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 <title><![CDATA[请教一下 西门子1200的OB数据块有什么用啊 ..]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1654081.html]]></link>
 <description><![CDATA[Latest 50 replies of 请教一下 西门子1200的OB数据块有什么用啊 ..]]></description>
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 <description><![CDATA[对的，符号地址没有固定的地址。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1654081#1991157.html]]></link>
 <author><![CDATA[安川电机]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 08 Aug 2018 01:19:42 +0000]]></pubdate>
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 <title><![CDATA[Re:安川电机]]></title>
 <description><![CDATA[可以这么理解么&nbsp;&nbsp;绝对地址就是变量被指定地址了&#160;&#160;比如MD100&#160;&#160;符号变量就是没有被指定地址&#160;&#160;比如系统块之类的]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1654081#1991132.html]]></link>
 <author><![CDATA[天蝎座]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 08 Aug 2018 00:30:48 +0000]]></pubdate>
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 <description><![CDATA[变量表是绝对地址，数据块一般用作符号变量。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1654081#1991123.html]]></link>
 <author><![CDATA[安川电机]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 08 Aug 2018 00:14:02 +0000]]></pubdate>
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 <description><![CDATA[[s:39]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1654081#1991111.html]]></link>
 <author><![CDATA[天蝎座]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 08 Aug 2018 00:02:12 +0000]]></pubdate>
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