Supporting real-time distributed computer-controlled systems with multi-hop P-NET networks

• Type: Article in International Scientific Journal
• Date: 1999

Authors

tovar, e (Author) Other; vasques, f (Author) FEUP; burns, a (Author) Other

Journal

Title: Control Engineering Practice

Vol. 7

Pages: 1015-1025

ISSN: 0967-0661

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 21 Citations

ISI Web of Science

Scopus - 23 Citations

COMPENDEX

Other information

Authenticus ID: P-001-3PS

DOI: 10.1016/s0967-0661(99)00073-8

Abstract (EN): Fieldbus communication networks aim to interconnect sensors, actuators and controllers within process control applications. Therefore, they constitute the foundation upon which real-time distributed computer-controlled systems can be implemented. P-NET is a fieldbus communication standard, which uses a virtual token-passing medium-access-control mechanism. In this paper pre-run-time schedulability conditions for supporting real-time traffic with P-NET networks are established. Essentially, formulae to evaluate the upper bound of the end-to-end communication delay in P-NET messages are provided. Using this upper bound, a feasibility test is then provided to check the timing requirements for accessing remote process variables. This paper also shows how P-NET network segmentation can significantly reduce the end-to-end communication delays for messages with stringent timing requirements.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11