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286
Troubleshooting Using Indicators
Section 9-1
• Setting hardware switches.
Indicators
Probable cause
Probable remedy
RUN
ERC
ERH
INS
Lit
Not lit Not lit Lit
Unit operating normally;
Network participation nor-
mal.
---
Not lit Lit
---
---
Controller Link Unit faulty.
If the ERC indicators still
lights when the Unit is
mounted on another PLC,
replace the Controller Link
Unit.
Not lit Not lit Not lit Not lit Power is not being sup-
plied correctly to the PLC.
Check the power supply
voltage and supply at the
recommended voltage.
The Controller Link Unit
has become loose.
Secure the Controller Link
Unit firmly.
The Controller Link Unit is
mounted in the wrong slot.
Refer to
Unit correctly.
The Controller Link Unit is
faulty.
If the indicators do not light
when the Unit is mounted
in another PLC, replace
the Controller Link Unit.
Lit
Lit
---
Not lit The node address is out-
side the setting range.
Reset the node address to
within the 1 to 32 range.
The same node address is
being used by two different
Units.
Reset so that each node
address is used only once
within the same Network.
Lit
---
Lit
---
Routing table setting error
or a Routing Table Enable/
Disable Bit setting error.
Remake and set the rout-
ing table correctly, referring
to
When no routing
table is being used, set the
Routing Table Enable/Dis-
able Bit to OFF.
The Unit is mounted to a
non-compatible PLC.
Refer to
and reinstall the Unit on
the appropriate PLC.
An error has occurred in
the PLC.
Refer to the PLC’s opera-
tion manual and correct
the error. If the error occurs
again, replace the PLC.
EEPROM error
Refer to
, cor-
rect the data where the
error has occurred, and
reset the Unit. If the error
occurs again, replace the
Controller Link Unit.
The unit number is not set
in the range from 0 to 15.
Reset the Unit number to
within a range of 0 to 15.
The same unit number is
set more than once for the
same PLC.
Reset so that each unit
number is set only once
within the same PLC
(including the Expansion
CPU Backplane.)
I/O tables have not been
created for the PLC or they
are faulty.
Create I/O tables for the
PLC correctly.
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 ...