ovr Receive

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Too many receive telegrams are present on the system bus (CAN). This overload can cause issues with processing incoming communication data, potentially leading to lost messages or communication delays.

• Excessive message traffic on the CAN bus, exceeding the controller's receive buffer capacity or processing rate.
• A malfunctioning CAN device (e.g., `CAN_Slave_Motor_Drive`) is flooding the bus with unsolicited or excessively frequent messages.
• Insufficient CPU resources on the controller to process incoming CAN messages quickly enough, leading to buffer overflow.
• Incorrect configuration of the CAN receive buffer size (e.g., `CANCfg_RxBufferSize` parameter) in the controller's settings, making it too small.
• Lower priority of the CAN receive task compared to other CPU-intensive tasks, delaying message processing and causing buffer overflow.

Klikk på steg for å spore fremgangen.

1. 1

   1. Use a CAN bus analyzer (e.g., PCAN-Explorer) to monitor total bus load and identify devices that are transmitting messages at an unusually high rate or with unnecessary frequency.

2. 2

   2. Optimize the PLC program's CAN receive handling logic to process incoming messages more efficiently, potentially by filtering or grouping data.

3. 3

   3. Adjust the CAN bus baud rate (e.g., `CANCfg_BaudRate` in `P8-01`) to a higher speed if the bus is operating below its capacity, which might alleviate congestion.

4. 4

   4. Increase the CAN receive buffer size in the controller's configuration (e.g., `CANCfg_RxQueueDepth`) if sufficient memory is available and justified by bus load.

5. 5

   5. Review task priorities in the controller's configuration (e.g., `CAN_Receive_Task_Priority`) to ensure the CAN receive task has adequate priority for message processing.