ANALYSIS AND HEURISTIC SCHEDULING FOR PERIODIC MESSAGES IN FF SYSTEM
- Zhou Y(周悦)
- Yu HB(于海斌)
- Wang TR(王天然)
- Zhu BL(朱宝琳)
DOIAbstract
The remote periodic message not only has timing constraints but also often has precedence constrains in Foundation Fieldbus system. In this paper, analysis and heuristic scheduling for remote periodic messages are proposed. Firstly, precedence constrains are considered and described by modifying release times and deadlines of remote periodic messages. Secondly, a heuristic algorithm for building FF schedule time list is proposed to find acceptable scheduling solutions by some simple strategies in order to meet these messages’ timing constraints. Finally, an example of application shows the process of building FF schedule time list
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