Siemens SIMATIC S7-1500 System Manual page 341

3. If you want to keep the IP address, select the "Keep IP address" option button. If you want
to delete the IP address, select the "Delete IP address" option button.
NOTE
"Delete IP address" deletes all IP addresses, regardless of how you established the online
connection.
If a SIMATIC memory card is inserted, selecting the "Delete IP address" option has the
following effect:
– The IP addresses are deleted and the CPU is reset to factory settings.
– The configuration (including IP address) on the SIMATIC memory card is then
4. Click the "Reset" button.
5. Click "OK" in response to the confirmation prompts.
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 in yellow, the CPU has been reset to factory
settings and is in STOP. The "Reset to factory settings" event is entered in the diagnostics
buffer.
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
downloaded to the CPU. If there is no saved configuration (because the SIMATIC
memory card has been cleared or formatted, for example), no new IP address is
assigned.
13.5 Resetting CPUs to factory settings
Maintenance
341