3 EtherCAT Communications
3
Check the location where the ring is disconnected.
• Check that the L/A OUT indicator of "Inverter A" and the L/A IN indicator of "Inverter B" are
OFF.
• Check that the other the L/A IN indicators and the L/A OUT indicators blink.
• Stop operation and turn OFF the power supply to the EtherCAT master and to the slaves.
• Connect the disconnected cable to the ECAT IN connector on "Inverter B".
4
With a cable disconnected from another connector, check that the communications continue in
the ring disconnection status.
• Disconnect the cable from the ECAT OUT connector on "Inverter B", and protect the discon-
nected cable connector.
• Turn ON the power supply to the EtherCAT master and to the slaves.
• Check that there is no problem with the EtherCAT master and the slaves.
5
Check the location where the ring is disconnected.
• Check that the L/A OUT indicator of "Inverter B" and the L/A IN indicator of "Inverter C" are
OFF.
• Check that the other the L/A IN indicators and the L/A OUT indicators blink.
• Stop operation and turn OFF the power supply to the EtherCAT master and to the slaves.
• Connect the disconnected cable to the ECAT OUT connector on "Inverter B".
Now you are done with checking operation.
3-9-4
Slave Communications Statuses When Cable Redundancy Func-
tion 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.
3-18
M1 Series EtherCAT Type User's Manual (I670)