Research and Achieve of the Function Safety Communications Methods Based on EPA
WANG Hao,WANG Yan-bang,WANG Ping (Key Laboratory of Network Control and Intelligent Instrument, Ministry of Education,Chongqing University of Posts and Telecommunications, Chongqing 400065, China) Abstract:In this paper, EPA protocol stack in the study, based on the analysis of industrial controlling networks, communication failures and function of the relationship between security mechanism proposed functions safety communication protocol model, the establishment of a typical functional safety system designed for safety communication functions EPA process, the realization of the EPA to expand the functional safety protocol layer. Test results show that the EPA through the application layer has been added to EPA functional entities, as well as security applications will visit EPA communications in the packet data unit to carry out the expansion of users to achieve key safety measures to meet the safety requirements of communications related fields to protect the EPA system safety and reliability. Key words:EPASafety;functional safety communication;IEC61508;IEC61784-3 |