Omron SYSMAC CJ1W-EIP21, Operation Manuals

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13-15
13 Troubleshooting
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
13-2 Usin
g the L
E
D
Ind
icato
rs
and
Displa
y f
o
r T
rou
b
lesh
ooting
13
13-
2-1 Er
ror
s
Occur
ring at the Ether
Net/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 Memory Access
Flash-
ing red --- E9 Memory Access
Error An error occurred in
the Unit's non-vola-
tile memory itself.
This error will occur in
the following cases.
1. An error occurred
while writing the
error log.
2. An error occurred
while writing the
device parame-
ters.
Note This error does
not indicate
checksum
errors detected
when reading
data.
Case 1:
The error record remains
in RAM only. Subsequent
writes to non-volatile
memory are all ignored.
Other than that, normal
operation continues.
(Error records continue to
be written to RAM.)
Case 2:
Tag data links and mes-
sage communications will
continue operating.
*_UnitErr (Unit Error
Occurred), *_UnitMemErr
(Unit Memory Error), and
*_MemErr (Nonvolatile
Memory Error) will
change to TRUE.
0602 Download the Unit
Setup from the tab
pages of the Edit
Parameters Dialog
Box of the Sysmac
Studio and download
the device parame-
ters from the Network
Configurator. If the
error recurs, replace
the EtherNet/IP Unit
or the CPU Unit.
Flash-
ing red --- E8 Device Parame-
ters Error The I/O Area set in
the device parame-
ters does not exist in
the CPU Unit. There is an error in the
parameter settings stored
in the Unit's non-volatile
memory. (An error can
occur when power is
interrupted while data is
being written to non-vola-
tile memory.)
*_UnitErr (Unit Error
Occurred) and
*_CommParamErr
(Invalid Communications
Parameter) will change to
TRUE.
021A Download the Unit
Setup from the tab
pages of the Edit
Parameters Dialog
Box of the Sysmac
Studio and download
the device parame-
ters from the Network
Configurator. If the
error recurs, replace
the EtherNet/IP Unit
or the CPU Unit.
A checksum error or
logic error was
detected in the
parameters.
The Unit was
mounted to a different
PLC (e.g., from NJ to
CJ2) after the Unit
settings were made.