Operating Instructions OS-IT-xx9
General Information
Page 16 of 20
R. STAHL HMI Systems GmbH / OI_IT_xx9_en_V_01_00_01.docx / 19.12.2017
11.1.5
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.
11.1.6
Note on Windows Embedded operating systems
When using the Windows Embedded 7 operating system on the Panel PC SERIES 400 HMI
devices, the C:\ system drive can be protected from unauthorised writing (EWF).
This is not the case for other Windows operating systems!
R. STAHL HMI Systems GmbH recommends you leave the write
protection filter on at all times.
For further information on this write protection (EWF),
please refer to the OpenHMI_help_en.chm help file in the
"STAHL" folder on the HMI device or on the CD / DVD /
USB stick that is included in the delivery.
11.1.7
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.
NOTE
CAUTION
DOCUMENTATION
NOTE
NOTE
CAUTION
CAUTION
