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s7200高速計數器指令功用

發布日期:2022-05-18 點擊率:67


s7200高速計數器指令功用
在工程運用中,一般要對一些脈沖信號進行計數,假定脈沖信號的頻率較高,一般計數器因為受掃描周期的影響,不能精確計數,這時就要用到高速計數器。如圖所示的脈沖信號,假定其高電平有些的時刻小于掃描周期,那么運用一般的計數器就無法進行精確的核算。這時咱們就要用到高速計數器指令。

高頻率脈沖信號


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