If you set it at one minute I would imagine you are talking about delay between pictures. Shutter speed is usually measured in a 1/xxxx configuration. I set my delay at one minute, but I also have salt at my camera locations so I end up with 700 pictures over a 2 week period. If you don't have any bait set it to 30 seconds if it will allow. That way you can get multiple pictures of anything that is walking by.
Brandon