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6 Access protection
VEGAPULS C 21 • SDI-12
58342-EN-200121
6 Access protection
6.1 Bluetooth radio interface
Devices with a Bluetooth radio interface are protected against un-
wanted access from outside. This means that only authorized persons
can receive measured and status values and change device settings
via this interface.
A Bluetooth access code is required to establish Bluetooth com-
munication via the adjustment tool (smartphone/tablet/notebook).
This code must be entered once when Bluetooth communication is
established for the first time in the adjustment tool. It is then stored in
the adjustment tool and does not have to be entered again.
The Bluetooth access code is individual for each device. It is printed
on the device housing and is also supplied with the device in the infor-
mation sheet "
PINs and Codes
". It can be changed by the user after
the first connection has been established. If the Bluetooth access
code has not been entered correctly, a new entry can only be made
after a waiting period has elapsed. The waiting time increases with
each additional incorrect entry.
The emergency Bluetooth access code enables Bluetooth communi-
cation to be established in the event that the Bluetooth access code
is no longer known. It can't be changed. The emergency Bluetooth
access code can be found in information sheet "
Access protection
".
If this document is lost, the emergency Bluetooth access code can
be retrieved from your personal contact person after legitimation.
The storage and transmission of Bluetooth access codes is always
encrypted (SHA 256 algorithm).
6.2 Protection of the parameterization
The settings (parameters) of the device can be protected against un-
wanted changes. The parameter protection is deactivated on delivery,
all settings can be made.
To protect the parameterization, the device can be locked by the user
with the aid of a freely selectable device code. The settings (param-
eters) can then only be read out, but not changed. The device code
is also stored in the adjustment tool. However, unlike the Bluetooth
access code, it must be re-entered for each unlock. When using the
adjustment app or DTM, the stored device code is then suggested to
the user for unlocking.
The emergency device code allows unlocking the device in case the
device code is no longer known. It can't be changed. The emergency
device code can also be found on the supplied information sheet "
Ac-
cess protection
". If this document is lost, the emergency device code
can be retrieved from your personal contact person after legitimation.
The storage and transmission of the device codes is always encrypt-
ed (SHA 256 algorithm).
Bluetooth access code
Emergency Bluetooth
unlock code
Device code
Emergency device code
