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jx_einstein
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樓主  發(fā)表于: 2012-02-10 09:19
我用SCU21-V1讀條碼，用232通訊，沒(méi)有反應，高手幫忙看看。轉接線(xiàn)，PLC端2.3.9.條碼槍端3.2.5.   接線(xiàn)PLC和條碼槍  2.3交叉。5接9.
附件： 串口.rar (5 K) 下載次數:126
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fubin739
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1樓  發(fā)表于: 2012-03-01 11:51
看下公共線(xiàn)又沒(méi)接對，在電腦串口上只要兩根線(xiàn)就讀的到，但到PLC上公共線(xiàn)接觸不好有時(shí)讀不了的

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