Submit a support ticket via Siemens Industry Online Support → “Hardware Password Recovery.” Turnaround: 4–6 weeks. Cost: ~€1,500.
: Confirm the selection. The CPU will wipe its internal work memory. 💻 Method 2: Reset via TIA Portal (Online & Diagnostics)
Select the option to Reset to factory settings . siemens s71500 password reset top
If you have access to the PLC in TIA Portal, but lack the specific password for the protection level, you can perform a factory reset from the online diagnostics.
⚠️ Doing so permanently destroys its internal boot sector, rendering the expensive card completely unusable. Step-by-Step Recovery Procedure Power down the S7-1500 CPU completely. Submit a support ticket via Siemens Industry Online
The approach depends on your urgency and data needs:
With these official methods and best practices, you can effectively manage forgotten passwords and maintain robust security for your S7-1500 PLC. The CPU will wipe its internal work memory
Unlocking a PLC when you do not have the original project file, or when the TIA Portal software is unable to communicate with the CPU.