EtherCAT Master
Slave A
Junction Slave
Device X
Slave B
Slave C Slave D Slave F Slave GSlave E
Device ZDevice Y
Ring Disconnection Status
Although the ring is disconnected between Slave C and D, all slaves continue communications.
EtherCAT Master
Slave A
Junction Slave
Devi
ce X
Slave B
Slave C Slave D Slave F Slave GSlave E
Device ZDevice Y
Open circuit
Stop Device X to Z and then turn OFF the power supply to the EtherCAT master. Fix the ring dis-
connection status by replacing the cable, and then turn ON the power supply to the EtherCAT mas-
ter and to the devices, which returns the system to the normal communications status.
3-9-5
Relation between the Network Configuration Information and the
Actual Configuration
The following table shows the relation between the network configuration information downloaded in
an NJ/NX-series CPU Unit supporting the cable redundancy function and the actual configuration.
3 EtherCAT Communications
3-19
M1 Series EtherCAT Type User’s Manual (I670)
3-9 Cable Redundancy Function
3
3-9-5 Relation between the Network Configuration Information and the Actual Configuration