Trade-off between different PLC based architectures of Instrument Control Hardware for ESO ELT class of instrumentation
Date Issued
2022
Author(s)
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.
Coverage
Ground-based and Airborne Instrumentation for Astronomy IX
All editors
Evans, Christopher J.; Bryant, Julia J.; Motohara, Kentaro
Series
Volume
12184
Start page
111
Conferenece
Ground-based and Airborne Instrumentation for Astronomy IX
Conferenece place
Montreal, Quebec, Canada
Conferenece date
July 17-23, 2022
Issn Identifier
0277-786X
Ads BibCode
2022SPIE12184E..32E
Rights
open.access
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