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
2017-09-12 12:00
OSADL project to create Open Source license checklists
Facilitate Open Source software delivery |
HOT - Heidelberg OSADL Talks 2024 (online event)
OSADL Networking Day 2024 in Heidelberg, Germany
Real Time Linux Workshops
1999 - 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009 - 2010
Eighth Real-Time Linux Workshop on October 12 to 15, 2006, in Lanzhou, Gansu, P.R.China
Safe and Cooperative Coexistence of a SoftPLC and Linux
Robert Kaiser, Stephan Wagner and Alexander ZuepkeSYSGO AG
Am Pfaffenstein 14, D-55270 Klein-Winternheim, Germany
robªsysgo.com
swaªsysgo.com
azuªsysgo.com
Combining Linux and a softPLC in a single system stands to reason: Linux offers many facilities that modern PLCs are expected to support. However, existing Linux-based softPLC implementations so far have always placed the PLC ''on top'' of the Linux kernel, so its functional reliability depends on the correctness of the kernel. Due to its size, the Linux kernel can not be exhaustively validated or even proven correct. This has hampered applicability of the concept to safety-critical PLC systems. The approach described in this paper puts Linux and a softPLC ''side by side'' on top of a small microkernel, thus the two subsystems can coexist safely without being forced to depend on each other. In this way, the trusted code base of the PLC is reduced by several orders of magnitude, thereby enabling its certification according to applicable standards for safety-critical systems.
