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niujulin
級別: 略有小成
精華主題: 0
發(fā)帖數量: 255 個(gè)
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下載積分: 1732 分
在線(xiàn)時(shí)間: 344(小時(shí))
注冊時(shí)間: 2008-08-02
最后登錄: 2025-02-25
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樓主  發(fā)表于: 2019-08-07 16:29
現在改造一臺設備用到編碼器計數,使用比較復位DHSCR指令時(shí),沒(méi)有安照下述運行。當S1等于S2時(shí),D沒(méi)有被復位。以前也用過(guò)但沒(méi)有出過(guò)類(lèi)似的問(wèn)題。大師們有遇到類(lèi)似的問(wèn)題嗎?或者能提供一些檢查的辦法。
1. 32位運算(DHSCR)
當S2中指定的高速計數器(C235~C255)的當前值,變成比較值[ S+1,S ]時(shí)(比較值K200時(shí)為199
→200或201→200),無(wú)論運算周期多少,位軟元件D被復位(OFF),與運算周期無(wú)關(guān)。這個(gè)指令是接著(zhù)高
速計數器的計數處理之后執行比較處理的指令。
niujulin
級別: 略有小成
精華主題: 0
發(fā)帖數量: 255 個(gè)
工控威望: 345 點(diǎn)
下載積分: 1732 分
在線(xiàn)時(shí)間: 344(小時(shí))
注冊時(shí)間: 2008-08-02
最后登錄: 2025-02-25
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1樓  發(fā)表于: 2019-08-08 12:22
整個(gè)程序僅用C251一個(gè)計數器,不存在頻率下降

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