Socket error during Accept operation

What does ERR_SOCKET_ACCEPT mean?

An error occurred during the socket accept operation. This prevents the Modbus TCP server from accepting incoming client connection requests after a successful listen, often due to system resource limitations or internal network stack issues.

• System resource limitations (e.g., maximum number of open sockets or connection queue full).
• Network stack issues preventing new connections from being fully established.
• High volume of connection attempts overwhelming the server.

Click steps to track your progress.

1. 1

   Check the number of active Modbus TCP connections and ensure it does not exceed the controller's capacity.

2. 2

   Verify system resources are not exhausted by other processes.

3. 3

   Restart the controller to clear temporary network stack issues or stuck connections.