Real time clock synchronization feature with DP/DP coupler

Hello,

I am using this post to make another question:

Regarding DP_V2, I need to connect a S7415 H platform to an ABB DCS system (AC87P on symphony + platform which supports DP_V2), and my costumer is requesting us the V2 functionality.

Checking SIEMENS S7400 H platform product I can't find any reference which support V2 functionalities.

Due to my application (one DCS master talking with H platform as slave adding a DP/Dp coupler) probably I only will need the real time clock synchronization feature, but I don't know if this feature will be abailable when crossing the needed DP/DP coupler.

Many thanks in advanced 

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Split from Profibus DP - V2.