There's nothing like "WinSCP server"
. If you mean the SFTP/FTP/whatever server that you connect to
with WinSCP, then you are on a wrong track here.
That's a question about your server's system. We do not know what that is. And it's not a WinSCP question anyway. If it is some common Linux system, then indeed, you use the "cron". If you have problems, please ask at a appropriate site, like https://superuser.com/