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black.ghost
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樓主  發(fā)表于: 2019-11-13 23:26
小弟在學(xué)習PLC，最近遇到串口通信的問(wèn)題，望各位大神指點(diǎn)，謝謝！看資料得知用RS指令進(jìn)行串口通信，我現在是走232與一個(gè)串口設備通信。串口設備的說(shuō)明書(shū)寫(xiě)明數據位、停止為、波特率等信息，也列出了多個(gè)指令，每個(gè)指令都對應有相應的動(dòng)作。問(wèn)題：如果只有一個(gè)指令，那么我可以直接把指令手寫(xiě)進(jìn)去，然后再用RS指令進(jìn)行動(dòng)作，但現在有好幾個(gè)動(dòng)作要做，意味著(zhù)PLC要向串口設備發(fā)送不通的指令，pLC不用處理串口設備反饋的數據。請問(wèn)怎樣實(shí)在？
black.ghost
級別: 探索解密
精華主題: 0
發(fā)帖數量: 10 個(gè)
工控威望: 105 點(diǎn)
下載積分: 468 分
在線(xiàn)時(shí)間: 13(小時(shí))
注冊時(shí)間: 2015-05-05
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1樓  發(fā)表于: 2019-11-14 18:04
謝謝！請問(wèn)能說(shuō)詳細一點(diǎn)嗎？能不能做個(gè)簡(jiǎn)單的例子？

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