If you need to recover a specific project, please let me know: What is running on your S7-1200? Do you have the original TIA Portal project backup file ?

Do you need to , or is wiping the PLC acceptable?

If you find yourself locked out of an S7-1200, forget the "hacker" forums. The engineering path is safer and more effective.

Case studies and anecdotal reports (summarized)

When a completely blank card fails to trigger an automatic wipe on certain firmwares. Siemens SMC, official firmware .upd file. No (Wipes CPU)

Access protection is set within Siemens TIA Portal. If you lose this password, the hardware can only be recovered by wiping it clean. Method 1: The SIMATIC Memory Card Reset (Recommended)

Insert the card into a PC and delete all existing files (do not format the card using Windows tools).

If you cannot go online because the password restricts connection entirely, you can use a blank SIMATIC memory card to reset the PLC. Turn off the power to the Go to product viewer dialog for this item.

Regaining access to a locked S7-1200 can be challenging, but it is not impossible. , erasing the password and the program. While this requires a new program download, it ensures total access to the hardware.