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 <title><![CDATA[关于变频器频率和速度的转换]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-95607.html]]></link>
 <description><![CDATA[Latest 50 replies of 关于变频器频率和速度的转换]]></description>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用的LS的变频器，，没看见说明书里有这项。。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-95607#968956.html]]></link>
 <author><![CDATA[luanzh]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 10 Feb 2011 08:01:02 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[有的变频器可以显示速度的，但得设置一些参数]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-95607#968943.html]]></link>
 <author><![CDATA[jxh668]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 10 Feb 2011 07:41:31 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[开环的不会准的]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-95607#968941.html]]></link>
 <author><![CDATA[许一民]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 10 Feb 2011 07:39:10 +0000]]></pubdate>
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 <description><![CDATA[一般是低速运行，，低速的时候S会变化。所以我想问下大家是怎么算的。。。速度不会超过90M/MIN]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-95607#968936.html]]></link>
 <author><![CDATA[luanzh]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 10 Feb 2011 07:30:11 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[HMI通信直接写。。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-95607#968931.html]]></link>
 <author><![CDATA[luanzh]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 10 Feb 2011 07:22:20 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[请问楼主是如何控制变频器频率？是HMI通过通信直接写入频率？还是其它D/A模块？0-10V电压信号或是4-20MA电流信号控制？如果是模拟信号就要0-10V或4-20MA对应的频率折算就可。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-95607#968927.html]]></link>
 <author><![CDATA[chen_0106]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 10 Feb 2011 07:11:17 +0000]]></pubdate>
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