1 Overview of Errors
1-8
NJ-series Troubleshooting Manual (W503)
*1 If multiple Controller errors have occurred, the indicators show the error with the highest event level.
*2 Operation stops in the function module (Motion Control Function Module, EtherCAT Master Function Module,
or EtherNet/IP Function Module) in which the error occurred.
NJ-
series
CPU
Unit
opera-
tion
RUN out-
put on
Power
Supply
Unit
OFF ON ON ON ON
User pro-
gram
execu-
tion sta-
tus
Stops.
Continues.
*2
Continues. Continues. Continues.
Outputs
turned
OFF
Ye s N o N o N o N o
Error
reset
Not possible. Depends on
the nature of
the error.
Depends on
the nature of
the error.
--- ---
Event
logs
Recorded.
(Some errors
are not
recorded.)
Recorded. Recorded. Recorded. Recorded.
Outputs from
EtherCAT slaves
and Basic Output
Units
Refer to I/O
Operation for
Major Fault
Level Control-
ler Errors on
page 1-9.
• Errors in
EtherCAT
Master Func-
tion Module:
Depends on
settings in
the slave.
• Errors in
other func-
tion modules:
According to
user pro-
gram.
According to
user program.
According to
user program.
According to
user program.
Sysmac Studio dis-
play (when online)
Error messages are automatically displayed in the
Controller Status Pane.
The user can display detailed information in the
Troubleshooting Dialog Box.
These errors and events are not
shown on the display of Control-
ler errors.
Event level
Item
Controller errors
Controller
information
Major fault
level
Partial fault
level
Minor fault
level
Observation Information
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