ERR_SOCKET_UNBIND
Socket error during Unbind operation
Allen-Bradley · MicroLogix 1400 Programmable Controllers
What does ERR_SOCKET_UNBIND mean?
An error occurred during the socket unbind operation. This indicates a failure to release the local IP address and port associated with a socket, potentially leaving resources held or in an unstable state.
Common Causes
- System resource conflict preventing the release of the bound socket.
- Internal operating system error during the unbind process.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Restart the controller to force a clean release of network resources.
- 2
Verify that no other processes are interfering with the Modbus TCP socket's binding.
Verified technical data. Last updated: March 2026
Related Faults
Source: Allen-Bradley MicroLogix 1400 Programmable Controllers