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lzhpsky
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樓主  發(fā)表于: 2024-01-04 22:27

  


    

如上圖,上圖是通訊連接圖和實(shí)物圖,現在1241的通訊卡,指示燈一個(gè)也不亮,但是主機還可以識別到1241,因為CPU的診斷紅燈沒(méi)有亮,但是這個(gè)卡指示燈不亮。我用電腦端的MODSCAN做主站,1200做從站,從站設為地址2,但是電腦端收不到數據上來(lái),現在不知道是程序的問(wèn)題呢,還是通信卡就是壞的。。。我找了200SMART的主機做個(gè)一個(gè)測試,可以輕松讀數據上來(lái),但是換這個(gè)1200就是讀不上數據來(lái),這是什么原因,謝謝大家
[ 此帖被lzhpsky在2024-01-05 08:07重新編輯 ]
wlmissyou
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1樓  發(fā)表于: 2024-01-04 22:58
第一,接線(xiàn)不正確,第二,如果無(wú)法確認1241是否損壞,可以先讓PLC做主站來(lái)測試。第三,確認1241沒(méi)問(wèn)題后,再讓PLC做從站。

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