Insert the empty, formatted memory card into the S7-1500.
Here is the technical reality of the S7-1500 protection mechanism and your limited options for recovery. siemens s7-1500 password reset
The PLC will clear its internal memory and restart. You can now assign a new IP address and download a fresh project without any legacy password restrictions. Method 3: Reset Using the CPU Display Insert the empty, formatted memory card into the S7-1500
Turn the PLC power back on. The CPU will boot up with factory default settings. Method 4: Overwriting with a Clear SMC You can now assign a new IP address
Is the password lock on the , or on a specific block inside TIA Portal?
After the reset, the PLC will behave like it is brand new, with no IP address and an empty user memory. You will need the original TIA Portal project file to reload the program.
Do not use third-party password crackers for the S7-1500. The physical "Reset password" sticker on the CPU exists for precisely this scenario. If that sticker is worn off or missing, call Siemens support directly. They have a formal process involving proof of ownership.