Kvaser Air Bridge Light HS User’s Guide 9 (24)
Before power is indicated, the LEDs briefly perform an LED test,
indicate states related to the establishment of the radio link and
indicate state of the autobaud detection.
3.5 Autobaud Detection
The Kvaser Air Bridge Light HS provides an Autobaud Detection feature which will
automatically detect and connect to any of the following CAN network bit rates:
•1 Mbit/s
•500 Kbit/s
•250 Kbit/s
•125 Kbit/s.
The Autobaud Detection is done locally, so a Kvaser Air Bridge Light HS can be
used to bridge two different CAN networks operating at different bit rates. However,
the amount of traffic on the networks will determine whether the system designer
should allow the networks to be bridged via the Kvaser Air Bridge Light HS.
Autobaud is the process of automatically selecting the correct bus
parameters for communication on the connected CAN bus based
on received CAN traffic. The Autobaud Detection is driven by the
reception of CAN messages on the CAN network. This means
that there needs to be existing CAN traffic on the network for the
Autobaud Detection to work.
If, after 15 seconds of power on, only one of the paired units have done a
successful Autobaud Detection, the other unit will be configured to the same CAN
network bit rate. The Autobaud Detection will continue even after 15 seconds, if
none of the supported CAN system bit rates have been detected on either of the
connected CAN networks.
If the Kvaser Air Bridge Light HS is used to bridge two different
CAN networks operating at different bit rates, both CAN networks
needs to send messages during the initial 15 seconds after
power on in order for the Autobaud Detection to correctly detect
the different bit rates.
For any additional/specific bit rate requirement, please contact Kvaser for more
info.
Kvaser AB, Mölndal, Sweden — www.kvaser.com
