Commissioning
10.7 CPU memory reset
Distributed I/O system
System Manual, 12/2016, A5E03576849-AG
219
10.7.2
Manual memory reset
Reason for a manual memory reset
A memory reset is required to reset the CPU to its "original state".
CPU memory reset
There are two options for performing a CPU memory reset:
●
Using the mode selector
●
Using STEP 7
Procedure using the mode selector
Note
Memory reset
↔ Reset to factory settings
The operation described below also reflects 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 reset the CPU memory using the mode selector, proceed 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 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 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 memory reset.
Procedure using STEP 7
For a memory reset of the CPU using STEP 7 proceed as follows:
1.
Open the "Online Tools" task card of the CPU.
2.
Click the "MRES" button in the "CPU control panel" pane.
3.
Click "OK" in response to the confirmation prompt.
Result: The CPU switches to STOP mode and performs a memory reset.
Summary of Contents for Simantic ET200SP
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