S7-1200 Password Unlock |top| Link

Insert an into the card slot. Do not use standard commercial SD cards; they will damage the slot structure and are not recognized by the system firmware. Power up the CPU.

However, Siemens actively releases firmware updates to patch these issues. For the vast majority of users without advanced electronic engineering skills and deep knowledge of the S7 protocol, these are not viable unlock methods.

If you've lost the password for your own equipment: S7-1200 Password Unlock

Anyone can read, write, modify, or delete the PLC program.

Power the CPU back on. The CPU will automatically copy the "empty" project, effectively erasing the internal load memory and removing the old password. Wait for the LED to blink, then power off and remove the card. Insert an into the card slot

Insert the card into a PG (Siemens Programming Device) or a compatible SD card reader.

Document which security levels are active on specific machines within the functional specifications of the facility. To help provide more specific guidance, tell me: What firmware version is your S7-1200 CPU running? However, Siemens actively releases firmware updates to patch

Store all industrial passwords in an enterprise-grade, encrypted password manager (like KeePass or Bitwarden) accessible by the maintenance team.