本文介绍了在舞台吊杆控制系统中，利用PLC的串行通信模块完成位置反馈信号采集和人机界面数据交换。
This paper mainly introduces signal acquisition of height-feedback and data exchange of HMI using PLC's serial communication module in stage suspender; control system.
以串行通信方式实现采集数据的半双工无线传输，适合于低功耗短距离无线数据采集，并具有抗干扰能力强等优点；
With the serial communication it realizes the semiduplex wireless transmission, adapts to wireless data acquisitions of low power and short distance, and resists disturbance well.
针对传统工业现场监控方式的不足，设计了一种基于微机串行通信方式的数据采集和控制系统。
Aim at the insufficiency of traditional way of monitoring in industry field, designed a data acquisition and control system based on serial port communication.
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