S7-200 Smart Plc Password Unlock [patched] -

: Use the WIPEOUT.exe utility, which may be found on the original installation CD or official Siemens Support site . This tool resets the CPU to its pristine delivery state, including baud rate (9.6 kbit/s) and network address (address 2).

If you have exhausted legal options and are willing to risk the hardware, here is the procedure used by field service technicians. s7-200 smart plc password unlock