Hi there and welcome!
I'm not a pellet smoker guy so I cant help you much with the question about the smoke setting and the temp of your
pit boss pellet smoker.
HOWEVER, I can help you when it comes to ribs and maybe give a few tidbits of advice that may help to avoid ruining any future ribs or meat.
Pellet grills work on feeding pellets into a flame, as you already know :)
So since YOU are not the one controlling the feeding u are at the mercy of what the smoker can/wants to do, but never fear u still have plenty of control.
With that said u still have a lot of tricks up your sleeve to ensure you get good ribs or smoked meat.
#1 - IMPORTANT - I would suggest you get a dual probe wireless thermometer (or more probes like 4-6) so you can measure the temperature of your smoke at rack level and the Internal Ttemperature (IT) of your meat. This is a very fundamental step for "up"-ing ones smoking meat bbq game since most dishes are cooked by temp vs time and dishes like ribs, pork butts, and briskets are cooked till tender vs temp or time lol.
#2 - Ribs happen to be a cut that actually doesn't care what temp it is smoked/cooked at so as long as you know your temps of the smoker and the meat you ensure your meat is never ruined and comes out to perfection regardless of what the smoker decides to do haha. So again see point #1.
Basically ribs are done when they are tender and usually they are tender at 195F-198F Internal Temp (IT). You can check for tenderness by stabbing them with a toothpick and if it goes in with little or no resistance then they are tender. If you want fall of the bone ribs then u want like NO resistance once u penetrate the bark. If u want pull off the bone then u want the slightest detectable resistance. SmokinAl did a really good post where he takes ribs to 195F IT and they are bite off the bone. I personally like a middle ground of 198F. I have gone all the way up to 201F where they are on the verge of fall of the bone but not quite there so that gives u some temp understanding on ribs and what u can achieve NO MATTER what the smoker temp is. After all people grill ribs at way higher heats than smokers are usually cooking ribs.
#3 - If you are worried about producing more smoke then lots of pellet smoker people turn to a pellet smoker tube that you fill with pellets and light for 10 min and blow out and it generates perfect smoke independently from your bit poss. This way YOU can better control the amount of smoke your meat gets while the
pit boss is doing it's thing for heat and smoke! The
A-Maze-N Pellet Smoker tube is a good one that people use. The extended oval shaped one would be the one i would look at.
#4 - Never smoke food based on time (well rarely ever go based on time). Internal Temp will tell you when something is done or in the case of stuff like briskets and pork butts it will tell you when to check for tenderness. So see point #1 for the thermometor
Feel free to ask questions about anything I've posted here and know we have an amazing community so ask all the questions at any time and I'm sure we can get you fixed up and avoiding future bad rib smokes. I'm sure soon u will be telling us all how to do it better :)