLC作為系統的控制中心;由森蘭SB70G系列變頻器為驅動單元,頻率分辨率為0.01Hz以上;變頻專用電機作為執行單元;歐姆龍PLC提供速度反饋信號,使紙機傳動在速度閉環運行,穩速精度達可達0.01%。由PLC通過西門子MODUBUS協議、RS485網絡與變頻器實現速度鏈功能、速差控制、負荷分配功能、總車速升、降、各分部點的速度升、降及緊紙、松紙等功能,較理想地滿足紙機正常工作的需求。

                圖2 系統原理圖

                 

                  3、速度鏈設計及速差控制

                  速度鏈結構采用二叉樹數據結構算法,完成數據傳遞功能。首先對各傳動點位置進行數學抽象,確定速度鏈中各傳動點編號,此編號應與變頻器內部地址一致。然后根據二叉樹數據結構,然后根據二叉樹數據結構,確定各結點的上下、左或右編號。即任一傳動點由3個數據確定其在速度鏈中的位置,填入位置寄存器數值該傳動點速度給變頻器后,訪問位置寄存器,確定子寄存器結點號,若不為0,則對該經點進行相應處理,直到該鏈完全處理完;再查兄弟寄存器結點號,處理另一支鏈。

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