Configure log rotation in Plesk

Configuration of Log rotation of Plesk system logs >> /etc/psa/logrotate.conf 

Configuration of Log rotation of Domain logs >> /usr/local/psa/etc/logrotate.d/

You can also configure in the front end :

Select domains>>select the option “open in control panel” for any particular domain.
Look for the option advanced options towards the end and select log rotation.