If your company maintains a Siemens Software Update Service contract, you can download the latest versions directly through the SUS portal or DVD delivery.
: Available for download here (21-day trial). s7 distributed safety programming v5.6 download
Siemens does offer S7 Distributed Safety as a public, free download. It is a licensed commercial product. However, typical sources include: If your company maintains a Siemens Software Update
: The Siemens Industry Online Support (SIOS) portal is the primary location for downloads. s7 distributed safety programming v5.6 download
A trial version is available on the Siemens Industry Online Support (SIOS) Portal .