摘要： 针对常用安全分析技术应用中存在的不足，提出一种基于过程控制事件框图(PCED)的计算机过程控制系统安全分析方法。该方法根据系统的特点建立描述其控制逻辑的PCED模型，构造“动作-部件-变量“的影响路径，通过算法分析控制逻辑的安全性。以计算机控制化学反应过程系统为例用该方法进行安全分析。

关键词: 过程控制系统, 安全分析, 控制逻辑, 过程控制事件框图

Abstract: Aiming at the deficiencies in applying traditional safety analysis technologies, this paper presents a safety analysis method based on Process Control Event Diagram(PCED) for control logic in Computer Process Control Systems(CPCS). The PCED of its control logic is set up according to the characteristics of the system, the influencing path of “Action-Component-Variable” is erected, and the safety of the control logic is analyzed by the algorithm. The method is illustrated by a case study of the computer-controlled chemical process system.

Key words: Process Control Systems(PCS), safety analysis, control logic, Process Control Event Diagram(PCED)

中图分类号: 

• TB114.3