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 <title><![CDATA[请教各位朋友]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-11401.html]]></link>
 <description><![CDATA[Latest 50 replies of 请教各位朋友]]></description>
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 <title><![CDATA[]]></title>
 <description><![CDATA[谢谢各位朋友了]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-11401#196911.html]]></link>
 <author><![CDATA[a113118a]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 27 Mar 2008 14:07:16 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[我也想学这个耶
就是弄不清楚]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-11401#195742.html]]></link>
 <author><![CDATA[yeyhx]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 25 Mar 2008 12:50:26 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[PLC　变频器　　自个搜下，本网站遍地有黄金。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-11401#195671.html]]></link>
 <author><![CDATA[taipi-k]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 25 Mar 2008 11:07:02 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[有三种方法

1,用PLC的输出点接到变频器上,通过 A&nbsp;  B&nbsp; C&nbsp;  AB&nbsp;  AC&nbsp;  BC&nbsp; ABC 这样的组合做多段速度
2,用PLC加模块,输出电压信号给变频器来控制速度
3,用PLC通过485与变频器通讯来控制速度]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-11401#195380.html]]></link>
 <author><![CDATA[YMMFA]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 25 Mar 2008 01:56:58 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[你要求的变频器的频率是连续的还是多段速的。如是连续的，则PLC需要ＡＯ去控制，多段速的可以用ＰＬＣ的ＤＯ来控制。相应的变频器内部参数也应设定，设定方式参考所用变频器的说明书！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-11401#195378.html]]></link>
 <author><![CDATA[lfeieng]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 25 Mar 2008 01:49:24 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[请教1楼,说的详细点 [s:39]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-11401#195330.html]]></link>
 <author><![CDATA[fwjavl]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 24 Mar 2008 20:21:17 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[可以的,不过要把plc的型号配对]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-11401#195288.html]]></link>
 <author><![CDATA[dx1980]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 24 Mar 2008 16:50:27 +0000]]></pubdate>
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