Unlock S7-300 Plc Password =link=
: A laptop with an MMC reader or a Siemens Field PG.
: If you can provide proof of ownership and the hardware serial number, Siemens Technical Support may be able to provide an unlock file in specific circumstances. 3. Protection Levels unlock s7-300 plc password
Before attempting to unlock a PLC, you need to understand what you are up against. Siemens utilizes "Know-How Protection" and "Access Protection" levels: Full access to read and write. : A laptop with an MMC reader or a Siemens Field PG
If you do not need the current program and simply want to reuse the PLC, you can clear the password by performing a memory reset (MRES). Switch Method Turn the mode switch to Hold the switch in the Protection Levels Before attempting to unlock a PLC,
If the program logic is not needed, you can simply clear the protection by resetting the hardware.