Mitsubishi Electric MELSEC iQ-R Series User Manual page 93

When the L ERR LED turns on
When the L ERR LED turns on, check the following.
Check item
Are the Ethernet cables used normally?
Is the switching hub used operating normally?
Are other stations connected to the remote head module operating normally?
Is the mode of the module on the master station set to Online?
Is there any source of noise near the module or cables?
Is the loopback function enabled for the master station?
If the above actions do not solve the problem, perform the following tests to check for an error.
• Module communication test ( Page 94 Module communication test)
• Cable test ( MELSEC iQ-R CC-Link IE Field Network User's Manual (Application))
When the LINK LED turns off
When the LINK LED turns off, check the following.
Check item
Are the Ethernet cables used normally?
Does the cabling condition (bending radius) meet the specifications?
Are the switching hub and other stations connected to the remote head
module operating normally?
If the above actions do not solve the problem, perform the following tests to check for an error.
• Module communication test ( Page 94 Module communication test)
• Cable test ( MELSEC iQ-R CC-Link IE Field Network User's Manual (Application))
When the CTRL LED is flashing
When the CTRL LED is flashing, check the following.
Check item
Has a moderate error or major error occurred in the remote head module of
the standby system?
Is the D LINK LED of the remote head module of the standby system off or
flashing?
Is the SBY LED of the remote head module of the standby system flashing?
Are the operating statuses of the remote head modules of both systems (RUN
state/STOP state) mismatch?
Action
• Check if the Ethernet cable which conforms the standard is used. (
User's manual for the master/local module used)
• Check if the station-to-station distance is set within range. ( MELSEC
iQ-R CC-Link IE Field Network Remote Head Module User's Manual
(Startup))
• Check if the Ethernet cables are not disconnected.
• Check if a switching hub which conforms the standard is used. ( User's
manual for the master/local module used)
• Power off and on the switching hub.
Check the operation status of modules on other stations.
Change the mode to Online. ( User's manual for the master/local module
used)
Change the location of the module or cables.
When the loopback function is enabled, check if 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
• Check if the Ethernet cable which conforms the standard is used. (
User's manual for the master/local module used)
• Check if the station-to-station distance is set within range. ( MELSEC
iQ-R CC-Link IE Field Network Remote Head Module User's Manual
(Startup))
• Check if the Ethernet cables are not disconnected.
Refer to the manual for the Ethernet cable, and correct the bending radius.
Check if the switching hub and other stations are powered on.
Action
Perform troubleshooting using ERR LED. ( Page 89 When the ERR LED
turns on or is flashing)
Perform troubleshooting using D LINK LED. ( Page 90 When the D LINK
LED turns off, Page 90 When the D LINK LED is flashing)
The memory is being copied from the control system to the standby system.
Wait until memory copy from the control system to the standby system was
completed, the remote head module of the standby system is automatically
reset, and the system is restarted.
Match the operating statuses of both systems (RUN state/STOP state).
4 TROUBLESHOOTING
4.2 Checking with LED
4
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