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王德位
級別: 略有小成
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樓主  發(fā)表于: 2017-09-01 09:54
PLC沒(méi)有問(wèn)題，編碼器也沒(méi)有問(wèn)題，接線(xiàn)也沒(méi)有錯，出現C251突然不計數了，用C246分別計X0和X1，正常；在對C253計數，也正常；最后在線(xiàn)對PLC存儲器清0才解決問(wèn)題
wangnaizhi
級別: 工控俠客
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1樓  發(fā)表于: 2017-09-01 13:56
說(shuō)不清這個(gè)東西  反正用舊的PLC的時(shí)候  我都會(huì )把PLC先恢復出廠(chǎng)設置  誰(shuí)知道之前的PLC內部的參數有沒(méi)有動(dòng)過(guò)
zhangqi_1234
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2樓  發(fā)表于: 2017-09-06 11:54
C251、C253等都是外部高速計數器，我好像記得同時(shí)使用對計數頻率上限有影響，導致計數頻率下降。

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