Digital Outputs - Omron NX-ID3343 User Manual

9 Troubleshooting
9-5-2

Digital Outputs

Problem
When the output is ON,
nothing is output although
the output indicator is lit.
Although the output is ON,
nothing is output and the
output indicator is not lit
either.
Cannot hold outputs when
communications errors
occur.
Cannot clear outputs
when communications
errors occur.
9 - 18
Assumed cause
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.
The Unit is not wired correctly
with the connected external
device.
The wiring to the connected
external device is discon-
nected.
A connected external device
is defective.
A communications error
occurred.
The load rejection output set-
ting is set to "OFF".
The load rejection output set-
ting is set to "Hold the present
value".
Correction
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 device.
Check if a communications (NX bus) error
occurred.
Set the load rejection output setting to "Hold the
present value".
Set the load rejection output setting to "OFF".
NX-series Digital I/O Unit User's Manual (W521)