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9 Troubleshooting
NX-series Digital I/O Unit User’s Manual (W521)
9-5 T
rou
bles S
p
e
cific T
o
Each
T
yp
e of NX Un
it
s
9
9-5-
1 Digit
al In
put
s
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.
Summary of Contents for NX-IA3117
Page 34: ...Sections in this Manual 32 NX series Digital I O Unit User s Manual W521...
Page 52: ...1 Features and System Configuration 1 18 NX series Digital I O Unit User s Manual W521...
Page 56: ...2 Specifications 2 4 NX series Digital I O Unit User s Manual W521...
Page 152: ...5 I O Refreshing 5 36 NX series Digital I O Unit User s Manual W521...
Page 204: ...8 Digital Mixed I O Units 8 8 NX series Digital I O Unit User s Manual W521...
Page 224: ...9 Troubleshooting 9 20 NX series Digital I O Unit User s Manual W521...
Page 230: ...10 Inspection and Maintenance 10 6 NX series Digital I O Unit User s Manual W521...
Page 337: ...I 1 I NX series Digital I O Unit User s Manual W521 Index...
Page 340: ...I 4 NX series Digital I O Unit User s Manual W521 Index...