Modbus Slave TCP Start Failed

What does 0x00090003 mean?

The MODBUS slave failed to start successfully in TCP mode. This diagnostic message is permanently stored and indicates a configuration error, network issue, or resource conflict preventing the TCP server from initializing. This will prevent MODBUS TCP communication.

• Incorrect MODBUS slave TCP configuration settings within the WBM client
• TCP port conflict with another application or service running on the controller
• Network interface card (NIC) issues preventing TCP binding on the controller
• Insufficient system resources for MODBUS slave TCP operation

Click steps to track your progress.

1. 1

   Verify the MODBUS slave TCP configuration settings using the WBM client.

2. 2

   Check for other applications or services using the same TCP port as the MODBUS slave.

3. 3

   Ensure the controller's network interface is active and properly configured for TCP/IP communication.

4. 4

   Review controller system logs for more detailed network or resource errors related to the failure.