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 <title><![CDATA[西门子PLC交通灯程序问题]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-19002.html]]></link>
 <description><![CDATA[Latest 50 replies of 西门子PLC交通灯程序问题]]></description>
 <copyright><![CDATA[Copyright(C) 工控人家园]]></copyright>
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 <description><![CDATA[工控人家园]]></description>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[你可以将大于等于，与小于配合使用！！！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-19002#287090.html]]></link>
 <author><![CDATA[lxh3251335]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Fri, 15 Aug 2008 15:37:40 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[Q代表交通灯, 南北向 Q1 Q2 Q3代表红&nbsp;&nbsp;黄&nbsp;&nbsp;绿
Q5 Q6 Q7代表东西方向的红 黄 绿
问题就是 比较指令 必须是大于等于, 不能是大于]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-19002#284591.html]]></link>
 <author><![CDATA[liuxl]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Tue, 12 Aug 2008 06:31:50 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[1.Q都代表什么意思？
2.有什么问题？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-19002#283475.html]]></link>
 <author><![CDATA[sjm213]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Sun, 10 Aug 2008 16:46:48 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[s:23]&nbsp;&nbsp;[s:23]&nbsp;&nbsp;[s:23]&nbsp;&nbsp;[s:23]&nbsp;&nbsp;[s:23]
太简单了?都懒得说呀?
别这样嘛]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-19002#281552.html]]></link>
 <author><![CDATA[liuxl]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Fri, 08 Aug 2008 01:50:18 +0000]]></pubdate>
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