Siemens S7 200 Smart Password Unlock Work [ Easy | Version ]

Siemens S7-200 SMART Password Recovery: Procedures and Implications

keep the existing program

If you need to (e.g., a machine with no source code), official Siemens tools will not recover the password. Some specialized hardware/software tools claim to unlock the S7-200 SMART via the programming port (Ethernet or RS485). Use at your own risk.

You may need to power cycle the PLC within 60 seconds of the clear command to complete the reset. Method B: Micro SD Card (Resetting without Software) siemens s7 200 smart password unlock work

If you need to keep the program but don't have the password, there are unofficial tools and services: Unlock Software: a machine with no source code)