During recording, the CAN controller listens to the CAN bus and stores incoming data. LabSat 3 will transmit
acknowledge pulses on the bus in response to correctly received data unless the ‘Silent Record’ option is ticked. The
ability to transmit acknowledge pulses in ‘LOG FILE’ mode means that it is possible to record data directly from inertial
sensors or other devices with a CAN bus output.
During the replay of data recorded in the ‘LOG FILE’ mode, LabSat scans through the log file, sending the CAN data at
the time intervals indicated by the time-stamp. Because CAN data is transmitted using an active CAN Bus controller,
LabSat will arbitrate by listening to the current bus state and only transmitting the data between other messages that
may be sent from other nodes.
Filtering CAN frames
Filtering of selected CAN frames in the LOG FILE mode can be achieved by creating a file called CANFILTER.TXT in
the root directory of the current SD/HDD. An example of the CANFILTER.TXT file is shown below.
The first two statements automatically configure the CAN Bus baud rates:-
CAN1: 500.00K – this means 500 kbit/s
CAN2: 47.06K – this means 47.06 kbit/s
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Summary of Contents for LabSat 3
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