AT89C51与S7-200PLC串行通信及其应用

摘要

That article describes the 51 MCU and S7 -200 serial communication method, and uses a system composed of microcontroller and PLCto achieve displaying PLC＇s float data in the LCD, and can modify the data on the line and alarm, and the article gives the software and hardware realization.%该文介绍了51单片机与S7-200的串行通信的方法,以及利用单片机和PLC组成的系统实现在LCD上显示PLC采集到的浮点数,在线修改数据和报警,并给出了软硬件实现方法。