Omron NX701-17 Series User Manual page 225

9 Troubleshooting
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 Ether-
CAT 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
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NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)