SL1,SL2 are internal parameter to define mode of alarm. For BBQ use, please use default value.
HDC is maximum fan speed. In a small pit, you may define it as 50%, 60%,70%,80% ect.
SC is TARGETED pit temperature.
RC is keeping time under SC
AH high temperature alarm
AL Low temperature alarm
If you do not want alarm or neighbor friendly, you can simply set a big AH,AL.
If you want ONE temperature stage, simply set SC2=0, it will ignore following stages