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 <title><![CDATA[VB读写三菱FX系列PLC数据]]></title>
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 <description><![CDATA[private sub command1_click()
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; mscomm1.output=chr(2)+&quot;1&quot;+&quot;1000&quot;+text1.text+chr(3)+sum
end sub

sum是校验和=chr(2)~chr(3)不包括chr(2)的字符串的ascii码的16进制和的后两位
如输入数值为&quot;1“则sum=31H+31H+30H+30H+30H+31H+03H=126H取后两位字符=&qu ..]]></description>
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 <author><![CDATA[xingshengwei]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Wed, 22 Jul 2009 14:24:21 +0000]]></pubdate>
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