Manual Memory Reset - Siemens SIMATIC S7-1500 System Manual
Automation system
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Also See for SIMATIC S7-1500:
- System manual (523 pages) ,
- Function manual (402 pages) ,
- Manual (188 pages)
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9.5.2
Manual memory reset
Reason for manual memory reset
Memory reset is required to reset the CPU to its "original state".
Options for performing memory reset on a CPU
There are three options for performing a memory reset on the CPU:
● Using the operating mode switch
● Using the display
● Using STEP 7
Procedure using the operating mode switch
Note
Memory reset ↔ Reset to factory settings
The selector operation described below also reflects the procedure for a memory reset:
• Selector operation with inserted SIMATIC memory card: Memory reset is executed
• Selector operation without inserted SIMATIC memory card: Reset to factory settings is
Proceed as follows to reset the CPU memory using the mode selector switch:
1. Set the operating mode switch to the STOP position.
2. Set the operating mode switch to the MRES position. Hold the selector in this position
3. Within the next three seconds, switch the operating mode switch back to the MRES
Result: The CPU executes memory reset.
Procedure using the display
To navigate to the desired "Memory reset" menu command, select the following sequence of
menu commands and confirm after each selection with "OK".
● Settings → Reset → Memory reset
Result: The CPU executes memory reset.
S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB
executed
Result: The RUN/STOP LED lights up yellow.
until the RUN/STOP LED lights up for the 2nd time and remains continuously lit (this
takes three seconds). After this, release the selector.
position, and then back to STOP again.
Commissioning
9.5 Memory reset
123
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