I read the manual before I purchased the WS-1510ELPM. The write up on P mode caught my eye with I and D set to zero so whatever value P is the controller is 100% power. They use 7 as an example so seven degrees below set point is 7/7=1 or 100% power. So six degrees below set point is 6/7= flashes for 85% power. Five degrees below set point is 5/7= flashes for 71% power and so on till you get to set point at 0% power (off.) So if P is 1, one degree below set point is 100% power, one half degree below set point flashes 50% power, then off at set point. Even though the resolution is in 1* display it'll flash at one half degree below set point which is great for 275* smokes for fastest response with air current going through the smoker at higher temps to keep within two degress of set point. P=2 is two degrees below set point is 100% power, one degree below SP flashes for 50% power,then off at set point. P=3 is three degrees below set point is 3/3 =1 or 100% power, two degrees below set point = 2/3 or flashes for 66% power, then one degree below set point = 1/3 or flashes 33% power, then off at set point. So in P mode I and D=0, P=1 has the the highest output at 50% one half degree below set point. In the winter, windy conditions etc. P=1 is great. In the summer P=2 or 3 would work but so far I have no need to leave P=1 since I smoke brisket, ribs and butts at 275* and it's difficult to overshoot at higher temps with the high draft directly related to the temp. If you smoke low at 225* P=2 or 3 is less over shoot preheating but once meat mass is in the smoker there is no over shoot with P=1 (Mes 40.) and it holds within two degrees. With mailbox mod and vent wide open to burn pellets with max airflow P mode works best for me with my Mes Gen 1 40. If you have a smaller smoker and/or less air current the full PID mode maybe better. I went P mode after the out of the box settings and then auto tune was coming out of full power and the Auber started flashing many degrees below set point which is unacceptable to me to have to wait way too long to get to my set temp. It preheats to 275* in 20 minutes and gets back up to 275* in an hour with a decent amount of meat mass. The Auber 1210 looks to have the same default out of the box settings as the 1510 (P=7, I= 600 and D=150.) If you have an Mes 40, WS-1510ELPM and cook at 275* with the vent wide open and a mailbox mod this maybe a setting you should try. P=0 no matter the I and D settings is on/off Mode like the Mes stock controller so as long as P=1 or higher and I and D =0 then P mode is power % based on actual temp and it's proximity to set point with no input in regards to time in seconds with the I and D. (=no waiting, getup to temp ASAP.) So press and hold "set" till LOCK appears, enter 166, press set, P=1, press set, I=0, press set, D=0, press set, AT=0, press set, and t=2, press set. With sausage and fish P=2 or 3 starting at 150* and ramping up every hour is good low temp, no waiting, no over shoot. Write down your settings. You can always go back to those.
