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2024-05-26 - 14:03

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2023-11-12 12:00

Open Source License Obligations Checklists even better now

Import the checklists to other tools, create context diffs and merged lists

2023-03-01 12:00

Embedded Linux distributions

Results of the online "wish list"

2022-01-13 12:00

Phase #3 of OSADL project on OPC UA PubSub over TSN successfully completed

Another important milestone on the way to interoperable Open Source real-time Ethernet has been reached

2021-02-09 12:00

Open Source OPC UA PubSub over TSN project phase #3 launched

Letter of Intent with call for participation is now available

Real Time Linux Workshops

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13th Real-Time Linux Workshop from October 20 to 22 at the Faculty of Electrical Engineering, Czech Technical University in Prague

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Evaluation of embedded virtualization on real-time Linux for industrial control system

Sanjay Ghosh, ABB Corporate Research, Bangalore
Pradyumna Sampath, ABB Corporate Research, Bangalore

Real time control applications in industrial control systems have long been trusted to run on specially designed dedicated embedded hardware like PLCs, controllers etc. The non real-time functionalities of the automation systems like engineering and HMI are separately executed on independent hardware. Over the last decade, advancements in RTOS, technologies such as virtualization and availability of more powerful COTS hardware have enabled the recent trends where industrial PCs are being proposed to replace the hardware controller units. This paper describes our prototype implementation of a control system on a general purpose embedded hardware based on Linux rt-preempt. In our setup, the control logic is executed by a runtime control engine in a virtual machine environment alongside the standard engineering framework, standard HMI, data acquisition, EtherCAT based IO and fieldbus modules on a uni-processor system without impacting the deterministic performance. The paper discusses in detail the methodologies used, our experiences and the lessons learnt in evaluating the performance of the prototype in terms of the test setup, boundary conditions and the parameters measured under typical load conditions as in real industrial applications.