Cpu Unit Status - Omron NJ Series Troubleshooting Manual

 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.
1-1-2

CPU Unit Status

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.
Power Supply 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.
CPU Unit operating status
During startup
RUN mode
During normal
operation
PROGRAM mode
Power Supply Error
CPU Unit Reset
Incorrect Power Sup-
Fatal errors
ply Unit Connected
CPU Unit Watchdog
Timer Error
Major fault
Partial fault
Non-fatal errors
Minor fault
Observation
*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.
NJ-series Troubleshooting Manual (W503)
PWR indicator
Power
Supply
Unit
PWR
(green)
Lit Flashing
(1-s inter-
Lit
Lit
Not lit
*1
*1 Lit
Lit Flashing
(3-s inter-
*1
Lit
*1
*2 Lit
Lit
*2
Lit
*2
*2 Lit
CPU Unit
RUN indicator
ERROR indicator
CPU Unit
User pro-
gram execu-
tion status
RUN ERROR
(green) (red)
Not lit
vals).
Lit Not lit Continues.
Not lit Not lit
Not lit Not lit
Not lit Not lit
Lit
vals).
Not lit Lit
Not lit Lit
Lit Flashing
Continues.
(1-s inter-
vals).
Lit Flashing Continues.
(1-s inter-
vals).
Lit Not lit Continues.
1 Overview of Errors
Software connec-
tion to Sysmac Stu-
dio or NS-series PT
Stops. Not possible.
Possible.
Stops.
Stops. Not possible.
Stops.
Stops.
Stops.
Stops. Possible. (Communi-
cations can be con-
*3
nected from an NS-
series PT if Ether-
Net/IP is operating
normally.)
1
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