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3511 脈衝輸入模塊
(1) 回路啟動順序由下遊向上遊(來料方向為上遊) , 按延時, 逐個啟動, 若回路啟動過程中無故障, 則為正常啟動; 若有故障則為異常啟動, 程序啟動遇到故障時, 就不再繼續往下啟動。
(2) 回路停止順序由上遊向下遊, 它包括正常停止和事故停止。正常停止為順序停止,即正常操作時程序按時間延時由上遊向下遊逐個停止設備。事故停止是在啟動或正常運行過程中回路中某一設備發生故障時, 上遊的設備立即停止,下遊設備可運行。
(3) 在邏輯梯形圖中, 凡是帶有分支的聯鎖回路都有記憶功能。因為前一臺設備可以根據需要啟動下面的各個分支回路的設備, 回路梯形邏輯的記憶功能, 可保證有故障回路的設備能正確停車。
(4) 上位機能顯示出整個皮帶運行狀態。 亦能顯示單條回路運行的設備。
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