Socket error during Send operation

What does ERR_SOCKET_SEND mean?

An error occurred during the socket send operation. This indicates a failure to transmit data over an established Modbus TCP connection, often due to a broken connection or issues with the remote peer.

• Physical network connection broken after establishment (e.g., cable unplugged).
• Remote peer closing the connection unexpectedly or becoming unresponsive.
• Internal network stack buffer issues or corruption.

Click steps to track your progress.

1. 1

   Verify the physical network connection (cables, switches) between the controller and the remote device.

2. 2

   Check the status of the remote Modbus TCP device to ensure it is active and responsive.

3. 3

   Monitor network traffic to identify packet loss, retransmissions, or disconnections.

4. 4

   Restart the controller to clear temporary network stack issues.