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 <title><![CDATA[请教大师们一个关于三菱PLC的问题]]></title>
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 <description><![CDATA[Latest 50 replies of 请教大师们一个关于三菱PLC的问题]]></description>
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 <description><![CDATA[这个问题很容易。。。多看看手册吧 [s:21]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-68765#819360.html]]></link>
 <author><![CDATA[a200905]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 30 Jun 2010 18:55:28 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[多谢高手们指点！小弟不胜感激]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-68765#819332.html]]></link>
 <author><![CDATA[lx2008dream]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 30 Jun 2010 16:15:55 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[2楼说得很明白了]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-68765#818729.html]]></link>
 <author><![CDATA[peidegin]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 30 Jun 2010 03:10:56 +0000]]></pubdate>
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 <description><![CDATA[[quote]引用第1楼jonnyhsieh于2010-06-30 07:37发表的&nbsp;&nbsp;:
程序做Hold動作.
[/quote]
扩展来说，就是用一个M点带一个输出，而安全光栅串在这个M点和输出之间。这样当安全光栅动作时会停止输出，但不影响M点，当安全光栅复位后输出立即执行~]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-68765#818613.html]]></link>
 <author><![CDATA[sjm213]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 30 Jun 2010 00:44:44 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[程序做Hold動作.]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-68765#818580.html]]></link>
 <author><![CDATA[jonnyhsieh]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 29 Jun 2010 23:37:01 +0000]]></pubdate>
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