Ademco 5110XM Codes

Master Code (Master only changed by downloading)
Secondary Codes User 2 to 6
Duress Code None

You cannot pause more than 2 seconds while entering below commands or it won’t work
Add Codes Master Code + 8 + User (2 to 6) + New Code
Erase Codes Master Code + 8 + User (2 to 6) wait 5 seconds
After above commands keypad should beep indicating successful, if not try again