Power on the CPU. It is now factory reset with no password protection, allowing you to download a new project.
Siemens uses three primary layers of protection. Knowing which one you are facing determines your recovery path: S7-1200 Password Unlock
Open the older versions of the project. Security configurations are often added late in commissioning cycles. An early-stage backup might contain the identical logic without the password restrictions applied. 2. Password Retrieval Tools (Memory Card Analysis) Power on the CPU