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9-57
9 Troubleshooting and Maintenance
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
9-4 Even
t L
ogs
9
9-4-3 Error De
scr
iptio
ns
Event name
Remote I/O Communications Error (during Slave Opera-
tion)
Event code
8476 0000 hex
Meaning
An error occurred in remote I/O communications.
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
Outputs will be retained or cleared according to the set-
tings if there are output words.
System-defined
variables
Variable
Data type
Name
None
---
---
Cause and
correction
Assumed cause
Correction
Prevention
The master is not in operation.
Check to see if the master is operat-
ing normally. If it is not, investigate the
cause, and then perform corrective
actions.
Check to make sure the master is
operating normally.
The master and slaves have different
baud rates.
Correct the settings so that the mas-
ter and slaves use the same baud
rate.
Set the master and slaves to the
same baud rate.
Communications cable lengths (trunk
line and branch lines) are unsuitable.
Refer to the communications specifi-
cations and adjust all of the communi-
cations cables to suitable lengths.
Refer to the communications specifi-
cations and adjust all of the cables to
suitable lengths.
A communications cable is discon-
nected or loose.
Connect the communications cable
securely. If the communications cable
is broken, replace it.
Connect the communications cable
securely. Check to see if the commu-
nications cable is operating properly.
The terminating resistance is some-
where other than the ends of the trunk
line.
Connect terminating resistance only
to the ends of the trunk line.
Connect terminating resistance only
to the ends of the trunk line.
Noise
Implement noise countermeasures.
Implement noise countermeasures.
Attached
information
None
Precautions/
Remarks
None
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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