Siemens SIMATIC S7-1500 System Manual page 194

Maintenance
13.5 Reset to factory settings
Perform a reset to factory settings as follows:
1. Set the mode selector to the STOP position.
Result: The RUN/STOP LED lights up yellow.
2. Set the mode selector to the MRES position. Hold the mode selector in this position until
the RUN/STOP LED lights up for the 2nd time and remains continuously lit (this takes
three seconds). After this, release the selector.
3. Within the next three seconds, switch the mode selector back to the MRES position, and
then back to STOP again.
Result: The CPU executes a "Reset to factory settings", during which time the RUN/STOP
LED flashes yellow. When the RUN/STOP LED lights up yellow, then the CPU has been
reset to factory settings, and is in the STOP mode. The "Reset to factory settings" event is
entered into the diagnostics buffer.
Note
The IP address of the CPU is also deleted when the CPU is reset to the factory settings
through the mode selector.
Procedure using the display
Make sure that the CPU is in STOP mode (CPU shows STOP mode or RUN/STOP LED
lights up yellow).
To navigate to the desired "Factory settings" menu command, select the following sequence
of menu commands and confirm after each selection with "OK".
● Settings → Reset → Factory settings
Result: The CPU executes a "Reset to factory settings", during which time the RUN/STOP
LED flashes yellow. When the RUN/STOP LED lights up yellow, then the CPU has been
reset to factory settings, and is in the STOP mode. The "Reset to factory settings" event is
entered into the diagnostics buffer.
Note
The IP address of the CPU is also deleted when the CPU is reset to the factory settings
through the display.
194
Automation system
System Manual, 12/2014, A5E03461182-AC