Because V13 is legacy, Siemens uses slower archive servers. Try downloading during off-hours (early morning UTC). Alternatively, contact Siemens support – they may provide a direct FTP link.
Because V13 is older, Siemens sometimes hides it under "Archived Versions." Use the filter on the left: Product Family = "SIMATIC STEP 7," Version = "V13." Siemens Tia Portal V13 Trial Download
For further help, visit the Siemens Industry Forum or r/PLC on Reddit, where engineers share legacy software experiences daily. Because V13 is legacy, Siemens uses slower archive servers
