Siemens SIMATIC S7-1500/ET 200MP System Manual page 274

Procedure using the mode selector
Note
Memory reset ↔ Reset to factory settings
The procedure described below also corresponds to the procedure for resetting to factory
settings:
• Selector operation with inserted SIMATIC memory card: CPU executes a memory reset
• Selector operation without inserted SIMATIC memory card: CPU executes reset to factory
settings
To perform a memory reset of the CPU using the mode selector, follow these steps:
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 switch in this position until the
RUN/STOP LED lights up for the second time and remains continuously lit after 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 memory reset.
For information on resetting the CPU to factory settings, refer to the section Resetting the
CPU to factory settings (Page 319).
Procedure using the mode selector keys (standard, F-CPUs / compact CPUs from article number
6ES751x-xxx02-0AB0/6ES751x-1CK01-0AB0)
Note
Memory reset ↔ Reset to factory settings
The procedure described below also corresponds to the procedure for resetting to factory
settings:
• Key operation with inserted SIMATIC memory card: CPU executes a memory reset
• Key operation without inserted SIMATIC memory card: CPU executes reset to factory
settings
To perform a memory reset of the CPU using the mode selector keys, follow these steps:
1. Press the STOP mode selector key.
Result: The STOP ACTIVE and RUN/STOP LED light up yellow.
2. Press the STOP operating mode button until the RUN/STOP LED lights up for the 2nd time
and remains continuously lit after 3 seconds. After this, release the key.
3. Press the STOP mode selector key again within the next three seconds.
Result: The CPU executes memory reset.
For information on resetting the CPU to factory settings, refer to the section Reset CPU to
factory settings (Page 319).
Automation system
System Manual, 01/2023, A5E03461182-AK
Commissioning
12.6 CPU memory reset
273