Beep sound

This morning was -2 here,when i turned the ignition key there was the usual beep for the glow plugs to heat up! then when the light went out(only a couple of seconds!) I left it another couple of seconds and turned the key.
It Then beeped the whole time the car turned over until she kicked in,started no probs like!,first time this has happened,is this normal,or is the she trying to tell me something??? 8O