The most reliable way to clear a forgotten password on an S7-1500 is to perform a factory reset using a SIMATIC Memory Card (SMC). This method will erase the current user program and configuration from the PLC.
Follow the onscreen prompts to confirm. The CPU will clear all internal data and return to a "clean" state. 3. Using TIA Portal for Known Passwords siemens s71500 password reset top
Select and choose the type of reset required (e.g., Factory Reset). The most reliable way to clear a forgotten