Sony ERS-111 - Manual (Page 61)

60
Naps and bedtime
AIBO sometimes takes a nap for 5 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