Looks like this will sort you out.
Does anyone know how to program different bell schedules? I can get to the part where you can view the different schedules that are available, but I see no way to edit them, and the manuals I've found online don't mention editing the bell schedules at all.
I've read that there is an accompanying software called WinPal, but I haven't been able to find it online except through this forum, but I am unable to private message the user who posted about it as my account is too new.
I would love some help if anyone has knowledge of this system.