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 <title><![CDATA[请教]]></title>
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 <description><![CDATA[Latest 50 replies of 请教]]></description>
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 <title><![CDATA[工控人家园]]></title>
 <link><![CDATA[http://www.ymmfa.com]]></link>
 <description><![CDATA[工控人家园]]></description>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[帖名我不知如何更改,下次一定更改]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-38321#540202.html]]></link>
 <author><![CDATA[heming28]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Thu, 04 Jun 2009 00:38:27 +0000]]></pubdate>
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<item>
 <title><![CDATA[Re:一个STL语句问题]]></title>
 <description><![CDATA[版主我想问连续两个OLD作用是SM0.4（固定频率脉冲）导通的上升沿，M23.6标志位导通，就是在SM0.4开的瞬间M23.4开一次，同时调用一次Timer子程序,也就是仅调用一次Timer子程序吗?谢谢]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-38321#540199.html]]></link>
 <author><![CDATA[heming28]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Thu, 04 Jun 2009 00:36:12 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[s7-200和S7-300的STL语句表不同吗?]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-38321#539593.html]]></link>
 <author><![CDATA[ruirongxu]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 03 Jun 2009 10:29:12 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[SM0.1（上电导通一个扫描周期，就是程序从走走到尾一次）导通后，调用初始化子程序INIT
SM0.5（固定频率脉冲，好像是一秒钟开关一次吧）导通的上升沿，M23.4标志位导通，就是在SM0.5开的瞬间M23.4开一次
SM0.5（固定频率脉冲，好像是一秒钟开关一次吧）导通的下降沿，M23.5标志位导通，就是在SM0.5关的瞬间M23.5开一次
SM ..]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-38321#539553.html]]></link>
 <author><![CDATA[bhqt]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 03 Jun 2009 09:39:04 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[版主帮我看看]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-38321#539339.html]]></link>
 <author><![CDATA[heming28]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 03 Jun 2009 05:13:08 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[图中连续OLD指令看不懂]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-38321#538226.html]]></link>
 <author><![CDATA[heming28]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Tue, 02 Jun 2009 06:44:23 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[帮我看看]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-38321#537840.html]]></link>
 <author><![CDATA[heming28]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Tue, 02 Jun 2009 01:21:44 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[我是说上图OLD]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-38321#536896.html]]></link>
 <author><![CDATA[heming28]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Mon, 01 Jun 2009 05:55:03 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[OLD&nbsp;&nbsp;或塊。你手中沒有S7-200系統手冊嗎？

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 <link><![CDATA[http://www.ymmfa.com/read-gktid-38321#536858.html]]></link>
 <author><![CDATA[cvlsam]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Mon, 01 Jun 2009 05:14:57 +0000]]></pubdate>
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