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5 EtherCAT Communications

AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)

5-9 Cable Redundancy Function

5-9-4 Slave Communications Statuses When Cable Redundancy Function Is Used

This section takes the following example in which the cable redundancy function is used and a ring

topology is configured, and describes communications statuses during normal operation and in the ring

disconnection status. The configuration example contains three devices in the ring topology.

 Normal Status

All slaves are in communication.

 Ring Disconnection Status

Although the ring is broken between Slave C and D, all slaves continue communications.

Stop Device X to Z and then turn OFF the power supply to the EtherCAT master. Fix the ring discon-

nection status by replacing the cable, and then turn ON the power supply to the EtherCAT master

and to the devices, which returns the system to the normal communications status.

5-9-4 Slave Communications Statuses When Cable Redundancy Func-

tion Is Used

EtherCAT Master

Slave A

Junction Slave

Device X

Slave B

Slave C Slave D Slave F Slave GSlave E

Device ZDevice Y