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4. Troubleshooting (EtherNet/IP)
4.3.2 Problems and Countermeasures
Master Unit LED
MS NS
Error Description [Reference]
Green
Light ON
Green
Light ON
Normal
communication
- Normal condition
Green
Light ON
Green
Light
Blinking
During connection
establishment
- Processing connection establishment
(The NS LED will be ON in green in a few seconds.)
- Master function in stop state
(Communication does not start.)
Green
Light ON
Red Light
Blinking
Communication
timeout
- Network channel error
Green
Light ON
Light OFF IP address not
defined
- The IP address is not defined
Red Light
Blinking
No Matter Critical error [Refer to the section 4.3.3 Tests and diagnostics.]
- Unrecoverable critical error
Red Light
ON
No Matter Module error [Refer to the section 4.3.3 Tests and diagnostics.]
- Recoverable error occurred
Light OFF No Matter error [Refer to the section 4.1.2.5 Absent Slave.]
- No slave (Error detection before communication
establishment)
- Communications power supply OFF
Light OFF Light OFF Not initialized status [Refer to the section 2.9.5 Master Mode and 2.9.6
Slave Mode.]
- The communication board is not initialized
Check the configuration
Fieldbus I/O Rev.6 143