Wait for the LEDs to indicate the process is complete (often the LED will blink or turn steady). Power off the PLC, remove the card, and power it back on. 3. Alternative "Master" Passwords
To avoid future lockouts, organizations should implement the following: Centralized Backup:
, which deletes the existing program to protect intellectual property. You cannot recover the password itself through official Siemens methods. Siemens SiePortal 1. Clear Memory via STEP 7-Micro/WIN SMART
If you have forgotten the password to your S7-200 Smart PLC or need to access a PLC with a password-protected program, there are a few methods you can try to unlock it: