產品詳情
6ES7223-1PL22-0XA8系統主要工作過程為:司機在看到允許開車信號以后,按下開車按鈕,由主PLC控制系統自動判斷開車去向,自動實現提升機開車、加速、等速、減速、爬行、停車的全過程。同時PLC監視提升機運行過程中的安全狀況,發現問題自動采取相應對策。脈沖軸編碼器作為提升系統的行程和速度的測量器件,具有很高的測量精度。在提升機的電機軸和導向輪上,各安裝一個脈沖軸編碼器進行同步測量,其計數值進人FM350—1計數模塊計數,PLC對計數結果進行分析和控制,完成提升位移、速度計算控制和顯示功能。一般以導向輪上脈沖軸編碼器計數為準,如果2個脈沖軸編碼器計數值不一致,當其誤差達到一定值時,說明鋼絲繩打滑,PLC將發出報警信號。
6ES7223-1PL22-0XA8將用戶程序指令存放在“塊”中,本控制系統主要有4類用戶程序:功能Fc(Function)、功能FB(Function block)、組織塊OB(Organization block)和數據塊(Date block),其中FB和Fc作為OB的子程序。主循環模塊OB1中存放所有用戶程序以待執行,也可以將用戶程序存放入不同的功能模塊中,只在OB1中調用,需要時才執行。PLC的CPU中的操作系統在系統啟動后將連續循環掃描執行OB1,實現對現場設備的控制。本系統使用了3個OB塊(OB10、OB100、0B35)。OB100為加電啟動組織塊。在該組織塊中編制有關系統參數初始化的程序。該組織塊僅在系統加電起動后運行一次。0B35為中斷組織塊,它的主要功能是產生時間中斷,本系統時間中斷時間設為20 Ills,本系統利用OB35的時間中斷功能計算提升速度和加速度。
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