Omron CJ1W-EIP21 Operation Manuals page 333

Indicator
7-seg-
MS NS
ment*
Errors Related to Memory Access
Flash- --- E9
ing red
Flash- --- E8
ing red
* The 7-segment display alternates between the node address and error code.
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
Error Cause
Memory Access An error occurred in
Error 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.
Device Parame- The I/O Area set in
ters Error the device parame-
ters does not exist in
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.
13 Troubleshooting
Error log
Unit operation
(hex)
Case 1: 0602
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.
There is an error in the 021A
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.
Countermeasure
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.
Download the Unit
Setup from the tab
pages of the Edit
Parameters Dialog
13
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.
13-15