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 <title><![CDATA[光电信号自锁问题]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525.html]]></link>
 <description><![CDATA[Latest 50 replies of 光电信号自锁问题]]></description>
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 <description><![CDATA[工控人家园]]></description>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[常开并常开；常开串常闭]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1206721.html]]></link>
 <author><![CDATA[zmy450365]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Thu, 09 Feb 2012 09:56:37 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[这不就是个简单的启停电路吗？楼主还用PLC]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1206642.html]]></link>
 <author><![CDATA[wananjushi]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Thu, 09 Feb 2012 07:01:06 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[&nbsp;&nbsp; 加&nbsp;&nbsp; 油]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1206480.html]]></link>
 <author><![CDATA[baolizcy]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Thu, 09 Feb 2012 03:03:37 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[起保停电路，电工学里学过的啊！！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1201590.html]]></link>
 <author><![CDATA[dhc1982]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Sun, 29 Jan 2012 04:55:12 +0000]]></pubdate>
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 <description><![CDATA[[s:28] 看下要得不]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1201040.html]]></link>
 <author><![CDATA[wxz123456]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Thu, 26 Jan 2012 06:00:36 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[不错好好学习！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1200436.html]]></link>
 <author><![CDATA[xuzhiyuansw]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Fri, 20 Jan 2012 14:52:20 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[正規應該用 安全繼電器 Safety Relay]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1200112.html]]></link>
 <author><![CDATA[luoyingdong]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Thu, 19 Jan 2012 06:57:30 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[按你的说法是，光电不被挡住电路要通，中间继电器使用一组常闭点来控制电路的闭合断开，其实就是一行程开关。希望对你有帮助。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1199707.html]]></link>
 <author><![CDATA[wnj106]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Tue, 17 Jan 2012 16:09:18 +0000]]></pubdate>
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 <description><![CDATA[[s:21]&nbsp;&nbsp;[s:21]&nbsp;&nbsp;[s:21]&nbsp;&nbsp;[s:21]&nbsp;&nbsp;[s:21]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1199648.html]]></link>
 <author><![CDATA[dgredboy]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Tue, 17 Jan 2012 13:48:18 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[看看是不是你要的...]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1195571.html]]></link>
 <author><![CDATA[aa22284]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Sun, 08 Jan 2012 09:23:15 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[想要自锁住]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1195570.html]]></link>
 <author><![CDATA[ytmsymlf]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Sun, 08 Jan 2012 09:19:47 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[s:39]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1195494.html]]></link>
 <author><![CDATA[sexydiban]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Sun, 08 Jan 2012 05:33:10 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[这不就是个简单的启停电路吗？楼主还用PLC？用来看的呀]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1194722.html]]></link>
 <author><![CDATA[shidegang]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Fri, 06 Jan 2012 08:02:29 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[s:28]&nbsp;&nbsp;[s:28]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1193276.html]]></link>
 <author><![CDATA[yuchong]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Tue, 03 Jan 2012 08:34:26 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[我并不是打击楼主，但这本就是一个基本的起保停控制，连这个都搞不好，不知你是怎么学会PLC的。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1193019.html]]></link>
 <author><![CDATA[842386283]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Mon, 02 Jan 2012 15:24:42 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[楼主是不是在办公室坐得太久了，反而丢了基础的东西。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1192942.html]]></link>
 <author><![CDATA[客居他乡]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Mon, 02 Jan 2012 13:17:41 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[当光电不被遮住时，想要自锁住，这不是问题，
问题是这样的电路就要再加一个停止开关，但是时间断电器，让自锁的中间继电器一段时间或是得到停止开关信号后复位。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1192904.html]]></link>
 <author><![CDATA[yeyhx]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Mon, 02 Jan 2012 11:51:34 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[看来你真大头。自锁了怎么关？这本身就是个最简单的启动停止控制。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-134525#1192890.html]]></link>
 <author><![CDATA[大地]]></author>
 <category><![CDATA[三菱工控论坛]]></category>
 <pubdate><![CDATA[Mon, 02 Jan 2012 11:06:46 +0000]]></pubdate>
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