Hello Opps;

You should find the information you need in the following Industry Mall page (Siemens electronic catalog):

https://mall.industry.siemens.com/mall/en/WW/Catalog/Products/5000906

Open the Product Information tab to have a list of all integrated softwares of this Professional Combo license.

The basic requirement (software) to program a S7-400H system is Step 7 v5.x, so the integrated Step 7 v5.6 in the Combo license is adequate. Hardware of course implies S7-400H CPUs, , with hot stand-by features.

Hope this helps,

Daniel Chartier