Omron SYSMAC CJ1W-EIP21, Operation Manuals

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13 Troubleshooting
13-54
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
13-8 Precautions on Equipment
Replacement
If the EtherNet/IP Unit becomes faulty, it may affect the operation of the other nodes with which it com-
municates. Take immediate steps to recover operation as soon as possible.
We recommend that you keep a spare EtherNet/IP Unit available to restore network operation as
quickly as possible.
Observe the following precautions when you replace the EtherNet/IP Unit.
• Turn OFF the power supply to the Controller before you replace the EtherNet/IP Unit.
• Check the new Unit to make sure that there are no errors.
• When you return an EtherNet/IP Unit for repair, attach a sheet of paper detailing the problem and
return the Unit to your OMRON representative.
If there is a faulty contact, try wiping the contact with a clean cotton cloth dampened with alcohol.
Remove any lint before you mount the Unit.
Precautions for Correct Use Precautions for Correct Use
To prevent electric shock when replacing the EtherNet/IP Unit, always stop communications in
the network and turn OFF the power supply to all of the nodes before removing the Unit.
After you replace the EtherNet/IP Unit, make sure that the wiring and the following settings are the
same as before the Unit was replaced.
• Node Address and Unit Number
Set the rotary switches on the front of the Unit to same value as the Unit that was replaced.
• Configuration Data (Parameter Settings)
The configuration data is saved in non-volatile memory in the EtherNet/IP Unit. Therefore, you must
either transfer the configuration data from the previous Unit to the computer or reset the configuration
data. Use the applicable Support Software.
• Unit Settings (e.g., Local IP Address)
Use the Sysmac Studio to transfer the data or to set the data again. Refer to Section 5 Sysmac
Studio Settings for the EtherNet/IP Unit.
• Parameter Settings (e.g., Parameters for Tag Data Links)
Use the Network Configurator to transfer the data or to set the data again. Refer to Section 7 Tag
Data Link Functions.
Precautions for Correct Use Precautions for Correct Use
When you replace the CPU Unit, start operation only after you transfer the data that was used
before the replacement. Use the Sysmac Studio. Unexpected accidents may occur depending on
the relation between the user program and the status of variables with a Retain attribute.
13-8-1 Precautions When Replacing the EtherNet/IP Unit
13-8-2 Settings Required after Unit Replacement