Mitsubishi Electric MELSEC iQ-R Series User Manual page 143

When the D LINK LED turns off or is flashing
When the D LINK LED turns off or is flashing, check the following.
Check item
Is the master station operating normally?
Is the master station connected to the network?
Does the IP address of each station match the
"Network Configuration Settings" under "Basic
Settings" of the master station?
In the "Network Configuration Settings" under
"Basic Settings", are the third and fourth octets of
the IP address of the master station overlapped
with those of any other stations?
In the "Network Configuration Settings" under
"Basic Settings", does the network address
(subnet mask part) of the IP address of the master
station match that of other stations?
Are the third and fourth octets of the IP address set
to all 0 or all 1?
Is the host address of the IP address set to all 0 or
all 1?
Is a reserved address set to the IP address?
Do the used Ethernet cables conform to the
Ethernet standard?
Is the switching hub used operating normally?
Does the station-to-station distance meet the
specifications?
Does the cabling condition (bending radius) meet
the specifications?
Is any Ethernet cable disconnected?
Is the network topology different from the one set
in "Network Topology" under "Basic Settings" of
the master station used?
Has the time synchronization source station been
reset?
Is the time synchronization source station turned
off?
Is the time synchronization source station
operating normally?
Has any other station been reset?
Are other stations turned off?
Are other stations connected to the Motion module
operating normally?
Is there any other station that has not set an IP
address?
Is there any other station that is not set in "Network
Configuration Settings" under "Basic Settings" of
the master station?
Is a network topology with restrictions used for
connection?
Are station Nos. unique?
Action
• If an error has occurred in the CPU module on the master station, eliminate the cause of the CPU
module error. ( MELSEC iQ-R CPU Module User's Manual (Application))
• If an error occurs in the Motion module, take action according to the module diagnosis procedure. (
Page 144 Checking the Module Status)
Connect the master station to the network.
Correct the setting of the IP address in "Network Configuration Settings" under "Basic Settings" of the
master station.
• Set IP addresses in a way that does not overlap the third to fourth octets of the IP address in all
stations.
• Set the IP address and subnet mask to match the network addresses of all stations.
• Set the third and fourth octets of the IP address to values other than all 0 or all 1.
• Set the host address of the IP address to values other than all 0 or all 1.
• Set an IP address other than a reserved address.
Replace the cables with Ethernet cables which conform to the standard. For details, refer to "Wiring" (in
the chapter of the control mode used) of the following manual.
MELSEC iQ-R Motion Module User's Manual (Startup)
• Use a switching hub that conforms to the standard. For details, refer to "Wiring" (in the chapter of the
control mode used) of the following manual.
MELSEC iQ-R Motion Module User's Manual (Startup)
• Power off and on the switching hub.
Set the station-to-station distance within range. For details, refer to "Wiring" (in the chapter of the control
mode used) of the following manual.
MELSEC iQ-R Motion Module User's Manual (Startup)
Refer to the manual for the Ethernet cable, and correct the bending radius.
Replace the Ethernet cable.
Correct the wiring according to "Network Topology" under "Basic Settings" of the master station.
(Page 102 Network Topology)
• Since a station is temporarily disconnected after switching the time synchronization source, wait for it to
return.
• Avoid unnecessary disconnections or returns in a station that is the time synchronization source.
Check the manual of the module used for the time synchronization source station.
• Avoid unnecessary reset, since a station is disconnected while resetting.
• Start other stations.
Power on other stations.
• Check if the modules on the other stations are performing data link using CC-Link IE TSN/CC-Link IE
Field diagnostics. ( Page 146 Checking the Network Status)
• Check the operation status of modules on other stations. ( User's manual for the module used)
Set the IP address for the device station for which the IP address is not set.
Set the connected device station to "Network Configuration Settings" under "Basic Settings" of the master
station.
Correct the wiring. For details, refer to "SYSTEM CONFIGURATION" (in the chapter of the control mode
used) of the following manual.
MELSEC iQ-R Motion Module User's Manual (Startup)
Change the overlapped station No..
4 TROUBLESHOOTING
141
4.1 Checking with LED
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