关键词: 故障安全控制 硬件组成 系统组态 用户组态

Abstract:

Based on the architecture, hardware organization and functions of fail safe control, the paper introduces the working principle, system modes, user mo des and communication mechanisms of the system, thus provides a technical assurance for the system maintenance, failure processing and secure running.

Key words: （fail safe control, hardware organization, system mode, user mode）