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程序判断单圈绝对值编码器是否有断线故障 | 找知识-找PLC
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程序判断单圈绝对值编码器是否有断线故障

• SIMATIC S7-300(F)/S7-400(F/H/FH)

我看有的伺服带编码器断线报警。不知道他是什么原理。我最近用到一个11位的单圈绝对值编码器，实际用的时候是按照多圈使用的。我判断编码器是否过零利用的是前后差值的办法，如果差值大于2000，那么认为过0，圈数进行加减。如果断线也利用差值的话，我觉得不太靠谱，万一断的是bit0这位呢？
编码器是格雷码并行输出的。
不知道大家有没有什么好的办法来实现呢？

问题补充：
原理是这样的，但是估计PLC在扫描的时候估计还是会出现不连续的两个值。我在监视的时候，没有看见过连续的两个值啊。不知道PLC能不能反应过来

最佳答案

格雷码任一时刻只能有一位电平发生变化，掉线就说明有2位同时发生了电平跳变，且会导致该数值不会介于前后2个编码值中间。
     你把简单的问题想复杂了，把线拧紧就是了。掉线那不是我们可以控制的。

提问者对于答案的评价：
伺服编码器的断线故障时怎么检测啊？

原创文章，作者：more0621，如若转载，请注明出处：https://www.zhaoplc.com/plc226352.html

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