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 <title><![CDATA[肯求一个S7-200与变频器通讯控制的例子]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-47507.html]]></link>
 <description><![CDATA[Latest 50 replies of 肯求一个S7-200与变频器通讯控制的例子]]></description>
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 <title><![CDATA[]]></title>
 <description><![CDATA[谢谢楼上的老师，能说说是怎么控制的吗，从哪起动变频器，怎么调节频率的，变频是怎么设置的？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-47507#644389.html]]></link>
 <author><![CDATA[jjh2143]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 10 Oct 2009 14:40:30 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[还是附件带上吧
给你参考 [s:26]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-47507#644204.html]]></link>
 <author><![CDATA[打豆豆]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 10 Oct 2009 11:03:35 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[我写过一个哦
就是西门子200和三晶变频器MODBUS通讯&nbsp;&nbsp;CRC校验 [s:26]
站内收索]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-47507#644203.html]]></link>
 <author><![CDATA[打豆豆]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 10 Oct 2009 11:02:04 +0000]]></pubdate>
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