Siemens -Profibus DP master/slave data exchange

two CPU under Profibus DP Master/Slave communication. do they exchange DB data?

eg CPU1 DB1 -> CPU2 DB10
CPU1 DB2<- CPU2 DB11

is it possiable? if so How I fill the address in DP-Slave Configuration Row?

Between master and slave is normally exchanged only i/o data.
Input words in the master are output words in the slave and vice-versa.

However, there is a method to use the cyclically exchanged i/o data to exchange a variable amount of data on event:
http://support.automation.siemens.com/WW/view/en/20987910
Between S7-300 stations max 100 bytes can be exchanged, of these max 8 bytes consistently.

thank you