“AS-i安全工作”技术机理及其工程应用

AS-i safety at work technology and its application

介绍了底层设备级现场总线执行器传感器接口AS-i的安全工作技术的工作原理和组态软件Asimon的编程方法,分析了其满足和实现欧洲机器安全控制标准EN954-1的措施。基于AS-i安全工作技术完成了一个在电力行业现场总线控制系统中的实际工程应用项目的设计,详细解释了系统硬件组成和组态程序设计。实验室调试的结果表明:使用安全型的紧急停车按钮或单传感器输入触点的安全型从站可实现EN954-1中2类以下的安全等级要求;使用双传感器输入触点的安全型从站,则系统保护可以达到EN954-1标准中4类安全等级的要求。AS-i独特的安全工作技术在整个现场总线控制系统的设备安全和人身安全的保护中实现了较高的效能。

The working principle of ＂AS-i（Actuator Sensor-interface） safety at work＂ technology for field devices at fieldbus level and its configuration software Asimon are introduced. Its measures to meet EN954-1 standard for machine safety control is analyzed. A fieldbus control system for a real project of electrical industry is designed based on AS- i safety at work technology. The system hardware structure and software configuration are detailed. Experimental result shows that, the safety category 2 of EN954-1 can be met by using emergency button or safety slave station with single sensor input,while category 4 can be met by using safety slave station with double sensor inputs. AS-i safety at work technology plays a more efficient role in fieldbus control system for devices and person safety.