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錦繡明天
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樓主  發(fā)表于: 2018-04-22 21:16
圖片：
近日見(jiàn)一段程序控制伺服正反轉，正轉為DDRⅤl  K99999999   D140  Y00  Y01，反轉為DDRⅤl-99999999 D140 Y00  Y01但查整段程序并沒(méi)有控制Y1的接通或斷開(kāi)的程序就實(shí)現了伺服正反轉了，何解？
[ 此帖被錦繡明天在2018-04-22 21:37重新編輯 ]
Lu
langui
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1樓  發(fā)表于: 2018-04-23 08:28
首先，你不用去查Y1是在哪里輸出的，因為DRVI和DRVA定義好兩個(gè)輸出點(diǎn)之后,PLC就自己會(huì )輸出的而不用你再單獨定義一個(gè)需要輸出的點(diǎn)。另外，DRVI正反轉只由脈沖的+ -號決定，DRVA正反轉由當前位置決定，當定位點(diǎn)大于當前位置就正轉，當定位點(diǎn)小于當前位置就反轉。

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