Your path forward is clean installation on legacy hardware (if available) or immediate emergency migration.
Begin budgeting for a migration now. Every month you delay increases the risk of a cyber incident or hardware failure that cannot be repaired (S7-400 spare parts are becoming scarce in 2026). Simatic PCS7 v7.1 SP1
Siemens provides extended support for legacy PCS7 versions via the "Industrial Legacy Support" contract. Contact your local Siemens representative for quotes on v7.1 SP1 critical patches, but expect high costs. Product names like Simatic, PCS7, WinCC, and STEP 7 are registered trademarks of Siemens AG. This article is for informational purposes based on public technical documentation and industry experience. Always verify hardware compatibility with Siemens Industry Online Support (SIOS). Your path forward is clean installation on legacy