Omron CJ1W-EIP21 ユーザーズマニュアル

Use the following table to troubleshoot tag data links when the Tag Data Links
Operating Flag (bit 15 in Communications Status 1) does not go ON.

• Confirm that the cable being used has the correct ratings.
• Confirm that the cable is properly connected to the switching 

hub, and the hub’s power supply is ON. (The 7-segment dis-
play will indicate error E1.)

• If the switching hub’s settings can be changed, confirm that 

the Ethernet link settings are the same as the settings for the 
EtherNet/IP Unit or built-in EtherNet/IP port. (For details, 
refer to 3-4 Network Installation.)

• Check whether the same IP address is set on another node. 

(The 7-segment display will indicate error F0.)

• Check whether power is being supplied to the PLC.
• Check whether the EtherNet/IP Unit or built-in EtherNet/IP 

port is mounted in the Backplane correctly.

• If a watchdog timer (WDT) error has occurred in the PLC, fol-

low the procedures described in the PLC’s Operation Man-
ual to correct the problem. 

• All of the indicators for the EtherNet/IP Unit or built-in Ether-

Net/IP port will be OFF if a CPU Bus Unit error has occurred. 
Check for a CPU Bus Unit error.

• Restart the Unit. Replace the Unit if it doesn’t restart.

• If the EtherNet/IP Unit's 7-segment display is displaying an 

error code, refer to the tables in 14-2 Using the LED Indica-
tors and Display for Troubleshooting.

• Confirm that the cables are properly connected to the 

switching hub and the power supply to the switching hub is 
ON.

• If data is being restored by the simple backup function, wait 

until the restore operation is completed.

• If the EtherNet/IP Unit's 7-segment display is displaying an 

error code, refer to the tables in 14-2 Using the LED Indica-
tors and Display for Troubleshooting.

• The NS indicator will continue to flash green if the tag data 

link settings have not been set in the Unit. Use the Network 
Configurator to set the tag data link settings in the Unit, and 
then restart the Unit.

• Identify the error code shown on the 7-segment display 

based on the tables in 14-2 Using the LED Indicators and 
Display for Troubleshooting, and eliminate the cause of the 
error.