Siemens SIMATIC HMI KP400 Comfort Operating Instructions Manual page 63

Memory card
The following data is saved on the memory card:
● Logs
● Data backups
● User data
● Recipes*
* To store recipes on the memory card, select "\Storage Card SD\" as the path in WinCC.
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You can use commercially available memory cards with the "SD(IO / HC)" or "MMC" format.
For reasons of data consistency, Siemens recommends the use of the SIMATIC HMI
Memory Card as memory card, see Accessories (Page 22).
Note
Data consistency
When the HMI device is switched off, consistency of the stored data is ensured only for the
SIMATIC HMI Memory Card ≥ 2 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.
The consistency of data stored in logs is only guaranteed if you use RDB format.
Frequency
Logs are stored at a frequency of approx. 0.2 Hz. Therefore, small amounts of data may be
lost 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" 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 in your project. This way you reduce your system 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
Format of the system memory card
Only a SIMATIC HMI Memory Card ≥ 2 GB may be used as a system memory card. All other
memory cards are not recognized as system memory card by the HMI device.
Comfort Panels
Operating Instructions, 07/2017, A5E36770603-AB
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Commissioning the device
4.1 Overview
63