Siemens publishes all official PLC firmware files directly to their secure ecosystem.
Access the official download repository via the Siemens Industry Online Support S7-1500 Firmware Page . s7-1500 firmware download
Insert a SIMATIC Memory Card into your computer's card reader. Siemens publishes all official PLC firmware files directly
to your account. Export-restricted downloads (typically files for firmware V2.8 and higher) require a registered and validated account. Search for the specific article number of your CPU. s7-1500 firmware download