Socket error during Connect operation

What does ERR_SOCKET_CONNECT mean?

An error occurred during the socket connect operation. This prevents the Modbus TCP client from establishing a connection to a remote Modbus TCP server, often due to network connectivity problems or incorrect destination settings.

• Remote Modbus TCP server is unreachable or not listening on the specified port.
• Network connectivity issues (e.g., cable disconnected, faulty switch, firewall blocking).
• Incorrect remote IP address or port configured in the Modbus TCP client settings.

Click steps to track your progress.

1. 1

   Verify the remote Modbus TCP server's IP address and port are correctly configured in the client settings.

2. 2

   Ping the remote Modbus TCP server's IP address from the controller to check network connectivity.

3. 3

   Ensure no firewall is blocking the Modbus TCP port (default 502) between the client and server.