gardtec 370 instant alarm! help?

i have a gardtec 370 and i recently pressed something in the menu by accident. Now the alarm triggers instantly on entering the property, before i used to get a 10 second warning alarm before the main alarm activated. How do i get the alarm back to this mode as its annoying going off instantly! and the neighbours aren't happy. any help appreciated, ps i have the manual and still can't figure it out.