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Troubleshooting Using Indicators
Section 9-1
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.
9-1-3
CVM1 and CV-series Controller Link Units
Troubleshooting with RUN, ERC, ERH and INS Indicators
The RUN, ERC, ERH and INS indicators can be used to check whether Con-
troller Link Unit startup and Network participation are operating normally.
Note
Be sure to turn off the power to the PLC before performing any of the follow-
ing.
• Disconnecting the Unit or connectors.
• Securing Units or connectors.
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
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
, 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
page 131 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.
RUN
ERC
INS
SD
ERH
LNK
RD
TER
M/A
CLK21
RUN: Operating
ERC: Communications
error
INS: Network
participation
LNK: Data
link
M/A:
Data link mode
Summary of Contents for C200HW-CLK21
Page 3: ...iv ...
Page 9: ...x ...
Page 12: ...xiii TABLE OF CONTENTS Index 367 Revision History 373 ...
Page 13: ...xiv ...
Page 19: ...xx ...
Page 57: ...32 Application Precautions Section 1 5 Example CX Programmer Response Timeout Setting ...
Page 69: ...44 Message Service Procedure Section 2 2 ...
Page 111: ...86 Constructing Networks with Repeater Units Section 3 4 ...
Page 154: ...129 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Page 261: ...236 Response Codes Section 6 7 ...
Page 297: ...272 Message Delay Times Section 8 4 ...
Page 353: ...328 Handling Precautions Section 9 6 ...
Page 364: ...339 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 365: ...340 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 369: ...344 Standard Models Appendix A ...
Page 391: ...366 Using the Relay Terminal Block Appendix C ...
Page 397: ...372 Index ...
Page 401: ...376 Revision History ...