Omron NJ Series Troubleshooting Manual

1-3
1 Overview of Errors
NJ-series Troubleshooting Manual (W503)
1-1 Overview of NJ-series Errors
1
1-1-2 CPU Unit Status
 Non-fatal Errors
These errors are detected and managed with the event management function of the NJ-series Con-
troller. You can confirm these errors with the Sysmac Studio or an NS-series PT.
Refer to 1-3 Non-fatal Errors for error types and confirmation methods for non-fatal errors.
You can check the operating status of the CPU Unit with the PWR, RUN, and ERROR indicators on the
front panels of the Power Supply Unit and CPU Unit.
The following table shows the status of the front-panel indicators, the status of user program execution,
and the ability to make a software connection to the Sysmac Studio or an NS-series PT during startup,
during normal operation, and when there are errors in the Controller.
*1 Refer to 1-2 Fatal Errors for information on individual errors.
*2 Refer to 1-3 Non-fatal Errors for information on individual errors.
*3 The function module where the error occurred stops.
1-1-2 CPU Unit Status
CPU Unit operating status
Power
Supply
Unit
CPU Unit
User pro-
gram execu-
tion status
Software connec-
tion to Sysmac Stu-
dio or NS-series PT
PWR
(green)
RUN
(green)
ERROR
(red)
During startup
Lit Flashing
(1-s inter-
vals).
Not lit Stops. Not possible.
During normal
operation
RUN mode Lit Lit Not lit Continues. Possible.
PROGRAM mode Lit Not lit Not lit Stops.
Fatal errors
Power Supply Error
*1
Not lit Not lit Not lit Stops. Not possible.
CPU Unit Reset
*1
Lit Not lit Not lit Stops.
Incorrect Power Sup-
ply Unit Connected
*1
Lit Flashing
(3-s inter-
vals).
Lit Stops.
CPU Unit Watchdog
Timer Error
*1
Lit Not lit Lit Stops.
Non-fatal errors
Major fault
*2
Lit Not lit Lit Stops. Possible. (Communi-
cations can be con-
nected from an NS-
series PT if Ether-
Net/IP is operating
normally.)
Partial fault
*2
Lit Lit Flashing
(1-s inter-
vals).
Continues.
*3
Minor fault
*2
Lit Lit Flashing
(1-s inter-
vals).
Continues.
Observation
*2
Lit Lit Not lit Continues.
PWR indicator
RUN indicator
ERROR indicator
Power Supply Unit CPU Unit

Omron NJ Series Specifications

General

Brand	Omron
Model	NJ Series
Category	Controller
Language	English