系统介绍labview的RS232,RS485串口等原理。以及labview中串口的编程源程序截屏和参数设置。-System labview introduction of RS232, RS485 serial port, such as the principle. As well as in the serial programming labview Screenshots and source parameters.

RS485协议，在工业控制等环境中，常会有电气噪声干扰传输线路，使用RS-232 通讯时经常 因外界的电气干扰而导致信号传输错误；另外，RS-232 通讯的最大传输距离在不增加缓冲 器的情况下只可以达到15 米。为了解决上述问题，RS-485/422 通讯方式就应运而生了。-RS485 protocol, in the industrial control environment, often have a transmission line of electrical noise in