Omron NE1A-SCPU01 - 07-2009 - Indicator;Display Status and Corrective Actions for Errors

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Indicator/Display Status and Corrective Actions for Errors Section 12-3
12-3 Indicator/Display Status and Corrective Actions for Errors
Critical Errors
Note Not applicable to Pre-Ver. 1.0 Controllers. Applicable to unit version 1.0 or
later (including Controllers that support EtherNet/IP).
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.
Lit red
OFF
P6 System Fail-
ure
(See note.) A safety output terminal or
test output terminal
shorted to 24-VDC before
operation started.
• Check the external wiring for
power supply short-circuiting at
the output terminal.
• Turn the power OFF and back
ON and check operation. If the
problem recurs, the NE1A-
series Controller may be faulty.