Omron SYSMAC CJ1W-EIP21, Operation Manuals

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13 Troubleshooting
13-36
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
Event name Unit Memory Error (Device Error) Event code 047A 0000 hex
Meaning An error occurred when writing to the error history or device parameters in non-volatile memory in the EtherNet/IP Unit.
Source PLC Function Module Source details CJ-series Unit Detection
timing At power ON,
Controller reset,
or Unit restart
Error attributes Level Minor fault Recovery Error reset Log category System
Effects User program Continues. Operation The following operations will be performed depending on
the type of error in the non-volatile memory. (You can
check the error history in the EtherNet/IP Unit and the CIO
Area status.)
02 hex (network parameters): Tag data links stop.
06 hex (error history): The error history is not saved in
non-volatile memory.
09 hex (identity information): EtherNet/IP communications
stop.
0E hex (Unit name): No affect on other communications.
0F hex (basic Ethernet settings): Communications are not
possible.
10 hex (advanced Ethernet settings): The relevant func-
tion stops.
11 hex (MAC address): Ethernet communications stop.
12 hex (status area layout settings): Operation is per-
formed using default layout settings.
14 hex (Tag address resolve memory write error): Tag
data link communications stops.
System-defined
variables Variable Data type Name
None --- ---
Cause and
correction Assumed cause Correction Prevention
There is a source of noise nearby. If device parameter writing fails,
download the device parameters
using the Network Configurator.
Then, if the error persists even after
cycling the power supply or restarting
the EtherNet/IP Unit, check for ambi-
ent noise. If there is a noise source,
remove it. Use the Unit away from sources of
noise. Implement noise countermea-
sures.
Non-volatile memory failure If the error occurs even after perform-
ing the actions described above,
replace the EtherNet/IP Unit. None
Attached
information None
Precautions/
Remarks None