9 Troubleshooting and Maintenance
9-6
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
*1 The 7-segment indicator will alternate between the Unit's node address and the code given in the tables in this section.
*2 When a (master function) structure error or verification error occurs, only the most recent error is displayed for each slave.
If the Unit is set to stop the remote I/O communications for a communications error, two errors can be displayed: The
slave's communications error and its most recent error.
Indicators Error
category
Error Likely cause DeviceNet Unit
response
Error
log
(Hex)
MS NS 7-seg-
ment
*1
- - C5 Software
settings
errors
Incorrect
setting
There was an error in the
parameters specified in
the user settings and the
requested settings could
not be made.
• The only response is the
error code displayed on
the 7-segment indicator.
• The error display will be
cleared the next time
that a software switch
operation is completed
normally.
-
- - C6 Multiple
switches
ON
Two or more software
switches were changed to
TRUE simultaneously or a
second software switch
was changed to TRUE
before a prior operation
was completed.
-
-Red
(flashing)
d0 Master
function
Structure
error
*2
(I/O area
duplica-
tion)
The slave's I/O areas over-
lap. (Occurred with the
scan list disabled.)
Note Errors will occur in
the slaves that join
afterwards.
The master will periodi-
cally attempt to reconnect
with the slave with the
structure error.
0343
-Red
(flashing)
d1 Structure
error
*2
(I/O area
range
exceeded)
The slave's I/O area isn't
within the allowed range.
(Occurs with the scan list
disabled.)
0343
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