Siemens SIMATIC S7-1500 Manual page 20

Product overview
2.6 Functions
Procedure using the display
To reach the desired menu command, "Memory reset", select the following sequence of
menu commands. Confirm with "OK" after each selection.
● Settings → Reset → Memory reset
Result: The CPU performs a memory reset.
Procedure using STEP 7
To perform a memory reset of the CPU via STEP 7, follow these steps:
1. Open the "Online Tools" task card of the CPU.
2. Click the "MRES" button in the "CPU control panel" pane.
3. Click "OK" to confirm the security prompt.
Result: The CPU is in STOP mode and performs a memory reset.
Response of the memory objects to the memory reset
The following table provides an overview of which memory objects are retained and which
are initialized when you reset memory.
Table 2- 2 Retentive characteristics of the memory objects
Memory object
Actual values of the data blocks, instance data blocks
Bit memories, timers and counters
Retentive tags of technology objects (for example, calibration values of absolute encoders)*
Diagnostics buffer entries (retentive area)
Diagnostics buffer entries (non-retentive area)
IP address
Counter readings of the operating hours counters
Time
* The retentive tags of technology objects are retained, but the contents of certain tags are partially re-initialized.
Reference
You will find more information about "Memory reset" in the Memory reset section in the
S7-1500, ET 200MP (http://support.automation.siemens.com/WW/view/en/59191792)
system manual.
20
Contents
Initialized
Initialized
Retained
Retained
Initialized
Retained
Retained
Retained
CPU 1515-2 PN (6ES7515-2AM00-0AB0)
Manual, 12/2014, A5E32332431-AB