Nope, Feed Rate depends on the demand for heat and the settings. I believe the MIN/MAX are a percent. if you are running at MAX FR99, and you don't have a full grate of coal, (about 1" of ash), then you have to raise the max a couple points. You don't want hot coals falling off the grate, that is too high MAX setting.
It also depends on your location of your thermostat, how far away from the heat source is it? The farther away, the longer it will take to satisfy the setpoint. Also, don't change the temp by too many degrees, 2-3 at the most, otherwise, it runs better if set at a certain temp and leave it there. Otherwise, you can have larger temp swings when it really starts cranking.
COAL takes time to react, it may take an hour or more to come up to temp, if the coal trol can't satisfy the temp within a certain period of time, it will keep increasing the Feed Rate to satisfy the temp, it will continue to raise the FR until the temp is attained. It's not like gas furnance, that is almost instant. Therefore, you have a full grate of coals burning, then the thremostat is satisfied, therefore, it overshoots the temp, dropping the feed rate to stop feeding...then cools down, and starts the cycle all over again, this can take a couple hours for it to finally settle down....
You sometimes have to "Dial IN" your settings, once you figure out how it works and how much your house heats up and cools down.
I think mine is at 8 and 46. Every stove is a little different, they give you the starting point settings that get it close.