Siemens SIMATIC S7-1500 System Manual page 234

Removing a SIMATIC Memory Card from the CPU
Note
Do not remove the SIMATIC Memory Card while a write operation is in progress.
If you remove the memory card from the CPU during a write operation, the content of the
memory card may become invalid. The memory areas can then lose their retentivity. You
may need to clear the memory card on the programming device and load the program again.
Proceed as follows to remove the SIMATIC Memory Card:
● Switch off the supply voltage.
Note
If there is no write access over the programming device in progress, you can also remove
the memory card when the supply voltage is on and the system is in STOP. In this case,
first disconnect all communication connections as a precaution.
Inserting the SIMATIC Memory Card in the CPU in STOP state triggers a re-evaluation of the
SIMATIC Memory Card. The CPU compares the content of the configuration on the
SIMATIC Memory Card with the backed-up retentive data. If the backed-up retentive data
matches the data of the configuration on the SIMATIC Memory Card, the retentive data is
retained. If the data differs, the CPU automatically performs a memory reset. A memory
reset deletes the retentive data on the CPU. After the memory reset, the CPU switches to
STOP.
Please also note the following FAQ on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/59457183) relating to the removal of
the SIMATIC Memory Card.
Note
Using the SIMATIC Memory Card as a firmware update card
If you use the SIMATIC Memory Card as a firmware update card, removing and inserting the
card will not result in the loss of retentive data. You can find more information in SIMATIC
Drive Controller firmware update (Page 244).
Removing a SIMATIC Memory Card from Windows computers
If you are using the card in a commercially available card reader under Windows, use the
"Eject" function before you remove the card from the card reader. If you remove the card
without using the "Eject" function, you may lose data.
SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA
SIMATIC memory card
12.1 SIMATIC memory card – Overview
233