Unlock: S7-200 Smart Password

: If prompted for a password to perform the clear, enter the master override:

: Turn off the PLC, insert the card, and turn the PLC back on. s7-200 smart password unlock

If you cannot connect via software because the IP address or communication settings are also locked, you can use a memory card to force a reset. : Use a standard Micro SD card (formatted). : Create a text file on the card named S7_JOB.S7S : Inside the file, type only the text: Reset to factory defaults : If prompted for a password to perform

To unlock or bypass a password on a Siemens S7-200 SMART PLC you typically have to choose between a Factory Reset (which deletes all existing program data) or using the Master Password to wipe the memory for a fresh download 1. The "Master Password" Method (Memory Clear) : Create a text file on the card named S7_JOB