Hi,
If you’re a beginner and trying to learn the concepts of ros2_control, then this post may help you. I’ve tried to simplify the concept for the people who are just starting out with ros2_control. I hope this helps.
That’s a nice summary. It would be great to have some of this information reflected on the ros2_control documentation page. If you are willing to contribute, please open a PR on GitHub - ros-controls/control.ros.org or other related packages.