Create a folder named SET_PWD.S7S in the root directory of the SMC.
If a password for an S7-1500 is lost, the original program cannot be recovered from the device. The only way to regain access is to and reset it to factory settings. This process requires physical access to the hardware and will delete all stored program data and configurations. Method 1: Reset via TIA Portal (Online Access Required) siemens s71500 password reset top
Before attempting to reset the password, make sure you have: Create a folder named SET_PWD