本文描述了Micro DCS 中多功能控制器的设计要点和结构原理。该控制器用两片高性能的16位单片机8097为核心构成了双机冗余系统,文中重点讨论了故障自诊断系统的建立原则及自诊断和双机切换的实现方法,包括其硬件结构和软件设计思路,并从理论上论证和用实验证明了该控制器的高可靠性及良好的无中断控制特性。 This article describes the design of multi-function controller in Micro DCS design principles and structure. The controller uses two high-performance 16-bit single-chip microcomputer 8097 as the core to form a dual-redundant system. In this paper, the establishment principle of fault self-diagnosis system and the realization method of self-diagnosis and dual-plane switching are discussed in detail, including its hardware structure and software Design ideas, and theoretically demonstrated and experimentally proved the high reliability of the controller and good non-stop control features.