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围绕具有较高性能价格比的小型分布式控制系统，着重介绍了该系统以ＩＢＭ—ＰＣ为上位机和以ＳＴＤ工控机为现场控制器６９软件模块和功能，以及系统的联网原理和方法。
Focusing on the small-scale distributed control system with high performance-price ratio, this paper mainly introduces the software modules and functions of the system with IBM-PC as host computer and STD-based industrial controller as field controllers, and the networking principle and method of the system.