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Pearl 96 pp 29–40Cite as

Wirtschaftliche Fehlertoleranz in Funktionsblock-konfigurierbaren Feldstationen

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Part of the book series: Informatik aktuell ((INFORMAT))

Abstract

The tendency to design the system-software of modern Programmable Logic Controllers (PLCs) on the basis of the features of well known realtime operating systems has influenced the IEC 1131 Standard for PLCs with respect to the inclusion of an explicit task model. This is a signiflcant step towards the inclusion of fault-tolerance, e.g. tolerating the missing of task-deadlines. The constructs for exception-handling and reconßguration of modern realtime-languages, e.g. PEARL 90, are well suited for a transparent and dependable implementation of fault-tolerance mechanisms in PLCs.

On the basis of these concepts, this paper discusses solutions for the integration of fault-tolerance with respect to the function-block diagram (FBD)-language, which is of particular interest with respect to the certification of realtime-software for PLCs in safety critical systems. A prototype implementation of the PEARL-PLC will be used for the verification of the outlined mechanisms using adaptive control as typical task-scenario.

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Authors and Affiliations

  1. Institut für Automatisierungstechnik, Universität Bremen, Kufsteiner Straße, 28359, Bremen, Germany

    H. J. Beestermöller

  2. Institut für Automatisierungstechnik, Universität Bremen, Kufsteiner Straße, 28359, Bremen, Germany

    G. Thiele

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  1. H. J. Beestermöller
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  2. G. Thiele
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  1. Regionales Rechenzentrum der Universität Erlangen-Nürnberg, Martensstraße 1, D-91058, Erlangen, Germany

    Peter Holleczek

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Beestermöller, H.J., Thiele, G. (1997). Wirtschaftliche Fehlertoleranz in Funktionsblock-konfigurierbaren Feldstationen. In: Holleczek, P. (eds) Pearl 96. Informatik aktuell. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60535-2_4

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  • DOI: https://doi.org/10.1007/978-3-642-60535-2_4

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-61641-2

  • Online ISBN: 978-3-642-60535-2

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