Operating Instructions OS-IT-xx9
General Information
R. STAHL HMI Systems GmbH / OI_IT_xx9_en_V_01_00_07.docx / 06.12.2019
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11.2.7
Switching off / closing down
The Microsoft Windows operating system stores key data in the main
memory, regardless of the application, and has to store this data on
the hard disk before the HMI device is switched off.
It is therefore important for the safe and correct operation that the HMI
device is "shut down" properly (see illustration below) and not simply
switched off.
Otherwise the existing image of the HMI device may be damaged,
rendering the device non-functioning.
11.2.8
Loss of data
In the case of applications that require constant writing into memory,
R. STAHL HMI Systems GmbH recommends you use external storage
media (USB sticks, network servers) for these write processes.
Try and avoid cyclical writes (log files, databases, etc.) to the SSD.
The endurance of an SSD depends on the number of write cycles
(TBW / terabytes written).
Writing to the SSD with a simultaneous drop in voltage is most likely
going to result in data loss.
NOTICE
NOTICE
ATTENTION
ATTENTION
