10 TROUBLESHOOTING
10.1 Checking with LED
197
10
When the L ER LED turns on
When the L ER LED turns on, check the following.
When the LINK LED turns off
When the LINK LED turns off, check the following.
If the above actions do not solve the problem, perform the module communication test to check for hardware failure. (
Page 200 Module communication test)
Are time synchronization devices with time synchronization
priority of 0 to 15 connected?
Remove time synchronization devices with time synchronization priority of 0 to 15, or
change the priority to between 16 and 255.
Manual for the time synchronization devices used
Is the connected industrial switch (for CC-Link IE TSN Class B)
operating normally?
Power off and on the industrial switch (for CC-Link IE TSN Class B).
Check the industrial switch (for CC-Link IE TSN Class B) parameters and correct their
settings. For the setting method, refer to the manual for the industrial switch (for CC-Link
IE TSN Class B).
The main check items are as follows:
• Enable each port of the industrial switch (for CC-Link IE TSN Class B).
• Set the communication speed and port type to Auto.
• Match the settings for the time synchronization and communication cycle of the
industrial switch (for CC-Link IE TSN Class B) to those of the master station.
• Match the VLAN setting of the master station to that of the device stations.
Check item Action
Do the used Ethernet cables conform to the Ethernet standard? • Use an Ethernet cable that conforms to the standard. ( Page 15
Performance Specifications of CC-Link IE TSN)
Does the station-to-station distance meet the specifications? Set the station-to-station distance within range. ( Page 15 Performance
Specifications of CC-Link IE TSN)
Is any Ethernet cable disconnected? Replace the Ethernet cable.
Is the industrial switch used operating normally? • Use an industrial switch that conforms to the standard. ( Page 15
Performance Specifications of CC-Link IE TSN)
• Power off and on the industrial switch.
Is there any source of noise near the module or cables? Change the location of the module or cables.
Check item Action
Do the used Ethernet cables conform to the Ethernet standard? Replace the cables with Ethernet cables which conform to the standard. (
Page 128 Ethernet cable)
Does the station-to-station distance meet the specifications? Set the station-to-station distance within range. ( Page 15 Performance
Specifications of CC-Link IE TSN)
Does the cabling condition (bending radius) meet the specifications? Refer to the manual for the Ethernet cable, and correct the bending radius.
Is any Ethernet cable disconnected? Replace the Ethernet cable.
Is the industrial switch used operating normally? • Use an industrial switch that conforms to the standard. ( Page 128
Industrial switch)
• Power off and on the industrial switch.
Are other stations connected to the FX5-CCLGN-MS operating normally? Take action by referring to the manual for the modules of other stations.
Does the communication speed of the connected device match the
communication speed set in "Communication Speed"?
Connect the device with the communication speed set in "Communication
Speed".
Is the communication speed of connected devices 1Gbps? Connect devices that support a communication speed of 1Gbps.
If the communication speed is set to 100Mbps for the master station and local
stations to connect a device with a communication speed of 100Mbps, is the
auto-negotiation of the connected device valid?
Enable the auto-negotiation of the connected device.
Or, connect a device with auto-negotiation enabled.
Check item Action
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