A carregar...
Publicação
Engineering real-time applications with WorldFIP: tools and analysis
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 92.77 KB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
WorldFIP is standardised as European Norm EN 50170 - General Purpose
Field Communication System. Field communication systems (fieldbuses) started to be
widely used as the communication support for distributed computer-controlled systems
(DCCS), and are being used in all sorts of process control and manufacturing
applications within different types of industries. There are several advantages in using
fieldbuses as a replacement of for the traditional point-to-point links between
sensors/actuators and computer-based control systems. Indeed they concern economical
ones (cable savings) but, importantly, fieldbuses allow an increased decentralisation
and distribution of the processing power over the field. Typically DCCS have real-time
requirements that must be fulfilled. By this, we mean that process data must be
transferred between network computing nodes within a maximum admissible time span.
WorldFIP has very interesting mechanisms to schedule data transfers. It explicit
distinguishes to types of traffic: periodic and aperiodic. In this paper we describe how
WorldFIP handles these two types of traffic, and more importantly, we provide a
comprehensive analysis for guaranteeing the real-time requirements of both types of
traffic. A major contribution is made in the analysis of worst-case response time of
aperiodic transfer requests.
Descrição
Palavras-chave
Contexto Educativo
Citação
Editora
Instituto Politécnico do Porto. Instituto Superior de Engenharia do Porto. Universidade do Porto.