Reinsert the card into the CPU and power it on. The CPU will now be empty and ready for a new download without a password prompt. 2. Reset to Factory Settings (TIA Portal)
This is the most common method if you cannot go online due to the forgotten password. By clearing the SIMATIC Memory Card , you force the PLC to start with an empty configuration. Power off the CPU and remove the SMC. Step 2: Insert the card into a standard PC card reader.
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 siemens s7-1500 password reset
Check the box "Delete password for protection of confidential PLC configuration data" if applicable. Click Reset and confirm the prompt. 3. Reset via the CPU Display
Do you have a to reload onto the PLC after the reset? Reinsert the card into the CPU and power it on
Use Windows Explorer to delete the user program files. Delete the S7_JOB.S7S file and the SIMATIC.S7S folder. CRITICAL: Do NOT format the card in Windows.
Resetting via the display deletes the password for protecting confidential PLC configuration data. 4. Manual Hardware Reset (Mode Selector) Reset to Factory Settings (TIA Portal) This is
If you can still establish an online connection (e.g., if you have "Read access" but lost the "Write access" password), you can use TIA Portal to perform a factory reset.
You can also use the physical mode selector switch on the front of the CPU: Set the switch to . Remove the memory card.
Hold the selector in the position until the RUN/STOP LED lights up steadily for the second time (approx. 3 seconds), then release it.