Maximum time for rising in a breadmaker
Take a peek of the dough every 1/2 hour.

If you see in a certain peek it's lower than the last time you saw it, it has fully risen and is starting to fall.

The dough should be about to reach it's rising limit before it begins to be baked, but not pass it. You can change the dough's rising speed changing the amount of yeast from your recipe, or controlling the dough's temperature, among other ways.