摘要
针对工业通信中可能出现的各种故障,研究并设计一种故障-安全通信协议。首先基于黑色通道的通信结构,设计序列号、CRC校验、时间监视和SIL等级监视等安全措施;其次提出故障安全通信协议的软件实现方案;最终在验证平台上进行测试。实验结果表明,安全通信层可以有效地监测通信状态,保证系统在出现故障时的安全性,满足SIL3等级要求。
A fail-safe communication protocol is presented for fieldbus systems to guarantee the safety of industrial control systems confronting failures. A safety layer is proposed based on ＇black-channel＇ communication structure, in which secure measures including sequence number, CRC checksum, watchdog-timer, and SIL monitor are taken to detect corresponding communication errors. Experiment results show that error rate is reduced to an acceptable level and the SIL3 level requirement is met.
出处
《电子技术应用》
北大核心
2014年第1期115-118,共4页
Application of Electronic Technique
基金
国家863计划项目(2012BAF05B00)资助
