Omron NE1A Series - Indicator;Display Status and Corrective Actions for Errors

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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.