: Turn the power off and remove the card. The PLC is now "blank" and accessible. 3. Check for Default Passwords
This process deletes the existing program and configuration from the CPU. It is irreversible. S7-1200 Password Unlock
Siemens TIA Portal enforces structured access control for the S7-1200 CPU firmware (typically from v4.0 and higher). Understanding these levels helps clarify what a password restricts. : Turn the power off and remove the card