Omron Sysmac NJ Series User Manual page 207

This is the procedure to find error locations when "Failed" is displayed for the number of error
frames.
In the EtherCAT network configuration, "Failed" is sometimes displayed for more than one
EtherCAT slave.
In the network configuration for example 2, assume that "Failed" is displayed for the number of
error frames for node addresses 4 and 5.
If "Failed" is displayed for the number of error frames, the EtherCAT slave currently cannot com-
municate. If an EtherCAT slave cannot communicate, all of the EtherCAT slaves connected after
it may not be able to communicate. In the network configuration diagram of example 2, node
address 5 is connected after node address 4.
Therefore, you can assume that there is an error in node address 4 that prevents communica-
tions.
Concretely, you can assume the following possible error locations.
• The device at node address 64
• The cable between the output port at node address 64 and the input port at node address 4
or the connectors at those ports
• The device at node address 4
 Step 4: Implementing Corrections for Error Locations
Implement corrections for the error locations that you found.
To check the position of the EtherCAT slave with an error in the network configuration, refer to the
Node Address|Network configuration display under Slave Diagnostic and Statistical Information.
The following table provides corrections for the causes as assumed from the diagnostic and statisti-
cal information.
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
9 Troubleshooting
9-9
9