Canon MF8580Cdw User Manual page 490

the setting menu is displayed. We recommend using the factory default settings to save the most power.
MF8580Cdw / MF8550Cdn / MF8540Cdn
10 to 60 (min.)
MF8280Cw / MF8230Cn
20 to 60 (min.)
Auto Offline Time
If a key has not been pressed for a specified period of time after the screen below is displayed (the machine is set online for scanning),
the machine automatically becomes offline. Specify the time period at which the machine becomes offline. You can also set the machine
to remain online.
0 (The machine remains online.)
1 to 5 to 60 (min.)
<Timer Settings>
*3
Auto Shutdown Time
Set a timer to automatically shut down the machine after the specified period of idle time has elapsed since the machine entered the
sleep mode. Setting Auto Shutdown Time (MF8540Cdn / MF8230Cn Only)
0 (Auto Shutdown is disabled.)
1 to 4 to 8 (hr.)
<Auto Offline Time>
Entering Sleep Mode
Set the time period <Apply>