5-2 Connecting to the Host Using Controller Link
5-23
Troubleshooting with LNK Indicator
- Data Links Cannot Be Started
The following table describes the LNK indicator and remedies when a data link cannot be
started.
Starting a data link depends on the Controller Link Interface Unit operating normally and par-
ticipating in the network. Refer to Troubleshooting with RUN, ERC, ERH, and INS Indicators
earlier in this section and check operation before using the following table.
Indicator Probable cause Remedy
LNK
Lit
Data link operating normally.
¾¾¾¾
Flashing There is an error in the data link tables. If ERH or ERR indicator is lit, reset the data link
tables.
When manual setting is used, either data link
tables have not been created for the startup
node or there is an error in the data link tables.
Create the data link tables for the startup node
using the CX-Server.
Not lit Manually set data links are already operating on
the same Network.
Set data link tables for the local node.
Automatically set data links are already operat-
ing on the same Network.
Stop the data links, review and set the pa-
rameters in the startup node's DM area, and
then restart.
The PT cannot be the startup node for auto-
matic settings. Settings must be performed at
Controller Link Unit on the PLC.
- Node Cannot Participate in Data Links
The following table describes the LNK indicator and remedies when a Node cannot partici-
pate in the data links.
Data link participation in the network depends on the Controller Link Interface Unit operating
normally and participating in the network. Refer to Troubleshooting with RUN, ERC, ERH, and
INS Indicators earlier in this section and check operation before using the following table.
Indicator Probable cause Remedy
LNK
Lit Data Link operating normally.
¾¾¾¾
Flashing When manual setting is used, there is an error
in the data link table.
Reset data link tables using the CX-Server.
Not lit When manual setting is used, there are no Data
Link Tables set for the local node.
Set the data link tables for the local node.
When automatic setting is used, the setup node
is not set to participate in the data links.
Stop the data links, remake and set the pa-
rameters in the Startup node’s DM Area, and
then restart the data links.
Setting must be performed at PLC on the Con-
troller Unit side, because the Controller Link
Interface Unit cannot be the startup node for
automatic settings. For details, refer to the
Controller Link Units Operation Manual.
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