Serial port overflow

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The serial port buffer has overflowed, indicating that data is being received faster than it can be processed. This can lead to loss of communication or corrupted data.

• Data being transmitted to the serial port (e.g., RS-485, RS-232) at a baud rate higher than the drive's processing capability.
• Excessive, unsolicited communication messages from a connected master device.
• Software bug in the drive's serial communication handler failing to process incoming data quickly enough.
• High processor load within the drive diverting resources from serial communication tasks.
• Intermittent noise on the serial lines corrupting data and causing re-transmission attempts that fill the buffer.

Klikk på steg for å spore fremgangen.

1. 1

   Reduce the baud rate of the connected master device to match P8-10 (Baud rate) or a lower, more stable rate.

2. 2

   Verify Parameter P8-11 (Protocol) is correctly configured for the connected device (e.g., FC Protocol, Modbus RTU).

3. 3

   Check the integrity of the serial communication cable for proper shielding and verify termination resistors are correctly installed.

4. 4

   Monitor the communication traffic using a protocol analyzer to identify if an external device is sending excessive data.

5. 5

   Update the drive firmware to the latest available version to address potential communication handler bugs.