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 <description><![CDATA[Latest 50 replies of 西门子PLC中PID问题请假]]></description>
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 <description><![CDATA[这要看你被控设备需要什么信号 模拟量&nbsp;&nbsp;脉宽 甚至频率]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1655178#1997821.html]]></link>
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 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 05 Sep 2018 04:06:56 +0000]]></pubdate>
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 <description><![CDATA[就是控制启停，比如说加热器和风扇，就可以写成高电平加热器启动，低电平风扇启动是吧？那模拟量大神你知道是什么意思吗，这个是数值[quote]引用第1楼bdmogui于2018-08-31 11:22发表的&nbsp;&nbsp;:
脉宽控制电子器件通断
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 <author><![CDATA[会飞的雨]]></author>
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 <pubdate><![CDATA[Fri, 31 Aug 2018 13:39:36 +0000]]></pubdate>
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 <author><![CDATA[bdmogui]]></author>
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 <pubdate><![CDATA[Fri, 31 Aug 2018 03:22:53 +0000]]></pubdate>
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