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25 - 27 February 2020 // Nuremberg, Germany

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Exhibitors & Products embedded world 2019
Zoom product LOGO_Project: Real-time network (OPC UA over TSN)

Project: Real-time network (OPC UA over TSN)

LOGO_Project: Real-time network (OPC UA over TSN)

Project: Real-time network (OPC UA over TSN)

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The Ethernet standard and the future evolution of this base communication layer represents today an important standard of interoperable network communication - in fact from sensor via control system up to the server. According to common understanding, this will remain so without doubt in the near and even less near future. To the contrary, there are many doubts that the upper communication layers will remain as they are now, since the required interoperability makes it highly desirable that only a single protocol be used - instead of the more than 50 different ones none of which has reached more than 50 percent market share. In addition, communication methods are needed that have real-time capabilities and require much less resources than today which is an important prerequisite to serve the expected large number of future nodes. The above doubts were obviously more than justified; 21 well-known automation companies that together cover more than 95 percent of the market agreed on SPS IPC Drives 2018 to create a uniform real-time communication system based on OPC UA with Publish / Subscriber Extensions (PubSub) and Time Sensitive Network (TSN). And it was obvious to delegate the task and responsibility to the OPC Foundation to organize standardization and implementation of the new globally binding protocol.

In addition to the standardization of OPC UA/TSN, it is also necessary to provide freely accessible and fully usable software implementations in order to achieve a general acceptance of the methods. This can best be achieved by using an Open Source license that allows to be linked to proprietary applications. Since this was not the case, a first version of an Open Source implementation of OPC UA was launched without PubSub and TSN in the context of the project "open62541". Further development including the provision of PubSub, and initial tests with TSN then took place in an OSADL community project. The project partners involved a team at the Fraunhofer Institute for Optronics, Systems Engineering and Image Evaluation (Fraunhofer IOSB) and the India-based software integrator and consultant Kalycito Infotech. After completing this project phase, OPC UA with PubSub was available for the first time under an Open Source license suitable for industrial products. However, at least the following components were still missing:

1. Configuration of TSN endpoints

2. Generic interface to TSN

3. Improvement of the real-time capabilities

4. Support for the certification of individual devices

5. Extension by a security layer

In order to realize the development activity of these components as part of a community process, a new Letter of Intent for project phase 2 is now available. When the funding threshold mentioned in this Letter of Intent is reached, the project starts; it is hoped that this will be the case before the first day of embedded world 2019. This Letter of Intent is available to interested companies at the following download link:

https://osadl.org/OPCUA-PubSub-TSN-LoI2.

Software development and project management:

Fraunhofer IOSB
Kalycito Infotech
Open Source Automation Development Lab (OSADL)


Participants of the first OSADL project:

Heidelberger Druckmaschinen
Kontron
Linutronix
Pilz
SICK
TQ-Systems

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