Convention for set points in models

[Hofsmo]

Hi,
I started developing a very simple model for the library and looked into other models to get a feel on what you want the models to look like. While doing this I discovered that some models model set points as constant sources and other models them as input ports. Do you have any preferred way of doing this?

In my model I think I will use an input port since I want to model the set point of a governor that may be potentially be changed by the LFC.

Sigurd