Decommissioning
C.2 Securely removing data
Automation system
368 System Manual, 01/2023, A5E03461182-AK
Deleting data
For secure deletion of data from the CPU, IM, analog modules and the SIMATIC Memory Card,
follow these steps in the order given:
1. Reset analog modules inserted centrally and distributed in your TIA Portal project back to
their factory-stored calibration values.
You can find detailed information on the steps required to reset the calibration values to
factory settings in the function manual Analog Value Processing
(https://support.industry.siemens.com/cs/ww/en/view/67989094).
2. Format the SIMATIC Memory Card.
The format operation deletes all contents from the SIMATIC Memory Card.
Formatting with STEP 7:
– Establish an online connection.
– Open the online and diagnostics view of the CPU (either from the project context or via
"Accessible devices").
– In the dialog window, select "Functions > Format memory card" and then click the
"Format" button.
Formatting using the display of a CPU
– In the display of the CPU, select the menu "Settings" > "Card functions" > "Format card"
and confirm with OK.
3. Reset the CPU/interface module to factory settings.
We recommend resetting the CPU/interface module in STEP 7. When you reset a CPU to
factory settings, select the options shown in the figure before the reset.
Figure C-1 Resetting the CPU to factory settings
If you reset the CPU using STEP
7 and you have selected the "Format memory card" option,
you can skip step 2 of the described sequence of steps.
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