Omron NX Series Hardware User Manual

EtherCAT Communications
If the cable redundancy function is enabled, always write a program to confirm that the
network is in the cable redundancy status. If the program is not written, you cannot
check that the network is not in the cable redundancy status due to a disconnection on
the ring topology.
Use the _EC_RingBreaking system-defined variable to confirm that the network is in
the cable redundancy status.
Safety Precautions
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NX-series NX502 CPU Unit Hardware User's Manual (W629)

Omron NX Series Specifications

General

Brand	Omron
Model	NX Series
Category	Controller
Language	English