Profibus dp

Hello guys!

I want to configure PROFIBUS between a Siemens Multipanel (MP270B) and an S7300 (CPU314C-2DP). I jus want to know how to configure both devices as masters (multimasters mode), i have worked with master-slave configuration using ET devices but know i want to know how does multimaster mode has to be configured...
Any advice or suggestion will be appreciated...so much

Put 314C-2DP and MP270B in the same STEP7 project.
In the HW Config for both 314C-2DP and MP270B, connect them to the same Profibus net as masters.

In the MP270B project, specify the connection partner by selecting the 314C-2DP in the connection dialog. Do not specify parameters such as the partner DP address, rack or slot manually.

And that's it. You are finished.

Ah, double post I see.
Should be against the law.

Well thanks Jesper for your reply... I still have problems with this project. I found that my cable was not the problem, i´m using another profibus cable by one of our providers and i still don´t have communication between the MP270B and the S7-300 . I think something left in my WinCC or maybe my Simatic project configuration.I´m configuring the topology of the Net Using NetPro.
In NetPro i have the Multi point interface MPI to connect the S7-300 to my PC. And I have Profibus network linking S7-300 (using DP port it´s a CPU314C-2DP) and the MP270B by its MPI/DP port (i´m putting the dip switches all in off, to set it in DP).
Adresses in the profibus network are 3 for MP270B and 2 for S7300, i pretend to use both devices as masters.
The network speed that i´m using first is 187,5 kbits/s and its configuration is DP. Is this the correct configuration according to what i want to do or do i need to use another like Universal DP/FMS or Standard?
After that, when i open the HMI Connections on Simatic manager automatically WinCC flexible advanced opens and there i can see in connections list the connection that i have configured in netpro.
And well, here is my doubt. In this case do i need to insert a new linkage in the WinCC flexible RT in the netpro configuration. Or its only like in the way that i am doing it?