After successfully unlocking the S7-300 PLC password:
Hold the mode selector switch in the position and turn the power back on.
If you are a legitimate owner or authorized maintenance provider and have lost the password, here are the proper channels to pursue:
Hold the switch in the position for roughly 9 seconds until the STOP LED stops flashing and remains solid.
If you must recover the original logic but cannot bypass the prompt, you can attempt to read the password directly from the . The password for an S7-300 is stored on the MMC card itself, rather than solely in the CPU's volatile memory.
The STOP LED should flash quickly, indicating the memory is being cleared. Once it stays lit, the reset is complete. Siemens SiePortal 3. Reset via STEP 7 / TIA Portal
Unlock S7300 Plc Password
After successfully unlocking the S7-300 PLC password:
If you must recover the original logic but cannot bypass the prompt, you can attempt to read the password directly from the . The password for an S7-300 is stored on the MMC card itself, rather than solely in the CPU's volatile memory.
The STOP LED should flash quickly, indicating the memory is being cleared. Once it stays lit, the reset is complete. Siemens SiePortal 3. Reset via STEP 7 / TIA Portal