Omron NE1A-SCPU01 - 07-2009 Operation Manual page 271

Indicator/Display Status and Corrective Actions for Errors
Indicators/display
NS Seven-
segment
display
--- P2
Node
address of
error
--- P2
Node
address of
error
-- P2
Node
address of
error
Error history
I/O Name
No LED Overload Detected
indicator at Test Output
No LED Stuck-at-high
indicator Detected at Test
Output
No LED Under Current
indicator Detected Using
Muting Lamp
Cause
Saved in
nonvola-
tile
memory
See note Overloading was
1. detected at test
output (when a
test output termi-
nal was set as a
standard signal
output).
See note Stuck-on-high at
1. test output (when
a test output ter-
minal was set as
a standard sig-
nal output).
See note Disconnection of
1. indicator light
was detected at
test output (when
Terminal T3 is
set as the mut-
ing lamp signal
output)
Section 12-3
Corrective actions
Check whether the output
signal wire has an earth fault or
is over loaded.
For the wires, check if the
power supply source (positive
side) is contacting the output
signal wire. After the latch input
error time has passed, turn OFF
the input after the cause of the
error has been removed. The
error will be reset. If there is no
fault with the wires, replace the
unit.
Check whether the output
signal wire is disconnected. If
there is no error, check the
indicator light.
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