Addressing %DBW to InOut S7 1500

Hi all

I wrote a small program (driver) he perfect work on S7 300. There is one part in it where the "InOut" area contains a one element "int" that receive and give numbers of DBW to different DB inside himself. When calling this driver, the number of address DB is putted there.

For example i want write there %DBW0. That means driver will use this DBW0 for transfer and receive data to some different DB's inside himself.

The S7 300 does this very well. Just put "%DBW0" or another number.

But the S7 1500 cannot allow this. See two photos - first one CPU300 second CPU 1500.

The questions is how solve this issue.

Thanks