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樓主  發(fā)表于: 2011-07-04 20:30
研究電子稱(chēng)與PLC FX2N232BD通信
以下為電子磅秤的通信協(xié)議：
波特 1200－9600，   數位 8，    奇偶位  1，   代碼 ASCII   , 傳送方式  雙向， 
 

12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
H1  H1,H2H2 ,DATA-- --- -DATAUNIT----UNIT CRLF






打開(kāi)電子秤與PLC時(shí)，FX232BD ,RD指示燈已在不停的閃，代表有接收信號。
PLC程式如下：





為什么轉出來(lái)是13呢？請教各位我那一步出錯了？謝謝了！
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1樓  發(fā)表于: 2011-07-08 19:13
方法TO H0 D8120  通信設定(通信內部設定）。程式寫(xiě)
  1. RS D0 K0 D100 K16
復制代碼因為稱(chēng)為 ASCII 十六位
再
  1. BMOV  D105  D120 K4  具體請到圖片上的地址。。。 我發(fā)不了地址
復制代碼
  1. HEX  D120 D200 K1
復制代碼
  1. HEX  D121 D201 K1   
復制代碼

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