Omron CJ1W-DRM21, Operation Manual

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9 Troubleshooting and Maintenance
9-4
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 most common causes of Unit status errors during settings switch operations are listed below:
• The master was stopped and a software switch operation relating to the master function was performed. (This does not
include the master enable switch operation.)
• The scan list was enabled and a software switch operation was performed that can only be performed while the scan list
is disabled. (Scan list enable and fixed allocation setting operations)
• The scan list was disabled and a software switch operation was performed that can only be performed while the scan
list is enabled. (Clear scan list and Backup Unit settings file operations)
• The slave was stopped and a software switch operation relating to the slave function was performed. (This does not
include the slave enable switch operation.)
9-1-2 Troubleshooting Errors Occurring in the DeviceNet Unit
Indicators Error
category
Error Likely cause DeviceNet Unit
response
Error
log
(Hex)
MS NS 7-seg-
ment
*1
- - A0 Master
function Remote
I/O com-
munica-
tions
stopped by
a commu-
nications
error Pin 3 on the master's DIP
switch is set to stop com-
munications in the event of
a communications error
and communications have
been stopped due to a
remote I/O communica-
tions error, network power
supply error, or transmis-
sion timeout. • Remote I/O communica-
tions as a master will
stop. Remote I/O com-
munications as a slave
and message communi-
cations will continue.
• Records the error in the
error log.
0346
- - C0 Software
settings
errors CPU Unit
status error The software switch opera-
tion couldn't be performed
because the CPU Unit
wasn't in PROGRAM
mode. • The only response is the
error code displayed on
the 7-segment indicator.
• The error display will be
cleared the next time
that a software switch
operation is completed
normally.
-
- - C2 Unit status
error The software switch opera-
tion failed because the
Unit could not perform the
requested process in its
current status.
*2
-
- - C4 Structure
error The software switch opera-
tion failed because a struc-
ture error occurred. -