format the MMC when Windows asks you to; doing so will permanently destroy the Siemens file system and render the card useless for the PLC. Prevention: The Best Cure To avoid this drama in the future: Keep Backups
Unlocking a PLC without authorization may violate: unlock password plc siemens s7 300 rarl better
Turn the switch to MRES and hold it there for about 9 seconds until the STOP LED stays constantly lit. format the MMC when Windows asks you to;
This scenario assumes you have a locked CPU whose program you do not need to preserve. The goal is simply to wipe the CPU clean so it can be used for a new project. Here, the official method is straightforward: . This will delete both the user program and the password that protects it. The standard procedure is performing a Memory Reset (MRES) on the CPU using its physical mode switch. Procedure to perform a MRES: The goal is simply to wipe the CPU
The keyword mentions “rarl better” – likely a misspelling of , meaning: Is it better to recover the password from a RAR file?