Set Local Authentication Mode; 0X50) - WAGO I/O-SYSTEM 750 Manual

136 • Appendix
Mailbox Command References
6.3.5.15 Set Local Authentication Mode (SetLocalAuthenticationMode, 0x50)
With the call up "SetLocalAuthenticationMode", the local authentication
mode of the Bluetooth
modules authenticate each other at each connection establishment. This proc-
ess occurs, per Bluetooth
If MBX_AUTHENTICATION_LINKKEY is set as the authentication mode,
an individual "Link Key" is calculated from the configured PIN during the
first connection (created from the password). If this key has been generated
once, the modules are considered to be "paired" (connected) and do not need
to repeat mutual authentication with a new connection. If the "Link Key" is
deleted, for example during a restart of the device or via "EraseLocalAuthen-
tication", then the password is requested again in order to calculate the "Link
Key". Accordingly, for external devices, a request to enter the password ap-
pears during the first or renewed authentication. In WAGO modules, the
password is archived in the Bluetooth
entered once it has been correctly created.
In authentication mode MBX_AUTHENTICATION_PIN, an authentication is
performed with the PIN instead of using the "Link Key". Using WAGO mod-
ules, this is performed automatically via saved password; for external devices,
the password must generally be re-entered manually with each connection es-
tablishment.
Note
Authentication only ensures that communication partners detect each other's
identity. Protection from the tapping of data is not guaranteed by an authenti-
cation.
Authentication is the prerequisite for the encryption of data transmission.
Modules can only connect to each other if they have the same settings for
encryption, authentication and password.
Conditions
®
Mailbox size Operating mode/profile
6 12 18 Config.
● ● ●
subsystem is set. If the authentication is activated, the
®
standard, under cryptographic safeguards.
®
subsystem and does not have to be re-
Real-
Ad hoc
time
● - -
Device role
Save
config.
Master Slave
● ● ●
WAGO-I/O-SYSTEM 750
I/O Modules
Restart
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