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sjbandmm
級別: 略有小成
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發(fā)帖數量: 243 個(gè)
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在線(xiàn)時(shí)間: 171(小時(shí))
注冊時(shí)間: 2008-08-23
最后登錄: 2025-06-07
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樓主  發(fā)表于: 2019-06-05 23:43
圖片:
圖片:
6eS7 231-4HD32-0AB0 模塊,通道0,配置為4-20mA電流輸入,顯示32767,超限,配置為0-20mA顯示值為13,萬(wàn)用表測量電壓為2.3V(萬(wàn)用表通過(guò)測量24V校驗應該是沒(méi)有問(wèn)題的),模塊電流采樣電阻為250歐姆,那么這時(shí)電流為2300/250=9.2mA,數值應該是(9.2-4)/16*27648=8986。這個(gè)模塊是電工安裝的,我不在現場(chǎng),是安裝的有問(wèn)題,還是模塊硬件設置有問(wèn)題呢?
這個(gè)模塊的說(shuō)明書(shū)我也沒(méi)找到,只有一個(gè)樣本,照樣本畫(huà)的圖紙,是不是硬件上還有什么我不知道的撥碼等設置?
sjbandmm
級別: 略有小成
精華主題: 0
發(fā)帖數量: 243 個(gè)
工控威望: 413 點(diǎn)
下載積分: 999 分
在線(xiàn)時(shí)間: 171(小時(shí))
注冊時(shí)間: 2008-08-23
最后登錄: 2025-06-07
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1樓  發(fā)表于: 2019-06-06 12:06
估計是我接線(xiàn)有問(wèn)題,傳感器是二線(xiàn)的,我是24V+先入的PLC ,傳感器負端回到24-的,估計模擬量輸入端與電源端未隔離,雖然模擬量端口輸入電壓只有2.3V,但相對于電源-,輸入端是24V,可能造成采集的問(wèn)題。我還沒(méi)改接線(xiàn)。沒(méi)最終確定原因,估計是這個(gè)問(wèn)題。

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