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 <title><![CDATA[三菱PLC的高速计数C251如何用]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852.html]]></link>
 <description><![CDATA[Latest 50 replies of 三菱PLC的高速计数C251如何用]]></description>
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 <description><![CDATA[学习观望&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1112364.html]]></link>
 <author><![CDATA[烟来如此]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 20 Aug 2011 14:46:16 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[c251 为a b相计数&nbsp;&nbsp;最高30khz 需接x0 及x1&nbsp;&nbsp;在进过程序dhscs处理]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1112354.html]]></link>
 <author><![CDATA[李飞]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 20 Aug 2011 14:28:17 +0000]]></pubdate>
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 <description><![CDATA[学习学习学习学习学习学习学习学习]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1112221.html]]></link>
 <author><![CDATA[红猪]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 20 Aug 2011 09:07:53 +0000]]></pubdate>
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 <description><![CDATA[讨论问题提问一定要详细些。回答更要详细。谢谢。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1112179.html]]></link>
 <author><![CDATA[大鹏展翅168]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 20 Aug 2011 07:22:23 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[4楼的，说的这么简单，那4根线啊，在细一点，好不]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1111515.html]]></link>
 <author><![CDATA[zhuweijun]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 19 Aug 2011 05:45:32 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[看看手册啊]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1110894.html]]></link>
 <author><![CDATA[shenyijin]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 18 Aug 2011 06:22:49 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[quote]引用第4楼小徒弟于2011-08-15 21:03发表的&nbsp;&nbsp;:
C251为双相计数器&nbsp;&nbsp;X0为A 相计数&nbsp;&nbsp;X1为B相计数&nbsp;&nbsp; 要用RST复位&nbsp;&nbsp;可用M8251的状态可表达是再增计数还是减计数（可能是编码器的正反转吧&nbsp;&nbsp;因为A&nbsp;&nbsp;B 两相脉冲相位差90度&nbsp;&nbsp;没试过）最高可 ..]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1110885.html]]></link>
 <author><![CDATA[dl2006]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 18 Aug 2011 06:11:25 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[4楼说的太详细了。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1110311.html]]></link>
 <author><![CDATA[liuhanqi]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 17 Aug 2011 07:24:36 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[呵呵C251，你就按照说明书上用就可以了，很好用的。接4根线（编码器），然后一行指令就OK了]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1109498.html]]></link>
 <author><![CDATA[niningtt]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 16 Aug 2011 02:10:08 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[C251为双相计数器&nbsp;&nbsp;X0为A 相计数&nbsp;&nbsp;X1为B相计数&nbsp;&nbsp; 要用RST复位&nbsp;&nbsp;可用M8251的状态可表达是再增计数还是减计数（可能是编码器的正反转吧&nbsp;&nbsp;因为A&nbsp;&nbsp;B 两相脉冲相位差90度&nbsp;&nbsp;没试过）最高可达5KHZ&nbsp;&nbsp;反正用这个计数器不好玩&nbsp;&nbsp;&nbsp;& ..]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1109284.html]]></link>
 <author><![CDATA[小徒弟]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 15 Aug 2011 13:03:43 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[呵呵！观望学习！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1109161.html]]></link>
 <author><![CDATA[hhhhuang]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 15 Aug 2011 08:41:06 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[可以详细一点吗，
不接线肯定不行，怎么接。如何控制，]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1109130.html]]></link>
 <author><![CDATA[zhuweijun]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 15 Aug 2011 08:06:37 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[你要是不接线，高速计数器怎么开始计数了。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-116852#1109109.html]]></link>
 <author><![CDATA[gumeng]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 15 Aug 2011 07:19:48 +0000]]></pubdate>
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