Hands-On / Example Application for OPC UA Support

This is an example application that shows how to build an IOC that connects to an OPC UA server.

The only intention is to get you started. The examples are not necessarily intended as a template for a real world application. They don't cover all features, and they are not the one and only way to do things.

Building the Module

Run make at the top level of the module.

Preparing the IOC

Edit the example IOC startup script (iocBoot/iocopcuaEx/st.cmd):

• Change the call to opcuaCreateSession to match your OPC UA server URL.

• Uncomment the dbLoadRecords commands loading the example databases for your server, adapting their macro settings if necessary.

Running the IOC

Run the IOC, loading the startup script.

Look at the database files to see which records are available.

Contents of the Example Module

TemplateDbSup

Template databases used by the device example databases.

AnyServerDb contains templates for namespace 0 (server namespace) that should be implemented by any OPC UA server.

DeviceDbApp

Example databases for different OPC UA servers.

Please refer to the README files inside the device directories for details.

The directory .Db is not being built, but intended as a template when creating example databases for a new OPC UA device.

OPC UA Device Support Documentation

The documentation folder of the Device Support module contains the Requirements Specification (SRS) giving an introduction and the list of requirements that should convey a good idea of the planned features.

The Cheat Sheet explains the configuration in the startup script and the database links.

Feedback / Reporting issues

Please use the OPC UA Device Support Module's GitHub issue tracker.

Contributing

Contributions are welcome, preferably in the form of GitHub pull requests.

An example for a new OPC UA device should contain:

• a DeviceDbApp sub-directory that creates all necessary EPICS databases

• a README.md file describing how to prepare the device to work with the example application

• a snippet for the startup script that loads the example databases.

License

This example application is part of the OPC UA Device Support module that is distributed subject to a Software License Agreement found in file LICENSE that is included with its distribution.