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 <title><![CDATA[求助用PLC和编码器如何显示转速且超过一定 ..]]></title>
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 <description><![CDATA[Latest 50 replies of 求助用PLC和编码器如何显示转速且超过一定 ..]]></description>
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 <description><![CDATA[学习可阿 [s:21]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-8562#432100.html]]></link>
 <author><![CDATA[zhangshichao]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 13 Feb 2009 11:13:26 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[值得看看]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-8562#392687.html]]></link>
 <author><![CDATA[johnwu]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 20 Dec 2008 15:50:55 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用 PLC 程序&nbsp;&nbsp;PID 调节就可以&nbsp;&nbsp;不过很费时间]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-8562#392543.html]]></link>
 <author><![CDATA[270862117]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 20 Dec 2008 12:33:04 +0000]]></pubdate>
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 <description><![CDATA[[quote]引用第3楼nbwrk于2007-12-25 20:11发表的&nbsp; :
用SPD脉冲密度就可以了[/quote]

看这个指令就可以了，当大于时你想怎么减就怎么减。。。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-8562#170762.html]]></link>
 <author><![CDATA[wsir123]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 15 Jan 2008 03:57:02 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[&nbsp; &nbsp; &nbsp; &nbsp; 什么电机~~~~~~~~?]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-8562#170565.html]]></link>
 <author><![CDATA[25188400]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 14 Jan 2008 15:45:33 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[YES~~~~`]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-8562#170564.html]]></link>
 <author><![CDATA[25188400]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 14 Jan 2008 15:43:21 +0000]]></pubdate>
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 <description><![CDATA[[s:43]&nbsp; [s:43]&nbsp; [s:43]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-8562#170524.html]]></link>
 <author><![CDATA[编程学习]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 14 Jan 2008 14:53:08 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用SPD脉冲密度就可以了]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-8562#161387.html]]></link>
 <author><![CDATA[nbwrk]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 25 Dec 2007 12:11:49 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[这个不难实现!]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-8562#161311.html]]></link>
 <author><![CDATA[电梯浪子]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 25 Dec 2007 10:08:17 +0000]]></pubdate>
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