Frequently asked questions about UniCAN data loggers.
Channel and message groups can be designed as a linear buffer ("Linear") or as a circular buffer ("Circular"). Depending on this, the memory management of the logger behaves as follows:
(you may reduce the size of the buffer per recording group)
Simultaneous disconnection of ignition- and supply-cable is possible, but the following points must be observed:
A selection of channels can be combined in a channel group. For this purpose, signals from signal sources are combined and inserted into a channel group by means of drag & drop into the directory structure of "Channel groups". A total of up to eight channel groups can be created.
Message groups record the data of CAN messages as binary data received at the CAN input. In order to simplify the evaluation and to limit the data volume, filters can be defined that only allow data for certain ID groups to pass through. A total of up to eight message groups can be created.
It is only possible to delete a channel group if no channel in the group is assigned to a condition.
If it is not possible to delete the selected channel, please check whether channels are assigned to conditions. If so remove the corresponding channel from the condition. Then it should be possible to delete the channel again.
CANstim is an additional firmware option of the data logger. This firmware option enables Stimulation groups to be defined, which enable an initial, periodic and final transmission of constant message sequences via CAN bus when a trigger is activated. A maximum of 512 CAN messages can be sent periodically across all stimulation groups.
Further information on the stimulation groups can be found in the UniCAN user manual in chapter 220.127.116.11 Transmission groups.
The number of firmware options can be extended even after logger purchase. Please contact your personal customer advisor or email@example.com for further information.
In a configuration with UMTS/LTE transmission, the SOM file is transferred to the server each time the logger is started. The two marked codes indicate how much space is available for the measurement data.
Further information about the SOM file can be found in the UniCAN user manual in chapter 10.5 Contents of the SOM file.
A deleted measurement configuration can not be restored from the CF card. On the CF-card there is stored only a reduced measurement configuration in binary format. The binary setup contains just enough information to record the data.
As the user, please make sure that you saved your measurement configuration or the entire project and create backups of the respective measurement configuration.