Modbus Slave Buffer Overrun

What does I x .Slave.BufferOverrun mean?

This boolean tag indicates that a buffer overrun occurred within the Modbus slave module's ASIC (Application-Specific Integrated Circuit) during data reception. A value of 1 (Occurrence) means the slave's receive buffer overflowed because incoming data arrived too quickly to be processed. This condition can lead to data loss and unreliable slave operation.

• Communication speed (baud rate) is too high for the slave's processing capability for incoming data
• Modbus master sending excessive data too rapidly or without sufficient delays between messages
• Internal ASIC processing limitations or temporary heavy load on the slave module

Click steps to track your progress.

1. 1

   Reduce the baud rate setting in the module's configuration to allow the ASIC more time to process incoming data.

2. 2

   Ensure the Modbus master is not sending data at an excessively high rate or with insufficient delays between messages.

3. 3

   Verify the slave module's firmware is current to ensure optimal data handling and buffer management.