You can set Power Save mode from the Web page of the printer.
Set the length of idle time before entering Power Save mode.
About the IP address of the printer
Setting the IP address
How to log in as the administrator
About the Web Page of the Printer
Available transition time settings
1 minute*,2 minutes,3 minutes,4 minutes,5 minutes,10 minutes,15 minutes,30 minutes,60 minutes
* indicates the factory default setting.