For newer firmware versions (V2.9+), you can specifically delete the "confidential PLC configuration data" password via the Online & Diagnostics menu if you have a new project ready to load. Important Considerations
If you have lost the password, the only legitimate, Siemens-supported method is to perform a (RTFS). This is not the same as an MRES (Memory Reset). siemens s7-1500 password reset
Restricts the ability to read or write to the CPU via TIA Portal or HMI. For newer firmware versions (V2
We’ve all been there — you inherit a machine, the original integrator is long gone, and the S7-1500 CPU is password-protected. Here’s what actually works. Restricts the ability to read or write to
Within 3 seconds, switch back to and then back to STOP . Password Reset via SMC Factory Reset (TIA) Reset via Display Data Loss Yes (Total) Yes (Total) Yes (Total) Requires PC Yes (Card Reader) Yes (TIA Portal) Hardware Access Online Access
This is the standard method for regaining access to a locked S7-1500 CPU.