It might pay for you to post your program here, so then we can see what you are doing. There are a few Omron people that visit here, not as many as AB / siemens by my reckoning though.
There are setup words that need to be configured to suit your requirements, these are all documented in the manual.
Start by posting your code, and possibly explaining how much understanding of Omron you have, this will help to explain how to set it up, and also give others some tips.