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 <title><![CDATA[求助]]></title>
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 <description><![CDATA[基本原理是：A方案:PLC写入，通讯对象清除；B方案:通讯对象写入，PLC清除。例如PLC每隔2秒往D0中写入1，通讯对象每隔3秒对D0清零，这时如果PLC检测到D0中值为1的时间超过3秒，则判定通讯对象掉线。 [s:21]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1727946#2261681.html]]></link>
 <author><![CDATA[w45062099]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Mon, 28 Feb 2022 15:48:56 +0000]]></pubdate>
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