Omron NE1A Series - Page 203

204
Indicator/Display Status and Corrective Actions for Errors Section 10-3
--- P1Ù
Node
address of
error
terminal
lit red
Paired ter-
minal
(Dual Set-
ting)
flashing
red
External Test
Signal Failure at
Safety Input
See note
1.
External wiring
error in safety
input.
Check the following points:
• Make sure the input signal
wire is not contacting the
power source (positive side).
• Make sure the input signal
wire does not have an earth
fault.
• Make sure the input signal
wire is not disconnected.
• Make sure there is not a short
circuit between input signal
wires.
• Make sure there is no failure in
the connected devices.
• Make sure the Discrepancy
Time setting values are valid.
To recover from the above
error state, the following condi-
tions are required.
Latch input error time must
have passed and the root cause
must have been removed.
The target safety input terminal
inputs must turn OFF.
To change the discrepancy
time, reconfiguration is
required.
--- P1Ù
Node
address of
error
Target ter-
minal
(Dual Set-
ting)
lit red
Discrepancy Error
at Safety Input
See note
1.
Discrepancy
error between 2
inputs at safety
input.
--- P1Ù
Node
address of
error
Target ter-
minal
lit red
Paired ter-
minal
(Dual Set-
ting)
flashing
red
Internal Input
Failure at Safety
Input
See note
1.
Internal circuit
failure at safety
input.
--- P2Ù
Node
address of
error
No LED
indicator
Overload Detected
at Test Output
See note
1.
Overloading was
detected at test
output (when a
test output termi-
nal was set as a
standard signal
output).
Check whether the output
signal wire has an earth fault or
is over loaded.
--- P2Ù
Node
address of
error
No LED
indicator
Stuck-at-high
Detected at Test
Output
See note
1.
Stuck-on-high at
test output (when
a test output ter-
minal was set as
a standard sig-
nal output).
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.
-- P2Ù
Node
address of
error
No LED
indicator
Under Current
Detected Using
Muting Lamp
See note
1.
Disconnection of
indicator light
was detected at
test output (when
Terminal T3 is
set as the mut-
ing lamp signal
output)
Check whether the output
signal wire is disconnected. If
there is no error, check the
indicator light.
Indicators/display Error history Cause Corrective actions
NS Seven-
segment
display
I/O Name Saved in
nonvola-
tile
memory