Mitsubishi Electric MELSEC iQ-R Series User Manual page 92

When the D LINK LED turns off
When the D LINK LED turns off, check the following.
Check item
Is the master station connected to the network and operating normally?
Are the Ethernet cables used normally?
Is a switching hub connected in ring topology?
Are the switching hub and other stations connected to the remote head
module operating normally?
Is the switching hub used operating normally?
Is the station number of the remote head module duplicated with any of the
other stations?
Does the network number of the remote head module match with that of the
connected network?
Is an error displayed in the CC-Link IE Field Network diagnostics?
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 D LINK LED is flashing
When the D LINK LED is flashing, check the following.
Check item
Does the station number indicated in the dot matrix LED of the remote head
module match with that of the remote head module specified in the network
configuration setting of the master station?
If the above actions do not solve the problem, connect the engineering tool to the master station and execute the CC-Link IE
Field Network diagnostics. ( User's manual for the master/local module used)
4 TROUBLESHOOTING
90
4.2 Checking with LED
Action
• If an error has occurred in the CPU module on the master station, eliminate
the cause of the CPU module error. ( User's manual for the CPU module
used)
• Connect the engineering tool to the master station, and check if the master
station is performing data link by executing the CC-Link IE Field Network
diagnostics. ( User's manual for the master/local module used)
• 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.
Configure the network in ring topology without a switching hub.
Check if the switching hub and other stations are powered on.
Check if a switching hub which conforms the standard is used. ( User's
manual for the master/local module used)
Change the duplicated station number.
Match the network number of the remote head module with that of the
connected network.
Take the actions displayed on the window.
Action
• Match the network number of the remote head module with that of the
remote head module specified in the network configuration setting of the
master station. ( User's manual for the master/local module used)
• Initialize the remote head module and rewrite the parameter using the
engineering tool.