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(5) When the D LINK LED turns off
Check item
Does the own station in network operate normally?
Are 1000BASE-T-compliant Ethernet cables used?
Is the station-to-station distance 100m or less?
Does the cabling condition (bending radius) meet the specifications?
Is any Ethernet cable disconnected?
Do other stations connected to the I/O module normally operate?
Does the switching hub normally operate?
Is the station number of the I/O module duplicated with any of other
stations?
(6) When the D LINK LED flashes
Check item
Does the station number setting of the I/O module match the station
number of the I/O module set in the network configuration settings of
the master station or in the CC IE Field Configuration?
Is the station type remote device station?
Is the I/O module a reserved station?
Is the station number setting switch set to other than 1 to 120?
Is stop of the data link checked through CC-Link IE Field Network
diagnostics?
Has the connection been changed to the other master station with a
different network number?
(7) When the L ER LED turns on
Check item
Are Ethernet cables normal?
Does the switching hub in the system normally operate?
Do other stations connected to the I/O module normally operate?
Is the mode of the module on the master station set to other than
Online?
Is there any noise affecting the system?
Is the loopback function enabled for the master station?
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Connect the engineering tool to the master station, and then check that a data link is
established in the own station by using CC IE Field diagnostics.
( User's manual for the master/local module used)
Replace the cable with a 1000BASE-T-compliant Ethernet cable. ( User's manual
for the master/local module used)
Change the station-to-station distance to 100m or less.
Refer to the manual for the Ethernet cable used, and correct the bending radius.
Replace the Ethernet cable.
Check that the power supplies of the other stations are turned on.
• Check that a 1000BASE-T-compliant switching hub is used. ( User's manual for
the master/local module used)
• Check that the power supply of the switching hub is turned on.
Two or more stations are duplicated.
Change the setting so that all the station numbers are different.
Match the station number of the I/O module with the station number set in the network
configuration settings of the master station or in the CC IE Field Configuration.
Change the station type of the module to the remote device station in the network
configuration settings of the master station.
Change the setting of reserved/error invalid station to other than the reserved station
in the network configuration settings of the master station.
Change the setting within the range from 1 to 120.
Check the link status through CC-Link IE Field Network diagnostics and start the link
when the data link is stopped.
• Correct the connection to the previous master station.
• To communicate with the master station with a different network number, power off
and on the I/O module.
• Check that 1000BASE-T-compliant Ethernet cables are used. ( User's manual
for the master/local module used)
• Check that the station-to-station distance is 100m or less.
• Check that the Ethernet cables are not disconnected.
• Check that a 1000BASE-T-compliant switching hub is used. ( User's manual for
the master/local module used)
• Check that the power supply of the switching hub is turned on.
Check that the power supplies of the other stations are turned on.
Change the mode of the module to Online.
Check the status of wiring.
When the loopback function is enabled, check that the ring topology is correctly
configured for the PORT where the L ER LED is on. ( User's manual for the
master/local module used)
Action
Action
Action
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Table of Contents
Troubleshooting
