Siemens Simantic ET200SP System Manual page 232

SIMATIC memory card
11.1 SIMATIC memory card - overview
Removing a SIMATIC memory card
Only remove the SIMATIC memory card in the POWER OFF or STOP state of the CPU.
Make sure that no writing functions (e.g. loading/deleting a block) are active in STOP mode,
or were active at POWER OFF. To do this, disconnect the communication connections.
If you remove the SIMATIC memory card during a write process, the following problems can
occur:
● The data contents of a file are incomplete.
● The file is no longer readable, or no longer exists.
● The entire content of the card is corrupted.
Inserting the SIMATIC memory card in the CPU in the STOP operating state triggers 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 this data differs, the CPU automatically triggers general reset
(i.e. the retentive data is deleted) and then changes to STOP.
In connection with removal of the SIMATIC memory card, also pay attention to the following
FAQ on the Internet (https://support.industry.siemens.com/cs/ww/en/view/59457183).
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.
Deleting the contents of the SIMATIC memory card
You have the following options for deleting the content of the SIMATIC memory card:
● Delete files using Windows Explorer
● Format with STEP 7
Note
If you format the card with Windows utilities, you will render the SIMATIC memory card
unusable as a storage medium for a CPU.
Deletion of files and folders is permitted, with the exception of the "__LOG__" and
"crdinfo.bin" system files. The CPU needs these system files. When you delete the files, you
will no longer be able to use the SIMATIC memory card with the CPU.
If you have deleted the "__LOG__" and "crdinfo.bin" system files, format the SIMATIC
memory card as described in the following section.
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Distributed I/O system
System Manual, 12/2016, A5E03576849-AG