Trade-off between different PLC based architectures of instrument control hardware for ESO ELT class of instrumentation

Christian Eredia; Vincenzo Cianniello; Domenico D'Auria; Vincenzo De Caprio; Enrico Cascone

doi:10.1117/12.2628954

29 August 2022 Trade-off between different PLC based architectures of instrument control hardware for ESO ELT class of instrumentation

Christian Eredia, Vincenzo Cianniello, Domenico D'Auria, Vincenzo De Caprio, Enrico Cascone

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 1218432 (2022) https://doi.org/10.1117/12.2628954
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The Instrument Control Hardware design for the Extremely Large Telescope (ELT) class of instrumentation is largely based on the use of PLCs and EtherCAT fieldbus. The division into multiple subsystems that work independently for the most part encourages the use of different PLC CPUs for each subsystem, all connected to the same Control Network. However, some of the interfaces among the subsystems are more pervasive, and the necessity of a robust method of communication among subsystems arises. In this paper various methods for data exchange between subsystems, based on the use cases, are described and analyzed. Starting from this analysis, a trade-off among several architectures is presented, ranging between two opposite design approaches. All the solutions are compliant to the design requirements, but show key differences in the approach to the parameters presented in the paper.

Citation Download Citation

Christian Eredia, Vincenzo Cianniello, Domenico D'Auria, Vincenzo De Caprio, and Enrico Cascone "Trade-off between different PLC based architectures of instrument control hardware for ESO ELT class of instrumentation", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 1218432 (29 August 2022); https://doi.org/10.1117/12.2628954

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