Maintenance
12.7 Resetting CPU/interface module (PROFINET) to factory settings
Distributed I/O system
System Manual, 12/2016, A5E03576849-AG
251
Options for resetting a CPU to factory settings
The following options are available for resetting the CPU to its factory settings:
●
Using the mode selector
●
Using STEP 7
Procedure using the mode selector
Make sure that there is no SIMATIC memory card in the CPU and that the CPU is in STOP
mode (the RUN/STOP LED is lit yellow).
Perform a reset to factory settings when there is no SIMATIC memory card inserted 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 (after three
seconds). After this, release the switch.
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 the "Reset to factory settings", during which time the RUN/STOP
LED flashes yellow. When the RUN/STOP LED lights up yellow, the CPU has been reset to
factory settings and is in the STOP mode. The "Reset to factory settings" event is entered in
the diagnostics buffer.
Procedure using STEP 7
Make sure that an online connection to the CPU exists.
To reset a CPU to factory settings using STEP 7, follow these steps:
1.
Open the Online and Diagnostics view of the CPU.
2.
In the "Functions" folder, select the "Reset to factory settings" group.
3.
If you want to keep the IP address, select the "Retain IP address" option button. If you
want to delete the IP address, select the "Reset IP address" option button.
4.
Click the "Reset" button.
5.
Click "OK" in response to the confirmation prompts.
Result: The CPU executes the "Reset to factory settings", during which time the RUN/STOP
LED flashes yellow. When the RUN/STOP LED lights up yellow, the CPU has been reset to
factory settings and is in the STOP mode. The "Reset to factory settings" event is entered in
the diagnostics buffer.
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