6 Troubleshooting
6 - 18
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
44440000 hex NX Bus
Function Pro-
cessing Error
A fatal error was
detected in the NX
Bus Function Mod-
ule.
• An error occurred in the soft-
ware.
S page 6-54
85540000 hex NX Bus I/O
Communica-
tions Stopped
Due to
Another
Event
The I/O communi-
cations on the NX
bus were stopped
based on the Fail-
soft Operation Set-
ting because an
error that triggers
fail-soft operation
occurred.
• I/O refreshing was stopped
based on the Fail-soft Opera-
tion Setting.
S page 6-55
35920000 hex Registered
NX Unit Not
Mounted
There is no
mounted NX Unit
that exists in the
Unit configuration
information regis-
tered in the CPU
Unit.
If there are more
than one NX Unit
relevant to this
event, only the NX
Unit that is nearest
to the CPU Unit is
registered with the
event.
• There is no mounted NX Unit
that exists in the Unit configura-
tion information registered in
the CPU Unit.
• The power supply to the Addi-
tional NX Unit Power Supply
Unit is not turned ON.
S page 6-55
85500000 hex NX Bus Com-
munications
Error
A communications
error that prevents
normal NX bus
communications
was detected.
If there are more
than one NX Unit
relevant to this
event, only the NX
Unit that is nearest
to the CPU Unit is
registered with the
event.
• The NX bus connector contact
is faulty due to vibration or
shock.
• Excessive noise is applied to
the NX bus connector.
• An NX Unit was removed.
• An error occurred in an NX
Unit.
S page 6-56
85510000 hex NX Unit
Communica-
tions Timeout
An error occurred in
I/O data communi-
cations with the NX
Units.
• An NX Bus Communications
Error has occurred.
• An error occurred in an NX
Unit.
S page 6-56
85520000 hex NX Unit Ini-
tialization
Error
Initializing an NX
Unit failed.
• Initialization with the Unit con-
figuration information regis-
tered in the CPU Unit failed.
• An NX Bus Communications
Error has occurred.
• The Channel Enable/Disable
Setting for all channels of the
Analog Unit are set to Disable.
• Initialization of an NX Unit
failed.
S page 6-57
85530000 hex NX Unit
Startup Error
Starting an NX Unit
failed.
• A startup error occurred in an
NX Unit.
S page 6-57
103C0000 hex NX Unit
Backup
Failed
The backup opera-
tion for an NX Unit
en
ded in an error
.
• There is also another error
related to the NX Bus Function
Module.
• An NX Bus Communications
Error has occurred.
• Backup data cannot be
received from an NX Unit.
S page 6-58
Event code Event name Meaning Assumed cause
Level
Reference
Maj Prt Min Obs Info
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