Siemens distributes software, updates, and trial versions primarily through its official online infrastructure. 1. Siemens Industry Online Support (SIOS) Portal
You must have STEP 7 V5.6 (or STEP 7 Professional 2017) already installed and licensed on your PC. Distributed Safety V5.6 will not install as a standalone product.
Siemens hosts its software packages, updates, and Service Packs directly on the Siemens Industry Online Support portal.
