You can check your current firmware version via the CPU’s display panel or by going to in TIA Portal.
Siemens provides firmware updates free of charge for registered users. You do not need to pay extra for the firmware file itself; you simply need an account on the Siemens Industry Online Support portal. This guarantees the file is authentic, checksum-verified, and safe. s7-1200 firmware 4.6 download
Before you begin the , you must ensure your hardware supports it. Firmware is not universal across all S7-1200 models. You can check your current firmware version via