Kristian Raue shows how easy it is to set up an OPC UA demo lab using Eclipse Streamsheets and FactoryI/O. You can also test OPC UA and do some modifications in real-time using these tools. FactoryI/O is a factory simulation program that allows you to build machinery that can be controlled by OPC UA.
https://www.youtube.com/watch?v=n7OVT5FW3QI
Build an OPC UA Demo Lab with FactoryIO and Eclipse Streamsheets