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【入门】4、了解PLC的硬件结构、工作原理 | 
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赵工,扫描周期的工作方式没写出来哦 
 
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可以, 
 
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逐行扫描 
 
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恩恩,最后统一输出的 
 
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恩恩,逐行扫描,统一输出 
 
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最后逐行扫描,统一输出 
 
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