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9 Troubleshooting and Maintenance
9-14
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
The NS indicator will flash red if the error occurs during remote I/O communications, otherwise the indicator will be OFF.
Indicators
Error
category
Error
Likely cause
DeviceNet Unit
response
Error
log
(Hex)
MS
NS
7-seg-
ment
*1
-
OFF or
Red
(flashing)
*2
E2
Network
Transmis-
sion time-
out error
A transmission request
was not completed nor-
mally for one of the follow-
ing reasons:
•
There is not even one
device such as a slave in
the network.
•
The communications
speed settings are not
the same in all of the
nodes.
•
CAN controller error
As long as transmission
timeout is in effect, remote
I/O communications will
remain stopped and errors
will be returned in
response to requests for
message transmissions.
The indicator status, scan-
ning, and message pro-
cessing will return to
normal when the transmis-
sion timeout returns to nor-
mal, although scanning will
not resume if the
DeviceNet Unit is set to
stop remote I/O communi-
cations when a communi-
cations error occurs.
0342
Red
(flashing)
-
E6
Memory
access
Message
monitoring
timer list
logic error
There is an error in the
contents of the message
monitoring timer list stored
in non-volatile memory.
Records the error in the
error log.
Operation will continue
using the default message
monitoring timer values.
021A
Red
(flashing)
-
E7
Slave scan
list logic
error
There is an error in the
contents of the slave scan
list stored in non-volatile
memory.
•
Records the error in the
error log.
•
The slave remote I/O
communications will be
stopped.
•
Message processing
and the exchange of
data with the CPU Unit
will continue. Normal
operation will resume
when the slave scan list
is written normally. (Start
the slave remote I/O
communications.)
021A
Summary of Contents for CJ1W-DRM21
Page 12: ...Manual Structure 10 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 ...
Page 42: ...Revision History 40 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 ...
Page 345: ...Index 1 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 I Index ...
Page 349: ......