This is a demonstration to give an example on how to use Linux with the current support for Time Sensitive Networking (TSN) as an industrial endpoint. For this purpose the components of this demonstration form a converged network use case in an industrial setting.
The Use Case Demonstration is aimed at the AccessTSN Endpoint Image and is tested with but should also work independently from the image.
This work is a result of the AccessTSN-Project. More information on the project as well as contact information are on the project's webpage: https://accesstsn.com
The AccessTSN Industrial Use Case Demo consists of multiple Git-projects, each holding the code to one component of the demonstration. This repository contains an OPC UA-Server to get access to the values from shared memory (read only for now). It also contains a demo for UaExpert to visualize the data. The OPC UA is based on the open62541-Project.
The main repository for AccessTSN Industrial Use Case Demo can be found on Github: https://github.com/iswunistuttgart/AccessTSN_Industrial_Use_Case_Demo
Get the repository and all submodules with:
git clone --recurse-submodules <INSERT_REPO>
Install open62541 framework according to open62541 documentation. Do not install the framework into the this git project or you might encounter errors when you try running the server.
Please checkout and install version 1.2.1 either through a checkout of the corresponding tag or through specifying the version on the cmake option -DOPEN62541_VERSION=v1.2.1. Also when building the open62541 framework activate the multithreading support with the cmake option -DUA_MULTITHREADING=100.
Switch to directory _/nc_machine/example_
copy file __/src_generated/Opc.Ua.CNC.NodeSet.bsd to /usr/local/share/open62541/tools/ua-nodeset/CNC/_
Run command cmake -B build
Switch to directory /build
Run command make
The installation steps described above have been put into a automated script build_install.sh. It automates the process of cloning, building and installing the open62541 framework, as well as building the OPC UA Server of the AccessTSN Industrial Use Case Demo implemented in this repository. It can also be used if the open62541 framework has already been build ans installed. Be aware that the script currently does not check if the installed version of open62541 was build with the necessary configuration.
The script can be run in interactive or automated mode. Without commandline options the script runs in interactive mode asking if the open62541 framework should be installed. To run in automated mode use either "o" or "n" as commandline option (exclusive). The first option "o" specifies to clone, build and install the open62541 framework. The "n" specifies that the framework is already installed, in this case the script will look for the framework in the standard location /usr/local/share/open62541. If not found there the script will ask for the correct location regardless of the mode.
After the script completes successfully the OPC UA Server (Access_TSN_Demo) can be found in the following subdirectory of this repository nc_machine/example/build/.
Start the server using sudo: sudo Access_TSN_Demo
Connect a viewer like UaExpert and check the values.
An example file for UaExpert with working variables can be found in the root of this project named AccessTSNDemoServer.uap
UaExpert can be obtained here
If you have no application writing into the shared memory defined in mk_shminterface you can build and start the application demowriter in directory accesstsn_demoapps_common/demo
Version v0.52 is tested with
Debian GNU/Linux 10 (buster) preempt-rt
open62541 @ 4038a31 (tag v1.2.1 )
accesstsn_demoapps_common @ a3a45fdf
UaExpert-1.5.1-331-x86_64.AppImage
The initial released version is tested with
Debian GNU/Linux 10 (buster)
open62541 @ f85adb7b
accesstsn_demoapps_common @ 42cc7fff
UaExpert-1.5.1-331-x86_64.AppImage