Instructions:
It is not possible for users to format an MMC. All you can do is
"reset" an MMC, which deletes all user data. Proceed as
follows.
- The MMC is slotted in the bay of the CPU. Your CPU requests an
overall reset (slow blinking of the STOP LED).
- Set the switch to MRES and hold it there (approx. 9 seconds)
until the STOP LED lights continuously.
- Within the next 3 seconds you must let the switch go and set it
again to MRES. The STOP LED now blinks during the delete
procedure.
If the MMC continues to request an overall reset after the
procedure described above, then it is defective.
Note:
It is only possible to reset the MMC if it contains data that is
invalid for the CPU. Otherwise the MMC is only initialized by the
procedure described.
Warning:Do not use the MMC for non-SIMATIC
purposes and do not format it with a
third-party device. This would possibly overwrite the internal
structure of the MMC that cannot be restored. In this case the MMC
is no longer recognized/accepted in a SIMATIC CPU and can no longer
be used with SIMATIC devices.
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