Siemens SIMATIC HMI Unified Comfort MTP700 Operating Instructions Manual page 70

Operating the device
4.7 Memory concept and memory cards
Data memory card
The following data is saved on the memory card:
● Logs
● Data backups
● User data
● Parameter sets*
* To store parameter sets on the memory card, select "\Storage Card SD\" as the path in
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WinCC.
You can use commercially available memory cards with "SD(IO/HC)" format as data memory
card. For reasons of data consistency, Siemens recommends the use of the SIMATIC SD
memory card ≥ 32 GB as data memory card, see section "Accessories (Page 16)".
Note
Data consistency
When the HMI device is switched off, the consistency of the stored data is ensured only for
the SIMATIC SD memory card ≥ 32 GB.
With commercially available memory cards, switching off the device may result in the loss of
saved data, for example, due to a power failure.
Frequency
Logs are stored at a frequency of approx. 0.2 Hz. This may result in small amounts of data
not being saved shortly before a power failure.
Use a UPS to avoid data loss even shortly before a power failure.
System memory card
The system memory card is part of the service concept of the HMI devices. If you enable the
"Automatic backup (Page 108)" function, all data from the internal memory of the HMI device
is transferred to the system memory card. If the HMI device fails, you insert the system
memory card into a replacement device. Once the replacement device starts, you can
continue working on your project. This way you reduce your plant downtimes to a minimum.
The system memory card is not visible in the user interface of the HMI device and it cannot
be used for data storage. In order for the HMI device to recognize the system memory card,
you have to insert the system memory card into the slot designed for it.
Note
Type of system memory card
Only the SIMATIC SD memory card ≥ 32 GB is permitted for use as a system memory card.
All other memory cards are not recognized as system memory card by the HMI device.
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Unified Comfort Panels
Operating Instructions, 03/2020, A5E46641217-AA