If Siemens refuses (e.g., you bought the machine used with no paperwork), only then consider services like:
: Note that older Siemens hardware (like the S7-200) used CLEARPLC as a password to wipe memory, but this does not apply to the S7-1200. 4. Recovering Protected Blocks (Know-How Protection) S7-1200 Password Unlock
If the PLC protection level is set to "Read Access" or "HMI Access" (rather than "No Access"), you might still be able to communicate with the device online to perform a reset without a physical memory card. Connect your PC to the S7-1200 via an Ethernet cable. Open TIA Portal and navigate to the . If Siemens refuses (e
Insert the prepared "Transfer" card into the PLC's memory card slot. Watch the LEDs: Wait until the (Maintenance) LED starts blinking and the LED is solid. the CPU again and the memory card. Verification Connect your PC to the S7-1200 via an Ethernet cable