How can I make a safe communication between S7-1500F and S7-400 F/FH via PROFINET?

As I know S7-1500F  does not support safe communication over S7 connection. This means that safe communication with a F/FH plc is impossible.

Alternative could be the use of a PN/PN coupler...
Another way maybe is configure the S7-1500 as an I-Device controlled bu the F/FH cpu (but I am not sure this is possible)

Could someone confirm this? Any Idea?

Best Regards

Beavis

Answering by myself :-)

I got in touch with Siemens support and they confirmed what is  stated in manual A5E02714440:

IT IS NOT POSSIBLE TO MAKE A SAFE COMMUNICATION BETWEEN S7-1500 CPUs AND A S7-400F/FH (redundant) SYSTEM.
Communication is possible only between S7-1500 and S7-400F  (or S7-300F) CPU.

Best Regards

Hi,

And now is it possible ? with new firmware or others ?

Thanks