Support Question of the Week: How Do I Use the Komodo CAN Interface to View Retried Transmissions on the CAN Bus?

I just purchased the KomodoTM CAN Interface and I need to count the number of retried transmissions on the CAN bus. How can I do that? Please advise.

Thanks for your question! The Komodo CAN Interface monitors the CAN bus for traffic that is sent by the Komodo, as well as the traffic that is successfully sent by other devices. The retried transmissions that can be monitored are the transmissions that were initiated by the Komodo interface. These retried transmissions can be viewed on the Data CenterTM Software. Transmissions that failed from other devices on the CAN bus are not monitored; retries from other devices are not seen by the Komodo interface. Regarding data transmissions from other devices, the Komodo interface can only view the transmissions that are successful.

Using the Komodo interface with the Data Center Software, the overall count of retries from the Komodo analyzer can be monitored. You can filter the data to show only the packets that were delivered from a specific Komodo ID. To see how this works, you can run the example of viewing arbitration that is provided on the Data Center Software, as described below:

Using the Komodo interface with the Data Center Software, the overall count of retries from the Komodo analyzer can be monitored. You can filter the data to show only the packets that were delivered from a specific Komodo ID. To see how this works, you can run the example of viewing arbitration is provided on the Data Center Software, as described below:

  1. Launch the Data Center Software
  2. Click File, click Examples, choose can-activity-board.tdc from the drop menu and then click OK.
    • Case Examples are provided in Data Center Software Figure 1: How to Select a Data Center Software Case Example
  3. Click the Bus tab (at the bottom right of the Data Center Software screen).
  4. In the Navigator window under Description, expand CAN Bus A, right click Device (029), and then choose Filter: Show Only. Only the information about the selected Komodo channel A ID 029 will be displayed.
  5.  In the Navigator window under Description, click CAN Bus A. Information will then be displayed under Statistics.
  6. Scroll down to Arbitration Losses. The data in the Visible column shows the Arbitration Losses in Komodo channel A ID 029.  Note - in the example file, the result of the Arbitration Losses is zero.
View CAN bus arbitration losses on Data Center Software. Figure 2: Arbitration Losses: Number of Retries

For more information, please refer to the following documents:

We hope this answers your question. If you have other questions about our CAN Interfaces, Host Adapters or other Total Phase products, feel free to email us at sales@totalphase.com or submit a request for technical support.

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