Harmony Actions

I assume if I knew how ,I could create activities that emulate using the Harmony Remote and send commands to the Hub. For example I currently have an IFTTT action that switches on the Radio at 0830. I dislike any solution requiring external access to my home automation so would like to use the Harmony component.

Currently there is no example of how to do this in the Harmony component nor a list of what action are possible. IFTTT won’t set the volume for example but could I do that?