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rxx001
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樓主  發(fā)表于: 2017-09-27 20:38
威綸通觸摸屏TK6071IP與禾川HCA2通訊是選用MODBUS RTU嗎?選擇三菱FX1N系列能不能通訊上？有這方面經(jīng)驗的大師們指點(diǎn)一下
zhangqi_1234
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1樓  發(fā)表于: 2017-09-28 11:25
1、禾川HCA2這種PLC沒(méi)用過(guò)，不好評論。
2、如果用FX1N，需要加FX1N-485BD通信板。Fx1N只能作為主站。第1 ，使用RS指令，且編寫(xiě)CRC校驗碼程序。第2、主站與從站最好用四線(xiàn)制連接，避免發(fā)送數據的反射。

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