Instance data block

Hi,
is ist possible to programm symbolic an instance DB. I mean if I open data block as an instance DB AUF DI10, and then I want to read a state of a bit 4.0 in this DB, I do: U DIX4.0. But what if I want to have not DIX4.0 but the name of this bit, just exactly as if I read it's status with U DB10.DBX4.0?

If I understand your question.

Make sure the instance data block has a name in the symbol table.
If you change the bit name (for example), this must be done inside the function block. It cannot be changed at the data block when its an instance DB.

No it's not. In order to display symbolic names for DB components Step7 needs full address, i.e. DB10.DBX4.0