One or several PLCs and PCs are connected to the system,and the PCs play the role of the original programmer and man-machine interface operation station.This is a new trend in the 1990s,which brings business opportunities for system integration.At the same time,programming software and human Machine interface software(monitoring software or configuration software)and software interface(or driver software)have also been developed.
一个或若干PLC与PC机联出系统，PC机起到原编程器及人机界面操作站的作用，这20世纪90年代的新潮流，这样为系统集成带来了商机，同时编程软件和人机界面软件(监控软件或称组态软件)及软件接口(或称驱动软件)也得到了发展。
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