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Indicator/Display Status and Corrective Actions for Errors
Section 10-3
10-3 Indicator/Display Status and Corrective Actions for Errors
Critical Errors
Abort Errors
Nonfatal Errors
Indicators/display
Error history
MS
NS
Seven-
segment
display
Name
Saved in
nonvolatile
memory
Cause
Corrective actions
OFF
OFF
OFF
None
Not sup-
ported
• Noise level higher than
expected.
• Critical hardware fault
Cycle the power supply and
check operation.
If the problem recurs, the NE1A-
series Controller may be faulty.
• Check whether there is any
influence from noise, and take
whatever corrective actions are
required.
Lit red
OFF
Left: H
Right: ---
System Fail-
ure
As much
saved as
possible.
• Before operation, the
safety output terminal or
test output terminal was
short-circuited to 24
VDC.
• Noise impact more than
expected.
• Critical hardware fault
• Check the external wiring for
power supply short-circuiting at
the output terminal.
• Check whether there is any
influence from noise, and take
whatever corrective actions are
required.
• Turn the power OFF and back
ON and check operation.
• If the problem recurs, the
NE1A-series Controller may be
faulty.
Indicators/display
Error history
MS
NS
Seven-
segment
display
Name
Saved in
nonvolatile
memory
Cause
Corrective actions
Flashing
red
Flashing
green or
Lit green
E8
Ù
Node
address of
error
Switch
Setting Mis-
match
Yes
The node address and
baud rate were changed
after the normal comple-
tion of configuration
download.
• Configure the switches prop-
erly.
• Reset the configuration data.
Indicators/display
Error history
Cause
Corrective actions
NS
Seven-
segment
display
I/O
Name
Saved in
nonvola-
tile
memory
Lit red
F0
"
Node
address of
error
---
Duplicate MAC ID
See note
1.
Node address
duplication
(Same node
address set for
more than one
node.)
Check the node addresses of
other nodes.
Switch ON the power supply
again after reconfiguring with-
out duplication.
Lit red
F1
"
Node
address of
error
---
Bus OFF
See note
1.
Bus Off
(Comunications
cut off because
of frequent data
errors.)
Check the following points and
take corrective actions for each,
then turn ON the power supply.
• Make sure the baud rate is the
same for all nodes.
• Make sure the cable lengths
(main/branch) are not too
long.
• Make sure the cable is not dis-
connected or loose.
• Make sure terminating resis-
tance is at both ends of the
main line and only at both
ends.
• Make sure that there is not a
lot of noise.
Summary of Contents for NE1A-SCPU01 - 07-2009
Page 3: ...iv...
Page 9: ...x TABLE OF CONTENTS...
Page 11: ...xii...
Page 15: ...xvi...
Page 70: ...35 Installation Section 3 1 Top Top Bottom Bottom...
Page 72: ...37 Installation Section 3 1 3 1 3 Dimensions and Weight Dimensions NE1A SCPU01 V1...
Page 85: ...50 Wiring Section 3 2...
Page 123: ...88 Explicit Message Communications Section 4 7...
Page 141: ...106 Safety Outputs Section 5 4...
Page 257: ...222 Connection Status Tables Section 10 8...
Page 261: ...226 NE1A series Controller Replacement Section 11 2...
Page 264: ...229 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 266: ...231 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 267: ...232 Appendix A Local Output Setting Example...
Page 269: ...234 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 270: ...235 Appendix A Local Output Setting Example...
Page 273: ...238 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 275: ...240 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 276: ...241 Appendix A Local Output Setting Example...
Page 289: ...254...
Page 293: ...258 Index...