空模塊LM201
采用485總線結構常見的幾種通訊故障有下面幾種？
1、通訊不上，無反應。
2、可以上傳數據，但不可以下載數據。
3、通訊時系統提示受到干擾，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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