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 ECA
T 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 EtherCAT Communications
3-18
M1 Series EtherCAT Type User’s Manual (I670)
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