Kvaser Eagle User's Guide
25(30)
Kvaser AB, Mölndal, Sweden
— www.kvaser.com
To save yourself a lot of trouble, always terminate the CAN bus properly.
6.9
CAN Bus Overrun
Under extremely heavy load, high bit rates and long bursts of messages, the Kvaser Eagle
can lose messages. This loss should be a rare occasion. If such a loss occurs, the Kvaser
Memorator Tools will display a notification message when the log file is extracted. Some of
the file formats, that support such a feature, will also indicate when the overrun occurred.
(See the help section in the Kvaser Memorator Tools for details about file formats.)
To avoid losing important messages during logging, filters can be used. This will
decrease the load on the Kvaser Eagle and ensure that important information is
not lost.
6.10 Daisy-chaining Several Interfaces
You can daisy chain several Kvaser Eagle units to gain additional logging capacity. To do
this,
1. Connect the trigger output of one device to the trigger input of the next device.
2. Using the Kvaser Memorator Tools, configure the trigger output of the first device to
emit a pulse when the disk becomes full.
3. Configure the trigger input of the second device to start logging when a falling edge is
detected. Set the post-trigger time to 0 (infinite) and the pre-trigger time to 1 second.
You now have a setup where the second unit starts logging when the first one becomes full.
