SIMATIC STEP 7 V5.4 (released in 2006) has been discontinued since 2010 and is no longer available through standard commercial channels. Siemens SiePortal Trial Version
to inquire about remaining legacy stock or specific licensing needs for older hardware. Technical Specifications for V5.4 Simatic Manager Step 7 V5 4 Free Download
. While Siemens provides trial versions and free service pack updates, a full functional installation requires a paid license. Siemens SiePortal Official Procurement & Availability SIMATIC STEP 7 V5