syntax is
sja “jobfile.xml” –l”log.txt” –s”session.xml”
Refer to:
http://webyog.com/faq/27_114_en.html
'user' and 'password' are inside the jobfile for each connection.
schedule is not a parameter. You schedule using SQLyog ENTERPRISE GUI (on Windows), directly from the Windows Scheduler or (on Linux) as you would schedule any job from some CRONTAB interface.