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8 Troubleshooting
NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
8-3 Ch
eckin
g
fo
r Er
ro
rs and
T
rou
blesh
oot
ing
on
the
Supp
ort So
ftwar
e
8
8-3
-4 Meaning of Er
ror
Cause and
correction
Assumed cause
Correction
Prevention
For the NX bus of CPU Units
An error that prevents normal NX
bus communications occurred in a
CPU Unit.
Check the error that occurred in
the CPU Unit and perform the
required corrections.
Take preventive measures against
the error that occurred in the CPU
Unit.
An NX Unit is not mounted prop-
erly.
Mount the NX Units and End
Cover securely and secure them
with End Plates.
Mount the NX Units and End
Cover securely and secure them
with End Plates.
The power cable for the Unit
power supply is disconnected, or
the wiring from the Unit power
supply to the NX Units is incorrect.
Wire the Unit power supply to the
NX Units securely.
Wire the Unit power supply to the
NX Units securely.
The power cable for the Unit
power supply is broken.
If the power cable between the
Unit power supply and the NX
Units is broken, replace it.
None
The voltage of the Unit power sup-
ply is outside the specified range,
or the capacity of the Unit power
supply is insufficient.
Configure the power supply sys-
tem configuration correctly
according to the power supply
design method.
Configure the power supply sys-
tem configuration correctly
according to the power supply
design method.
There is a hardware error in an
NX Unit.
If the error persists even after you
make the above correction,
replace the NX Unit.
None
For Communications Coupler Units
An error that prevents normal NX
bus communications occurred in a
Communications Coupler Unit.
Check the error that occurred in
the Communications Coupler Unit
and perform the required correc-
tions.
Take preventive measures against
the error that occurred in the Com-
munications Coupler Unit.
The NX Unit is not mounted prop-
erly.
Mount the NX Units and End
Cover securely and secure them
with End Plates.
Mount the NX Units and End
Cover securely and secure them
with End Plates.
The power cable for the Unit
power supply is disconnected. Or,
the wiring from the Unit power
supply to the NX Units is incorrect.
Correctly wire the Unit power sup-
ply to the NX Units.
Correctly wire the Unit power sup-
ply to the NX Units.
The power cable for the Unit
power supply is broken.
If the power cable between the
Unit power supply and the NX
Units is broken, replace it.
None
The voltage of the Unit power sup-
ply is outside the specified range.
Or, the capacity of the Unit power
supply is insufficient.
Correctly configure the power sup-
ply system according to the power
supply design methods.
Correctly configure the power sup-
ply system according to the power
supply design methods.
There is a hardware error in the
NX Unit.
If the error occurs again even after
you make the above correction,
replace the NX Unit.
None
Attached
information
None
Precautions/
Remarks
None
Summary of Contents for NX-AD series
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