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9 Troubleshooting and Maintenance
9-40
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
8474 0000 hex
Bus Off
Detected
A Bus Off error
occurred (i.e., com-
munications
stopped because
there were too
many communica-
tions errors).
•
The master and slave have dif-
ferent baud rates.
•
Communications cable lengths
(trunk line and branch lines) are
unsuitable.
•
A communications cable is dis-
connected or loose.
•
The terminating resistance is
somewhere other than the ends
of the trunk line.
•
Noise
S
8475 0000 hex
Remote I/O
Communica-
tions Error
A timeout occurred
in remote I/O com-
munications.
•
The master and slaves have dif-
ferent baud rates.
•
Communications cable lengths
(trunk line and branch lines) are
unsuitable.
•
A communications cable is dis-
connected or loose.
•
The terminating resistance is
somewhere other than the ends
of the trunk line.
•
Noise
S
U
8476 0000 hex
Remote I/O
Communica-
tions Error
(during Slave
Operation)
An error occurred in
remote I/O commu-
nications.
•
The master is not in operation.
•
The master and slaves have dif-
ferent baud rates.
•
Communications cable lengths
(trunk line and branch lines) are
unsuitable.
•
A communications cable is dis-
connected or loose.
•
The terminating resistance is
somewhere other than the ends
of the trunk line.
•
Noise
S
8477 0000 hex
Slave COS
Send Failed
An attempt was
made to send COS
data to the master
using the Slave
COS Send Switch
(software switch 2,
device variable
*_
Sw2SlavCOSSen
dCmd
), but the
send failed.
•
A COS connection to the mas-
ter is not open.
•
A Bus Off state occurred.
•
A network power error
occurred.
•
A send timeout occurred.
S
048A 0000 hex
File
Read/Write
Error
An error occurred
when user setup
data was read from
an SD Memory
Card in the CPU
Unit or when data
was written as a file
to an SD Memory
Card.
•
The available capacity on the
SD Memory Card was insuffi-
cient to write a file.
•
Write-protection is set on the
SD Memory Card when you
write to a file.
•
Noise
•
The SD Memory Card is dam-
aged.
•
The CPU Unit has failed.
U
S
148C 0000 hex
Invalid Mes-
sage Timer
List Error
The data in the
message monitor-
ing timer list is not
correct.
•
The power supply was inter-
rupted while writing the mes-
sage-monitoring timer list to the
non-volatile memory.
U
S
Event code
Event name
Meaning
Assumed cause
Level
Reference
Maj
Prt
Min
Obs
Info
Содержание CJ1W-DRM21
Страница 12: ...Manual Structure 10 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 ...
Страница 42: ...Revision History 40 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 ...
Страница 214: ...6 Message Communications 6 26 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 ...
Страница 345: ...Index 1 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 I Index ...
Страница 349: ......