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plc*题立即I⼀O指令有何特点，应用于什么场合

2025-03-31 18:53:16

推荐回答（2个）

回答1：

立即IO指令，执行时会立即输出刷新或者采集输入，省去了PLC扫描周期的限制，执行更加迅速。适用于一些需要迅速执行动作的地方。

望采纳。。。。。

回答2：

类似于单片机中外部中断的作用吧(猜测)，它是Io口实现的，比正常扫描执行的响应快些。

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