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我才開始自學plc，問題太菜的話請師傅們包容一下！
用cpm1a控制步進驅動器，寫了如圖的梯形圖，不知能否運行，有些確實搞不懂，比如bcd碼怎樣表示等等，問題在以下圖中，麻煩解答，O(∩_∩)O謝謝！

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