Subprotocol and parameters for sets of values

Hi,

I build a protocol which interfaces with some other subprotocol from mine. In the latter, for the parameters of the subprotocol, I would like to implement an option where the user can select different options (low, medium and high) and where each of this options corresponds to different sets of values for local variables on the subprotocol, for instance:

VARS: A, B, C
low 0, 0, 0
medium 1, 10, 20
high 10, 100, 500

how could I do this association?

Thanks