Omron CQM1H-CLK21 - Manual (Page 314)

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Troubleshooting Using Indicators Section 9-1
Node Cannot Participate
in Data Link The following table describes the LNK and M/A indicators when a node can-
not participate in the data links.
Data link participation depends on the Controller Link Unit operating normally
and participating in the Network. Refer to Troubleshooting with RUN, ERC,
ERH and INS Indicators earlier in this section and check Unit operation before
using the following table.
Data Link Cannot be
Stopped Stopping the data link depends on the Controller Link Unit operating normally
and participating in the Network. Read the above explanations before
attempting to stop operation.
Note Stop the data link from the node at which the LNK indicator is lit (indicating
active data links). Data links cannot be stopped from nodes which do not have
active data links.
9-1-4 Repeater Units
Note Be sure to turn OFF the power to the Repeater Unit before disconnecting or
reconnecting cables.
Indicators Probable cause Probable remedy
LNK M/A
Lit --- Data link operating normally. ---
Flashing Lit When manual setting is used,
there is an error in the data link
table. Refer to 5-2-2 Manual Setting
and remake the data link table.
Flashing Not lit When automatic setting is
used, the data link parameters
at the startup node are incor-
rect for the local node (the
data link area is out of range
for the local node.) Refer to 5-2-4 Automatic Set-
ting, reset the parameters for
the startup node DM Area so
that the local node can partici-
pate in the data link, and then
restart the data link.
Automatic setting is used with
1:N allocations, but the device
does not support this function. Use a Controller Link Unit that
supports automatic data link
creation with 1:N allocations.
Refer to Automatic Setting on
page 129 for details.
Not lit Lit When manual setting is used,
there are no data link tables
set for the local node. Set data link tables for the
local node.
Not lit Not lit When automatic setting is
used, the startup node is not
set to participate in the data
links. Stop the data links, remake
and set the parameters in the
startup node’s DM Area, and
then restart the data link.
T/R2
T/R1
PWR
PWR: ON
T/R1: SL1 com
T/R2: SL2 com