Omron Sysmac NX Series User Manual page 229

The disconnection indication does not clear. An output device is dis-
The disconnection detection is not per-
formed.
The user calibration is not accepted.
Although the external device connected to
the trigger input terminal is ON, nothing is
input and the IN indicator is not lit either.
NX-series Analog I/O Units User's Manual for High-speed Analog Input Units (W592)
Problem Assumed cause
connected.
The input is significantly
out of the output device
measurement range.
Wiring is incorrect. (Posi-
tive and negative are re-
versed etc.)
The user calibration error
is too large.
The input range is not set
to 1 to 5 V or 4 to 20 mA.
The line disconnection de-
tection is disabled.
An attempt was made to
make calibration with in-
puts outside the correc-
tion range.
The I/O power is not sup-
plied.
The I/O power supply volt-
age is outside the rated
range.
The Unit is not wired cor-
rectly with the connected
external device.
The wiring to the connect-
ed external device is dis-
connected.
A connected external de-
vice is defective.
There is a problem with
the Unit.
The High-speed Analog
Input Unit is not installed
in the upright orientation.
A Relay Output Unit (NX-
OC££££) is connected
next to the High-speed
Analog Input Unit.
9 Troubleshooting
Correction
Restore the output device connec-
tion.
Check the output device and input
type.
Check that the input is correct.
Check that the wiring is correct.
Execute the user calibration again.
Check the input range.
To use the line disconnection detec-
tion, set the Disconnection Detection
Enable/Disable setting to Enable.
Input the voltage/current within the
correction range from the input de-
vice and make the calibration again.
If the voltage/current within the cor-
rection range cannot be input,
change the connecting method to the
input device.
Check that the I/O power is supplied.
Set the I/O power supply voltage
within the rated range.
Check the wiring with the connected
external device.
Check the wiring with the connected
external device.
Replace the connected external de-
vice.
Cycle the power supply to the Unit.
If the problem persists even after the
power supply is cycled, replace the
Unit.
The High-speed Analog Input Units
can be installed only in the upright
orientation, regardless of the destina-
tion to which they are connected. In-
stall the High-speed Analog Input
Unit in the upright orientation.
Do not connect a Relay Output Unit
(NX-OC££££) next to the High-
speed Analog Input Unit.
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