Passwords exist for safety, accountability, and continuity. In an industrial setting:
This binds the program to a specific CPU serial number. If you try to run the program on a different CPU, it will fail. S7-1200 Password Unlock
Choose whether to retain or delete the IP address, then click . Passwords exist for safety, accountability, and continuity
Expand the menu and select Reset to Factory Settings . Passwords exist for safety
Older Siemens PLCs (like the S7-300) stored passwords in plain text or weak hashes on the MMC, making password extraction highly feasible.
Follow this procedure carefully.