5 TROUBLESHOOTING
5.1 Checking with LEDs
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5
When the NS LED is flashing in red
When the NS LED is flashing in red, check the following.
When the SD/RD LED does not turn on during data communication
When the SD/RD LED does not turn on during data communication, check the following.
If the above actions do not solve the problem, perform the hardware test to check for RJ71EIP91 failure. ( Page 119
Hardware Test)
Check item Action
Is the EtherNet/IP device connected correctly? • Check whether the operating status of the EtherNet/IP device is normal.
• Check for errors in the line status.
• The line may be busy, so retry at a later time.
Check item Action
Is the ERR LED on or flashing? Take the actions displayed in the module diagnostics. ( Page 112
Checking the Module Status)
Is the Ethernet cable connected correctly? • Connect the Ethernet cable again.
• Perform a PING test to check the line status. ( Page 118 PING test)
Are the parameter settings correct? Revise the following items with EtherNet/IP Configuration Tool.
• Model and name of the connected EtherNet/IP device
• IP address of the connected EtherNet/IP device
• Version of the registered EDS file
Are there any errors in the program? • Check that 'EtherNet/IP communication start request' (Y10) is on.
• Check and correct the data communication program.
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