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Status Area and Troubleshooting
Section 9-2
Troubleshooting with the PWR Indicator
Troubleshooting with the T/R1 and T/R2 Indicators
9-2
Status Area and Troubleshooting
The status of the Unit and the communications status of the Controller Link
Unit is recorded in the Status Area of the PLC. The cause of errors can be
found by searching the Status Area. The Status Area can be read using a Pro-
gramming Console, the SYSMAC Support Software, or the Controller Link
Support Software.
This section explains the contents of the Status Area and tells how to trouble-
shoot errors recorded there.
indicator
status
Unit status
Possible error
Probable cause
Probable remedy
Lit
Power is being sup-
plied normally
---
---
---
Not lit
Power supply error
Power supply
cables
Cables are loose.
Check the cable connections.
Cables are broken.
Check whether any of the cables
are broken.
Cable polarity is incorrect.
Check the cable connections.
Power supply
Power supply voltage or current is
wrong.
Check the power supply voltage,
and replace the power supply with
a Power Supply Unit that will pro-
vide a correct supply.
Repeater Unit
The Repeater Unit is faulty.
Replace the Repeater Unit.
indicator
status
Unit status
Possible error
Probable cause
Probable remedy
Lit or
flashing
The Unit is commu-
nicating normally.
---
Unit operating normally.
---
Not lit
Communications
error (transmission
signal error or no
signal)
Communica-
tions cables
Cables are loose.
Check the cable connections.
Cables are broken.
Check whether any of the cables
are broken.
Cable polarity is incorrect.
Check the cable connections.
Noise interference in cables.
Check the wiring environment of
the cables.
Other nodes
The destination node does not
exist.
Check the destination Controller
Link Unit status (power supply,
cable connections).
The destination node has an
error.
Check the destination Controller
Link Unit status (baud rate setting,
terminating resistance settings,
statuses, error log, etc.).
Repeater Unit
Terminating resistance is set
incorrectly.
Check the terminating resistance
setting for the network.
The baud rate setting is incorrect. Check that the same baud rate is
set for all nodes in the same net-
work.
Noise interference
Check the operating environment
of the Unit.
The Repeater Unit is faulty.
Replace the Repeater Unit.
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 ...