Omron Sysmac NJ Series User Manual page 105

Precautions for Correct Use
Do not connect the slave to the end port of the ring X3 that becomes the end point of the ring
topology. You cannot enable the cable redundancy function.
3
In the EtherCAT Tab Page, right-click the originating slave of the ring and select Cable
Redundancy to Enable.
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
5 Setting Up EtherCAT Communications with the Sysmac Studio
Start port of the ring.
Connect the slave to the start port of the ring.
Originating slave of the ring
5
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