Navigate to or check the physical CPU casing/display for the Article Number (e.g., 6ES7511-1AK02-0AB0 ).
Never turn off or reboot the PLC while the firmware update is actively processing. Consider connecting the PLC to an Uninterruptible Power Supply (UPS).
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
Before downloading any files, you must identify your hardware exactly: Go online with your PLC via .
Siemens publishes all official PLC firmware files directly to their secure ecosystem. Navigate to or check the physical CPU casing/display
Once you have downloaded the correct .upd files to your computer, choose one of the three following methods to apply the update to the PLC. Method A: Updating via TIA Portal (Most Common)
Do not interrupt power while the LEDs blink and the process completes. to your account
When finished, power down, remove the card (or delete the firmware files if using it as a program card), and restart the CPU. Method C: Updating via the CPU Web Server
