Omron NJ101-10 Series, Руководство пользователя

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Operation of the Cable Redundancy Function
The operation of the cable redundancy function is described below.
• If there is only one point of disconnection in the communications cables in a ring topology and its
state changes from the cable redundancy status to the ring disconnection status, a Ring
Disconnection Detected (84390000 hex) event occurs and the state of the communications cables
and the point of disconnection are provided in the following system-defined variables.
a)
_EC_RingBreaking (Ring Disconnection)
b) _EC_RingBreakNodeAdr (Slave Node Address Before Ring Disconnection)
Additional Information
When the observation event level is set for the Ring Disconnection Detected event, even the
event occurs, the event is not displayed in current errors. To detect a broken cable in a ring top-
ology, monitor the above system-defined variables with the user program.
If the event level is set to the minor fault and the event occurs, it is displayed on the current
errors in the Sysmac Studio.
• When you repair the point of disconnection, for example, by replacing the cables in the ring discon-
nection status, the topology state automatically changes to cable redundancy status.
Procedure to Set the Cable Redundancy Function
Use the Sysmac Studio and enable the cable redundancy function for a part of the EtherCAT network
configuration where you want to set a ring topology.
The procedure to set the GX-JC03 Junction Slave as the originating slave of the ring is described be-
low.
1
In the EtherCAT Tab Page, drop the Junction Slave that becomes the originating slave of the
ring, to the master or slave.
Originating slave of the ring
2
Drop the slave to the start port of the ring X2 that becomes the start point of the ring topology.
The slave is connected to the start port of the ring. If you add more slaves, drop a slave to the
connected slave and then connect the slave to the start port of the ring.
5 Setting Up EtherCAT Communications with the Sysmac Studio
5-6
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)