Omron NX-OD5256 User Manual

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9 Troubleshooting
NX-series Digital I/O Unit User’s Manual (W521)
9-5 Troubles Specific To Each Type of NX Units
9
9-5-1 Digital Inputs
9-5 Troubles Specific To Each Type of NX
Units
9-5-1 Digital Inputs
Problem Assumed cause Correction
Although a connected
external device is ON,
nothing is input and the
input indicator is not lit
either.
The I/O power is not supplied. Check that the I/O power is supplied.
The I/O power supply voltage
is outside the rated range.
Set the I/O power supply voltage within the rated
range.
The Unit is not wired correctly
with the connected external
device.
Check the wiring with the connected external
device.
The wiring to the connected
external device is discon-
nected.
Check the wiring with the connected external
device.
A connected external device
is defective.
Replace the connected external device.
A connected external
device is ON and the input
indicator is lit, but nothing
is input.
A communications error
occurred.
Check if a communications (NX bus) error
occurred.
There is a delay in the ON
and OFF timing for input
values.
An input filter may be set. Set the input filter value to 0. Alternatively, change
the input filter to an appropriate value.

Omron NX-OD5256 Specifications

General

Brand	Omron
Model	NX-OD5256
Category	I/O Systems
Language	English