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 <title><![CDATA[再次求教PLC问题]]></title>
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 <description><![CDATA[有缺点吗？是不是不能实时控制输出？如果要实时控制，是不是就要用直接访问I/O 方法？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-117817#1114434.html]]></link>
 <author><![CDATA[xcamel]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 24 Aug 2011 09:41:11 +0000]]></pubdate>
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 <description><![CDATA[过程IO，能保证在同一个扫描周期内的值相同，且速度较快。]]></description>
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 <author><![CDATA[cvlsam]]></author>
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 <pubdate><![CDATA[Wed, 24 Aug 2011 09:10:00 +0000]]></pubdate>
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