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樓主  發(fā)表于: 2018-09-07 17:17
圖片:
第一次做MODBUS程序,用FX3U帶FX3U-485-ADP-MB做MODBUS主站,讀取一個(gè)壓力變送器的峰值
FX3U編程如下(這個(gè)程序是打電話(huà)至三菱客服得到的建議,做最簡(jiǎn)單的程序進(jìn)行測試)
LD M8411
MOV H1091 D8420
MOV H1 D8421

LD M101
ADPRW H1 H3 K5 K2 D100

壓力變送器的峰值的MODBUS地址40005/6



程序運行后通訊錯誤代碼212,出錯詳細內容770,打電話(huà)去三菱客服咨詢(xún)得到的答復是PLC發(fā)送功能正常,但壓力變送器反饋的數據格式不對,在此想請問(wèn)各位大佬:
1.    壓力變送器的MODBUS地址40005 在FX3U的編程中可以取K5嗎?
2.    我試過(guò)將ADPRW H1 H3 K5 K2 D100中的K5換為K6,程序運行就不會(huì )出現錯誤代碼,但是D100中沒(méi)有數據,我這個(gè)程序運行的有問(wèn)題嗎?
[ 此帖被tvbaobao在2018-09-07 17:46重新編輯 ]
ricinlhx
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1樓  發(fā)表于: 2018-09-10 14:08
接個(gè)串口調試的,看看返回數據是啥
青島拓能自動(dòng)化 15908921588  QQ:410295596 愿與從事染色、印花的朋友握手。

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