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PLC信号处理系列之开关量信号防抖FB
2022-07-07 06:59:00 【RXXW_Dor】
很多PLC有DI滤波功能，但是有些PLC没有，工业现场很多时候开关量信号很容易受到外部扰动因素影响产生短暂的误动作，这个误动作有时我们不希望发生。这时候就很有必要需要引入开关量信号防抖功能。另外一些情况我们对信号的延时可能是出于工艺需求，不单单是因为防抖。下面我们看看如何设计防抖FB
1、SMART PLC滤波时间设置
2、开关量防抖FB(FX3U）
3、局部变量接口定义
关于局部变量接口描述可以参看下面的博文有详细讲解：
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