Mitsubishi Electric MELSEC-Q Series User Manual page 218

(2) The ERR. LED turns on
Check item
Is there a CPU stop error?
Is there an error in all stations?
Is the station No. duplicated?
Is the network parameter incorrect?
(3) The ERR. LED is flashing
Check item
Is the disconnected station displayed in the network map of
the CC-Link IE Field Network diagnostics?
(4) The L ERR. LED turns on
Check item
Are the Ethernet cables operating normally?
Is the switching hub operating normally?
Are other stations connected to the Simple Motion module
operating normally?
Is the master station set to online mode?
Is there any noise affecting the system?
If the above actions do not solve the problem, follow the directions shown in "Communication
is unstable". (Refer to Section 12.4.5.)
(5) The LINK LED turns off
Check item
Are 1000BASE-T-compliant Ethernet cables used?
Is the station-to-station distance 100m or less?
Does the cabling condition (bend radius) meet the
specification?
Is any Ethernet cable disconnected?
Are the switching hub and other stations connected to the
Simple Motion module normal?
If the above action does not solve the problem, "Total Stations" set in the Network
Parameter window for the master station differs from the number of slave stations on
the network. Correct the parameter.
Connect GX Works2 to the CPU module mounted with the Simple Motion
module whose ERR. LED is on, identify the cause of the error, and take
action. (Refer to Section 12.2.)
Perform the troubleshooting shown in "When the D LINK LED turned off or
is flashing". (Refer to (1).)
• Check if 1000BASE-T-compliant Ethernet cables are used.
(Refer to Section 3.2.)
• Check if the station-to-station distance is 100m or less.
(Refer to the "MELSEC-Q QD77GF Simple Motion Module User's Manual
(Positioning Control)".)
• Check if the Ethernet cables are not disconnected.
• Check if a 1000BASE-T-compliant switching hub is used.
(Refer to Section 5.2.2.)
• Check if the switching hub is on.
Check if the systems on other stations are on.
Change the mode of the module to Online. (Refer to Section 7.3.)
Check the wiring condition.
Replace the cables with 1000BASE-T-compliant Ethernet cables.
(Refer to Section 5.2.1.)
Change the station-to-station distance to 100m or less.
Refer to the manual for the Ethernet cable, and correct the bend radius.
Replace the Ethernet cable.
Power on the switching hub and the other stations.
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Chapter 12 TROUBLESHOOTING
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