從機械手動作流程圖可以看出，這個控制任務每個循環的工作可以劃分為八步，其中第1步與第5步動作相同，均為上升；第3步和第7步動作相同，Anritsu KL2300A Anritsu KL2300A 均為下降。在利用步進指令進行編程時，這兩個工步所對應的程序段的輸出不能直接設置為Y3、Y4，同一個輸出使用兩次則會出現語法錯誤。這時應考慮使用用于存儲中間狀態的內部通用繼電器Rn來解決這個問題。如圖7所示梯形圖程序

（圖片只做參考，不代表實物圖，價格和具體內容請電詢，感謝您的配合）


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