Dates and Events:
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OSADL Articles:
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
2022-07-11 12:00
Call for participation in phase #4 of Open Source OPC UA open62541 support project
Letter of Intent fulfills wish list from recent survey
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 |
COOL - Compact OSADL Online Lectures - March 2025 edition
Hannover Messe 2025
Real Time Linux Workshops
1999 - 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009 - 2010
Ninth Real-Time Linux Workshop on November 2 to 4, 2007, in Linz, Austria
Exploiting the hard realtime features of PROFINET by a realtime capable Linux
Karl-Heinz Krause
A PROFINET system build with ERTEC ASICs allows to keep the nodes of a net synchronized with an accuracy below 1µsec. While still allowing regular IP-communication, it also guarantees the timely arrival of cyclic messages below that mark. These features are particulary required for the motion control part of an automation systems. The talk starts with browsing through the essentials of PROFINET and the ERTEC ASIC which make up for realtime the capabilities. When connecting such an ethernet controller as the ERTEC to a host processor, the HW-interfaces also have a significant impact on the realtime behavior. These issues are also discussed. Finally all the measures for providing best possible realtime response for a Linux user level program are presented. This includes the basic features of the chosen two kernel approach as well as the functional enhancements necessary for meeting the specific requirements of drive control applications. At the end the achieved performance data are presented.
