4 TROUBLESHOOTING
4.1 Checking with LED
101
4
When the D LINK LED turns off or is flashing
When the D LINK LED turns off or is flashing, check the following.
If the above actions do not solve the problem, perform the following tests to check for an error.
• Cable test (
When the L ERR LED turns on
When the L ERR LED turns on, check the following.
If the above actions do not solve the problem, perform troubleshooting for when communication is unstable. (
When communication is unstable)
Check item
Action
Is the master station operating normally?
• 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))
• Check if the master station is performing data link using CC-Link IE Field
Network diagnostics. (
Page 105 Checking the Network Status)
Is the master station connected to the network?
Check if the master station is performing data link using CC-Link IE Field
Network diagnostics. (
Page 105 Checking the Network Status)
Do the used Ethernet cables conform to the Ethernet standard?
Replace the cables with the Ethernet cable which conforms the standard.
(
MELSEC iQ-R Simple Motion Module User's Manual (Startup))
Does the station-to-station distance meet the specifications?
Set the station-to-station distance within range. (
MELSEC iQ-R Simple
Motion Module User's Manual (Startup))
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.
Are 121 or more slave stations connected?
Change the connection of the slave stations to 120 stations or less.
Are other stations connected to the Simple Motion module operating
normally?
• Check if the modules on the other stations are performing data link using
CC-Link IE Field Network diagnostics. (
• Check the operation status of modules on other stations. (
User's manual
for the module used)
Is the switching hub used operating normally?
• Check if the switching hub which conforms the standard is used.
(
MELSEC iQ-R Simple Motion Module User's Manual (Startup))
• Power off and on the switching hub.
Are station Nos. unique?
Change the duplicated station No.
The devices having different network types (such as CC-Link IE Controller
Network and CC-Link IE Controller Network) are connected to the same
network line.
Divide it into CC-Link IE Controller Network (Ethernet cable) and the network.
After taking the above actions, power off and on or reset all stations where the
error was detected.
Check item
Action
Are the Ethernet cables used normally?
• Check if the Ethernet cable which conforms the standard is used.
(
MELSEC iQ-R Simple Motion Module User's Manual (Startup))
• Check if the station-to-station distance is set within range. (
MELSEC iQ-
R Simple Motion Module User's Manual (Startup))
• Check if the Ethernet cables are not disconnected.
Is the switching hub used operating normally?
• Check if the switching hub which conforms the standard is used.
(
MELSEC iQ-R Simple Motion Module User's Manual (Startup))
• Power off and on the switching hub.
Are other stations connected to the Simple Motion module operating
normally?
• Check if the modules on the other stations are performing data link using
CC-Link IE Field Network diagnostics. (
• Check the operation status of modules on other stations. (
User's
manual for the module used)
Is "Module Operation Mode" under "Application Settings" of the master station
set to "Online"?
Set "Module Operation Mode" under "Application Settings" of the master
station to "Online".
Is there any source of noise near the module or cables?
Change the location of the module or cables.
Summary of Contents for RD77GF16
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