CyberinfraV1, Main, Exploration, bibRecord, 000B16

Evolution of the VLT instrument control system toward industry standards

Identifieur interne : 000B16 ( Main/Exploration ); précédent : 000B15; suivant : 000B17

Evolution of the VLT instrument control system toward industry standards

Auteurs : Mario J. Kiekebusch [Allemagne] ; Gianluca Chiozzi [Allemagne] ; Jens Knudustrup [Allemagne] ; Dan Popovic [Allemagne] ; Gerard Zins [France]

Source :

Proceedings of SPIE, the International Society for Optical Engineering [ 0277-786X ] ; 2010.

RBID : Pascal:11-0004470

Descripteurs français

Pascal (Inist)
- Système réparti, Système UNIX, Station travail, Coordination, Temps réel, Progiciel, Système Linux, Unité contrôle, Astrophysique, Obsolescence, Contrôleur logique programmable, Ethernet, ..

English descriptors

KwdEn :
- Astrophysics, Control unit, Coordination, Distributed system, Ethernet, Linux system, Obsolescence, Programmable logical controller, Real time, Software package, UNIX system, Workstation.

Abstract

The VLT control system is a large distributed system consisting of Linux Workstations providing the high level coordination and interfaces to the users, and VME-based Local Control Units (LCU's) running the VxWorks real-time operating system with commercial and proprietary boards acting as the interface to the instrument functions. After more than 10 years of VLT operations, some of the applied technologies used by the astronomical instruments are being discontinued making it difficult to find adequate hardware for future projects. In order to deal with this obsolescence, the VLT Instrumentation Framework is being extended to adopt well established Commercial Off The Shelf (COTS) components connected through industry standard fieldbuses. This ensures a flexible state of the art hardware configuration for the next generation VLT instruments allowing the access to instrument devices via more compact and simpler control units like PC-based Programmable Logical Controllers (PLC's). It also makes it possible to control devices directly from the Instrument Workstation through a normal Ethernet connection. This paper outlines the requirements that motivated this work, as well as the architecture and the design of the framework extension. In addition, it describes the preliminary results on a use case which is a VLTI visitor instrument used as a pilot project to validate the concepts and the suitability of some COTS products like a PC-based PLCs, EtherCAT⁸ and OPC UA⁶ as solutions for instrument control.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">The VLT control system is a large distributed system consisting of Linux Workstations providing the high level coordination and interfaces to the users, and VME-based Local Control Units (LCU's) running the VxWorks real-time operating system with commercial and proprietary boards acting as the interface to the instrument functions. After more than 10 years of VLT operations, some of the applied technologies used by the astronomical instruments are being discontinued making it difficult to find adequate hardware for future projects. In order to deal with this obsolescence, the VLT Instrumentation Framework is being extended to adopt well established Commercial Off The Shelf (COTS) components connected through industry standard fieldbuses. This ensures a flexible state of the art hardware configuration for the next generation VLT instruments allowing the access to instrument devices via more compact and simpler control units like PC-based Programmable Logical Controllers (PLC's). It also makes it possible to control devices directly from the Instrument Workstation through a normal Ethernet connection. This paper outlines the requirements that motivated this work, as well as the architecture and the design of the framework extension. In addition, it describes the preliminary results on a use case which is a VLTI visitor instrument used as a pilot project to validate the concepts and the suitability of some COTS products like a PC-based PLCs, EtherCAT<sup>8</sup>
 and OPC UA<sup>6</sup>
 as solutions for instrument control.</div>
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Evolution of the VLT instrument control system toward industry standards

Evolution of the VLT instrument control system toward industry standards

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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