带上位机的PLC控制大型粮食输送系统

Large grain conveying system with the upper control computer

阐述了一大型粮库输送系统计算机和信息技术系统的构成及功能,系统分析了PLC控制的3台设备的电动机原理图、PLC外部接线图和梯形图,介绍了其采用的通信网络。

This paper presents the composition and function of the computer and communication system for conveyor system at a large grain depot as well as the principle, connection and ladder diagrams of the PLC. Also the used communication network is given.