In your company’s engineering standard, mandate that every CPU's "Reset password" sticker is photographed and stored in a secure SharePoint or project document. This is your physical failsafe.
Siemens protects its PLCs seriously. There’s no “backdoor” password. If you have the original project file, you’re fine. If not, you can’t extract the original password — but you can reset the CPU and load a new program. siemens s7-1500 password reset
For official technical steps and software tools, you can visit the Siemens Industry Online Support (SIOS) portal Do you need help re-establishing communication with the PLC after a factory reset? In your company’s engineering standard, mandate that every