S7-1200 Password Unlock ((exclusive)) May 2026

Forgetting a password on a Siemens SIMATIC S7-1200 PLC Go to product viewer dialog for this item.

However, one common nightmare scenario haunts automation professionals: lost or forgotten passwords. S7-1200 Password Unlock

Power the PLC back on. The CPU is now reset to factory defaults with no password protection.  Recovery via Firmware Update (Alternative)  Forgetting a password on a Siemens SIMATIC S7-1200

Risks:

Best Practice 3 – Regularly Backup Projects to a Central Server

If you have the TIA Portal project, you have the password (encrypted but you can overwrite it). Set up automated backups of .ap* files. Reverse engineering a competitor's product

1. Reverse engineering a competitor's product.
2. Attempting to bypass safety interlocks.
3. Stealing trade secrets.

1. Power off the S7-1200.
2. Remove the memory card (if one is inserted).
3. Power on the CPU. The STOP LED will flash.
4. Use TIA Portal or STEP 7 Basic to access the "Online & Diagnostics" view.
5. Go to Functions > Reset to Factory Settings.