Operating systems and drivers
Operating Instructions ET-xx8 / MT-xx8
R. STAHL HMI Systems GmbH / OI_ET_MT-xx8_en_V_01_02_03.docx / 10.03.2021
Page 35 of 84
5.4
Data back-up
5.4.1
Recovery Stick
A recovery stick is required to restore the Panel PC devices to their factory state. This
recovery stick (USB drive, also available as an intrinsically safe option) contains the
factory image, with which the system can be restored to factory state within a very short
time.
You can restore the HMI devices to their factory state only with the aid of this recovery stick.
As an option, the recovery stick can also contain a backup software, with which you can back up
your own device configuration.
5.4.2
Back-up
It is the sole responsibility of the operator to generate a back-up of the HMI devices and their
overall function !
Any back-ups generated of the HMI devices must always be stored on external storage
media !
5.4.3
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. After the data has been stored, Windows informs the user that the HMI device can
now be switched off.
Only switch off the HMI device when prompted to do so by a system message !
5.4.4
Loss of data
In the case of applications that require constant writing into memory, use external storage
media (USB sticks, network servers) for these write processes !
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.
