Datalog to flash card in Compactlogix PLC???

I am doing a simple application where I need to scale my analogue input, and then datalog it to a compact flash card that is in the cpu of the compactlogix. Does anyone have a clue on how to do that? what instruction block to use? Using Omron I can use a FWRITE block which will write directly to the memory card....is there a way of doing that with AB??

As far as I know, the compactlogix compact flash card is only used to back up the entire project and can't be used as additional user memory.

thanks. I am wondering that myself. I have been pushed to cross a CJ1 (OMRON) to compactlogix...and I am seeing allot of things the ab can't do that the low cost Omron can.