S1200 CM1242-5 profibus slave module +GE Func Master plc

Hi all!
I’m working with Siemens S1200 PLC (CPU1214 C DC/DC/DC) and trying to setup a Muster –Slave PROFIBUS communication between Siemens S7-1200 PLC and GE PLC (GE Func). In my project I have a S7-1200 - PROFIBUS CM 1242-5 module as a DP Slave. I defined I/O transfer areas for this module and use DPRD_DAT and DPWR_DAT SFCs to send and receive data to a Master GE PLC.If I understood correctly this way i can transfer my Data Blocks.The problem is that i must also add to my hardware configuration a DP Master for my Slave CM 1242-5 module.I tried to import a GE Func PROFIBUS Master module GSD file(model IC693PBM200)into my project , but the error appears that it's not a GSD Slave file.Seems like I can import here only slave GSDs.
How can i overcome this problem?
Is there any program examples or tips for such a type of configurations?
Thanks in advance!

The easy way would be to exchange the IC693PBM200 for an IC693PBS201 or add the Slave module to the 90-30 PLC. Get GFK-2121 for how/if the PBM200 can act as a 'Slave'.