Power the CPU back on. It is now factory reset and unprotected.
into your PC. In TIA Portal, open the card reader view and or ensure it is empty. s71200 password unlock work
Unlocking a password-protected Siemens SIMATIC S7-1200 PLC when the password is lost generally involves a factory reset Power the CPU back on
: Insert the transfer card into the CPU slot and power it back on. In TIA Portal, open the card reader view
If you have some level of access or the protection level allows for "Online & Diagnostics" without a password, you can reset it directly through the software.
If the CPU was configured with "Protection of confidential PLC configuration data," you must also select the Delete password checkbox during a standard factory reset via TIA Portal (if you still have online access).