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 <title><![CDATA[西门子s7-200 通讯]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1423099.html]]></link>
 <description><![CDATA[Latest 50 replies of 西门子s7-200 通讯]]></description>
 <copyright><![CDATA[Copyright(C) 工控人家园]]></copyright>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[S7-200的网络通讯指令是NETR和NETW]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1423099#1425548.html]]></link>
 <author><![CDATA[sjm213]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Sat, 30 Mar 2013 15:00:53 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[这不是主从站通讯方式嘛？？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1423099#1425267.html]]></link>
 <author><![CDATA[943116554]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Sat, 30 Mar 2013 01:48:45 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[这个是自由端口通讯的子程序调用，你用PPI通讯Q1.7当然错误。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1423099#1425159.html]]></link>
 <author><![CDATA[yaozg]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Fri, 29 Mar 2013 13:05:21 +0000]]></pubdate>
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