S7 TDD (FC84) function question

Hi all,
I need your help with the TDD (FC84) function. I tried it and every thing is OK, But there is a problem with the data input.

I have to insert DW values into the data input function, e.g to insert DB13.DBW88 to DB12.DBW12 but the TDD function doesn't accept the DBx.DBWy format.

How I can solve the problem.

Regards...

Here's one I made earlier:



You have to be very specific about your problem. For example, how is DB13.DBW88 defined ? FC84 expects a word variable.
FC84 is called ATT - are we talking the same function here ?