上位机、下位机之间通过RS232C串行通讯接口总线交换数据。

The communication between host computer and slave computers is accomplished through their serial ports, RS232C.

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上位机、下位机之间通过RS232C串行通讯接口总线交换数据。

The communication between host computer and slave computers is accomplished through their serial ports, RS232C.

youdao