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收到的報文如下, 通訊方式是 9600 N 8 2 .一直搞不明白是昨個校驗的.高手不要飄過
C0 00 40 20 00 00 7F 22 10 6D
80 00 00 00 69 00 09 00 0C 6C  
C1 00 00 00 69 00 09 00 0C 2D  
C4 00 02 00 69 00 09 00 00 26
84 00 00 00 00 3C 30 3D 02 37
C5 00 00 00 00 3C 30 3D 02 76
85 00 00 00 00 7F 4F 64 04 55
C6 01 00 00 00 7F 4F 64 04 17  
86 00 00 00 00 00 7F 64 06 1B
C7 00 00 00 00 00 7F 64 46 1A
87 00 00 00 00 7F 7F 22 02 27
C8 00 00 00 00 7F 7F 22 02 68  
C0 00 40 20 00 00 7F 22 10 6D
80 00 00 00 69 00 09 00 0C 6C


C0 00 40 60 00 00 7F 22 10 2D  
80 00 00 00 69 00 09 00 0C 6C
C1 00 00 00 69 00 09 00 0C 2D  
C4 00 02 00 69 00 09 00 00 26
84 00 00 00 00 3C 30 3D 02 37
C5 00 00 00 00 3C 30 3D 02 76  
85 00 00 00 00 7F 4F 64 04 55
C6 03 00 00 00 7F 4F 64 04 15
86 00 00 00 00 00 7F 64 06 1B
C7 00 00 00 00 00 7F 64 46 1A
87 00 00 00 00 7F 7F 22 02 27
C8 00 00 00 00 7F 7F 22 02 68  

走過路過,千萬不要錯過.

發(fā)送的是 C開頭的  其它是返回數(shù)據

MODBUS協(xié)議定義了4種基本數(shù)據類型：可讀寫位數(shù)據，只讀位數(shù)據，只讀16位數(shù)據，可讀寫16位數(shù)據。這些數(shù)據分別被稱為線圈狀態(tài)，輸入狀態(tài)，輸入寄存器，保持寄存器

分析一下結果如何?

C4 00 02 00 69 00 09 00 00 26
C4 01 00 00 69 00 09 00 00 25 //主泵燈
C4 03 02 00 69 00 09 00 00 25  //呼叫燈
C4 01 22 00 69 00 09 00 00 07 //流流燈
C4 41 02 00 69 00 09 00 00 67 //加熱 主泵 卸壓燈
C4 01 42 00 69 00 09 00 00 67//主泵 卸壓 放水
C4 01 02 00 69 08 09 00 40 6F //冷卻主泵卸壓 燈

有二個數(shù)據沒有變C4  69 前面三個數(shù)據 69后面三個數(shù)據 及后面二組數(shù)據會變化

最后的貌似是 校驗

期待高手出現(xiàn)

可以用校驗工具校驗下，然后對說明

樓主有結果了嗎  分享下~~