If you already have the PLC and software, isn't there a manual to learn from?
Have you contacted Omron or their local distributor for whom you purchased from, for support.
I would suggest firing up the software and seeing what it can do. Sometimes you can learn from just playing around with the software, to see what it can do.
I would also think that there should be some form of online help through the software.
You may also want to check out Omron's web site to see what documentation they offer.
Hope this helps.
God Bless,