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ACTISLAN-12IP-LAN-12敦煌縣
ACTISLAN-12IP-LAN-12敦煌縣
產品價格:¥1.00(人民幣)
  • 供應數量:1
  • 發貨地:福建-廈門市
  • 最小起訂量:1個
  • 免費會員
    會員級別:免費會員
    認證類型:企業認證
    企業證件:通過認證

    商鋪名稱:廈門億佳天辰貿易有限公司

    聯系人:張工(先生)

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    商品詳情
      ACTISLAN-12IP-LAN-12敦煌縣
      中斷的內容有很多種,比如外部中斷、通信中的發送和接受中斷、定時和計數的時鐘中斷、還有WDT復位中斷等,它們豐富了在處理各種事務時響應種類。這樣講也許你并不能完全理解中斷的內部結構和操作順序,我們做一個小小的例子來說明.


      每一個設備總是不會忘記有一個按鈕,它也是在我們遇到緊急情況時使用的,那就是急停按鈕。當我們遇到人身事故和意外情況時我們只要按下它,機器立即停止所有的操作,并等待處理完意外后再恢復操作。急停按鈕連接PLC內部的內部I/O接口上,當按鈕給一個外部觸發信號時,對I/O進行再次檢測,當確認有外部觸發信號時,保護現場并將程序計數器自動轉到相應的外部I/O中斷程序中去,當外部中斷程序處理完畢,程序計數器返回到主程序繼續工作。有一點可以說明的是我們一般會把急停按鈕的外部中斷升至別,從而保證安全。


      當我們在工作完一個工件時,給PLC一個信號,將PLC的內部計數器加1來計算我們的工作量時,一個簡單的計數器能解決問題,當然它們也能夠在掉電的情況下保持數據,促使數據不丟失,這也是我們所渴望的。


      PLC還具有計數器的功能,當我們在接受一些高速的數據時,這里所說的高速是在在微秒級的數據,比如條碼掃描機在不斷的掃描數據,數據處理器DSP計算的高速信號等,我們就要采用到計數器來幫助我們進行計數。它在PLC執行程序時一旦發現計數器對應的中斷,就會立即放下手上的工作。經過再次編程的梯形圖程序說明我們在執行程序時計數器會自動的執行對應的工作,從而將計數器的級別升至高一級別。

      ACTISLAN-12IP-LAN-12敦煌縣ACTISLAN-12IP-LAN-12敦煌縣
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