品牌:施耐德 | 規格:140NOE77100 | 材質:140NOE77100 |
產地:美國 |
140NOE77100
140NOE77100
140NOE77100
CPU從第一條指令開始執行程序,直至遇到結束符後又返回第一條。如此周而復始不斷循環。這種工作方式是在係統軟件控制下,順次掃描各輸入點的狀態,按用戶程序進行運算處理,然後順序向輸出點發出相應的控制信號。整個工作過程可分為五個階段:自診斷,與編程器等的通信,輸入採樣,用戶程序執行,輸出刷新
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