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9 Troubleshooting and Maintenance
9-58
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Event name
Slave COS Send Failed
Event code
8477 0000 hex
Meaning
An attempt was made to send COS data to the master using the Slave COS Send Switch (software switch 2, device
variable *_
Sw2SlavCOSSendCmd
), but the send failed.
Source
PLC Function Module
Source details
CJ-series Unit
Detection
timing
During DeviceNet
communications
Error attributes
Level
Minor fault
Recovery
Error reset
Log category
System
Effects
User program
Continues.
Operation
COS transmissions are not possible.
System-defined
variables
Variable
Data type
Name
None
---
---
Cause and
correction
Assumed cause
Correction
Prevention
A COS connection to the master is
not open.
Open a COS connection to the mas-
ter.
When you perform COS communica-
tions, open a COS connection
between the master and slave.
A Bus Off state occurred.
Remove the cause of the Bus Off
error.
Take measures to prevent the errors
from occurring again.
A network power error occurred.
Remove the cause of the power sup-
ply error.
A send timeout occurred.
Remove the cause of the send time-
out.
Attached
information
None
Precautions/
Remarks
None
Event name
File Read/Write Error
Event code
048A 0000 hex
Meaning
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.
Source
PLC Function Module
Source details
CJ-series Unit
Detection
timing
When SD Mem-
ory Card backup
is executed
Error attributes
Level
Observation
Recovery
---
Log category
System
Effects
User program
Continues.
Operation
Not affected.
System-defined
variables
Variable
Data type
Name
None
---
---
Cause and
correction
Assumed cause
Correction
Prevention
The available capacity on the SD
Memory Card was insufficient to write
a file.
Replace the SD Memory Card for one
with sufficient available capacity. Or,
delete unnecessary files from the SD
Memory Card.
Use an SD Memory Card with suffi-
cient available capacity when you
save files to it.
Write-protection is set on the SD
Memory Card when you write to a file.
Remove write-protection from the SD
Memory Card.
Disable write-protection on the SD
Memory Card before you save the file
to the SD Memory Card.
Noise
Implement noise countermeasures.
Implement noise countermeasures.
The SD Memory Card is damaged.
Replace the SD Memory Card.
None
The CPU Unit has failed.
Replace the CPU Unit.
None
Attached
information
None
Precautions/
Remarks
You can change the event level to the minor fault level. If you change the level to the minor fault level, the
Recovery
col-
umn above will be changed to “Error reset.”
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 ...
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