【摘要】 上位PC机对下位机PLC的实时监控主要体现在上、下位机的参数传递。通过参数传递,使上、下位机在过程控制中实现互动。本文阐述了通过PLC与上位机的串口通信技术,实现过程控制中用PC机对下位机PLC进行实时监控,其中的关键技术在于如何将过程参数进行数据转换,实现在上位机与下位机之间正确的参数传递。更多还原

【Abstract】 The real-time control of the high level computer to PLC mainly lies in the parameters transformation.By the parameters transformation,the real-time exchange between the two machines is achieved.This paper investigates the real-time exchange by the communication technology from the serial port of the high level computer to PLC.The real-time control of the high level computer to PLC is achieved in the process control.The key technology is how to exchange the process parameters to the corresponding data in order to achieve the correct parameters exchange between PLC and the high level computer.更多还原