The report for , refers to a historic method for bypassing or retrieving forgotten passwords from Siemens SIMATIC S7 series PLCs, specifically focusing on the S7-300's MMC (Micro Memory Card) and the S7-200's internal memory.
It is still possible to recover or wipe these. Tools exist (often running in DOSBox or XP Virtual Machines) that can interface via PPI cables to clear the password. However, keep in mind the S7-200 is end-of-life. simatic s7 200 s7 300 mmc password unlock 2006 09 11
executable provided by Siemens to reset the PLC to factory defaults. This removes the password but also deletes the entire user program and configuration. Software Bypassing September 11, 2006 The report for , refers
For the S7-200, passwords are often stored in internal EEPROM. If you don't need the current program, you can wipe the CPU: However, keep in mind the S7-200 is end-of-life