Omron NJ101-10 Series, User Manual

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Precautions for Correct Use
• If there is more than one point of disconnection in the communications cables in the ring top-
ology, the master stops communications with slaves to which the communications paths are
broken with the Junction Slave. It continues communications with other slaves. In this case,
an
Illegal Slave Disconnection Detected (84310002 hex) event occurs.
• If a power interruption occurs only at one slave in the ring topology, the master can continue
the normal communications with slaves at which the power interruption does not occur in the
ring topology. In this case, an
Illegal Slave Disconnection Detected (84310002 hex) event oc-
curs.
• If a power interruption occurs at more than one slave in the ring topology, the master stops
communications with the slaves at which the power interruption occurred and slaves to which
the communications paths are broken due to the power interruption. It continues communica-
tions with other slaves. In this case, an
Illegal Slave Disconnection Detected (84310002 hex)
event occurs.
Components of the Ring Topology
The components of the ring topology are shown below.
The following table describes the terms and definitions used for the explanation of the components of
ring topology.
Term Definition
Originating slave of the
ring A Junction Slave that is the starting point of the ring topology. This includes the start
port of the ring and the end port of the ring.
Start port of the ring A port that is the start point of the ring topology.
The start port of the ring is X2 for the GX-JC03.
End port of the ring A port that is the end point of the ring topology.
The end port of the ring is X3 for the GX-JC03.
Slave
Slave
Start port of the ring
End port of the ring
Input port
Output port
EtherCAT master
IN
X2
X3
Originating slave
of the ring
Slave
Ring topology
GX-JC03
Junction Slave
4 EtherCAT Network Wiring
4-5
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
4-1 Supported Network T
opologies
4
4-1-3
Ring T
opology