The models on real-time messages arrival and non-real-time messages arrival are presented in this paper. The performances including token rotation time and stability conditions on network are investigated when token bus network is used in distributed control system. 建立了实时信息与非实时信息到达模型,并分析了完全不对称令牌总线网络用于控制系统时的性能,主要包括令牌循环时间和网络稳定条件。
Impact of Token-target-rotation Time on Message Transaction Cycle Time in PROFIBUS System 令牌目的循环时间T(TR)对现场总线PROFIBUS测控周期的影响
The conditions that the parameters including high-priority token hold time and target token rotation time must satisfy are given. 给出了参数(包括高优先级令牌持有时间和低优先级目标令牌循环时间)设置时应满足的条件。
Furthermore, schedule ability analysis of the high and low priority messages based on response time was presented. The principle of setting target token rotation time was also brought forward. 在此基础上,给出了总线信息的消息循环时间、令牌循环时间和总线效率的计算方法,以及高、低优先级信息基于响应时间的可调度性分析,并给出了总线目标令牌循环时间的设定原则。