PLC内部数据低成本的显示设计:本文欧姆龙CJ1M为例,采用低成本LED数码管作为数据显示设备,动态显示PLC内部数据的方法,该方法简单实用,适于实验教学和工程人员的现场操作。关键词 PLC;数码管;动态选通;扩展Abstract:In this article, the cheap LEDs were selected to display the interior data of PLC. Four LEDs were chosen dynamically by turn to show the data in one channel. After extending 8 I/O can show the data in 32 channels(512 bits). The design was easy and pratical. The mothod can be used in experiment teaching and industrial control.Key words: PLC; LED; Dynamically chose; Extend
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