Omron NJ501-1 Series User Manual page 79

Indicator
SD PWR Green
SD BUSY Yellow
Precautions for Safe Use
• Do not turn OFF the power supply to the Controller while the BUSY indicator flashes. While
the BUSY indicator is lit, the user program and settings in the CPU Unit are being backed up in
the built-in non-volatile memory. The data will not be backed up if the power supply is turned
OFF. The next time that the Controller is started, a Controller error in the major fault level will
occur and operation will stop.
• Do not turn OFF the power supply or remove the SD Memory Card while SD Memory Card
access is in progress (i.e., while the SD BUSY indicator flashes). Data may become corrupted,
and the Controller will not operate correctly if it uses corrupted data. To remove an SD Memory
Card from the CPU Unit when power is supplied to the CPU Unit, press the SD Memory Card
power supply switch and wait for the SD PWR indicator to turn OFF before you remove the SC
Memory Card.
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. You can check the operating status of the
CPU Unit from the status of front-panel indicators, the status of user program execution, and the
ability to connect communications from the Sysmac Studio or NS-series PTs during startup, during
normal operation, and when errors occur.
CPU Unit operating status
Startup
RUN mode
Normal opera-
tion
PROGRAM mode
Power Supply
*1
Error
CPU Unit Reset
Fatal error in
Incorrect Power
CPU Unit
Supply Unit Con-
*1
nected
CPU Unit Watch-
dog Timer Error
Major fault
Partial fault
Non-fatal error
in CPU Unit
Minor fault
Observation
NJ-series CPU Unit Hardware User's Manual (W500)
Color Status
Lit Power is being supplied to the SD Memory Card and the SD
Memory Card can be used.
Flashing ---
Not lit The power supply for the SD Memory Card is stopped, an SD
Memory Card is not mounted, or the file format of the mounted
SD Memory Card is not supported.
Lit SD Memory Card access in progress.
Not lit SD Memory Card access not in progress
Power
Supply
Unit
PWR
RUN (green)
(green)
Lit Flashing
(1-s intervals)
Lit Lit
Lit Not lit
Not lit Not lit
*1 Lit Not lit
Lit Flashing
(3-s intervals)
Lit Not lit
*1
*2 Lit Not lit
Lit Lit
*2
Lit Lit
*2
*2 Lit Lit
3 Configuration Units
Meaning
CPU Unit
User pro-
gram execu-
tion status
ERROR (red)
Not lit Stopped.
Not lit Continues.
Not lit Stopped.
Not lit Stopped.
Not lit Stopped.
Lit Stopped.
Lit Stopped.
Lit Stopped.
Flashing
Continues.
(1-s intervals)
Flashing Continues.
(1-s intervals)
Not lit Continues.
Communications
with Sysmac Stu-
dio or NS-series
PT
Not possible.
Possible.
Not possible.
Possible. (Commu-
nications can be
*3
connected from an
NS-series PT if Eth-
erNet/IP is operat-
ing normally.)
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