Sony ERS-110 - Manual (Page 61)

60
Naps and bedtime
AIBO takes a nap for 5 to 30 minutes when not communicating
with anyone or when tired of playing. It can be woken up by a
gentle shake. Please be aware that AIBO can be offended by the
interruption to its nap and may wake up in a sour mood.
When not playing with AIBO for some time, you can set it to the
sleep mode with commands (see page 40).
A psychological peek into your
robot