13-11
13 Troubleshooting
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
13-2 Using the LED Indicators and Display for Troubleshooting
13
13-2-1 Errors Occurring at the EtherNet/IP Unit
* The 7-segment display alternates between the node address and error code.
Indicator
Error Cause Unit operation
Error log
(hex)
Countermeasure
MS NS
7-seg-
ment*
Errors Related to CPU Unit Data Exchange
Flash-
ing red
--- HA CPU Unit mem-
ory error
A parity error
occurred during an
operation such as
reading the routing
tables.
Records the error in the
error log. If the routing
tables were being read,
the routing tables are
treated as missing.
0012 Register the routing
tables in the CPU
Unit again and restart
the CPU Unit.
Replace the CPU
Unit if the error
recurs.
A memory error has
occurred for the tag
database in the CPU
Unit
• If a variable (tag name)
is specified in the tag
data link or Unit Status
Area, refreshing the
user-specified status
area is stopped and tag
data links will operate
as follows:
• Tag data link communi-
cations will be stopped
for originator connec-
tions.
• Communications will
continue for target con-
nection. If the Unit is
the target of the tag
data link connection
and the Controller sta-
tus is included in the
communications data,
the corresponding ele-
ment in the Target
Node PLC Error Flags
will change to TRUE.
Note Recovery is possi-
ble from this error.
If recovery is
achieved, the tag
data links will be
restarted to return
to normal status.
0017 Download the tag
data to the CPU Unit
again.
Replace the CPU
Unit if the error
recurs.
Flash-
ing red
Not lit Hb CPU Unit event
servicing timeout
A timeout occurred
during an operation
such as reading the
routing tables to the
CPU Unit.
Operation stops. 0011 Replace the Ether-
Net/IP Unit or the
CPU Unit if the error
recurs when the Unit
is restarted.
Flash-
ing red
--- HC Routing table
error
There is a logic error
in the routing table
settings.
The Unit continues oper-
ating without the routing
tables.
021A Create the routing
tables again.
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