空模塊LM201
采用485總線結(jié)構(gòu)常見的幾種通訊故障有下面幾種？
1、通訊不上，無反應(yīng)。
2、可以上傳數(shù)據(jù)，但不可以下載數(shù)據(jù)。
3、通訊時系統(tǒng)提示受到干擾，或者不通訊時通訊指示燈也不停地閃爍。
4、有時能通訊上，有時通訊不上，有的指令可以通，有的指令不可以通。
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