Omron NX701-17 Series Troubleshooting Manual page 33

The following table shows the status of front-panel indicators, the status of user program execution, and
the ability to connect communications to the Sysmac Studio or an HMI during startup, during normal
operation, and when errors occur.
CPU Unit operating status
Startup
RUN mode
Normal
operation
PROGRAM mode
Power Supply
*1
Error
CPU Unit Reset
/Hardware Initial-
ization Error
Fatal error in
CPU Unit
CPU Unit Error
System Initializa-
tion Error
Major fault
Partial fault
Non-fatal error
in CPU Unit
Minor fault
Observation
*1 Refer to 1-2 Fatal Errors for information on individual errors.
*2 This error can occur for NX701 CPU Units. If the status of indicators shown above continues 30 seconds or longer, this
error exists.
*3 This error can occur for NX1P2 CPU Units. If the status of indicators shown above continues 30 seconds or longer, this
error exists.
*4 Refer to 1-3 Non-fatal Errors for information on individual errors.
*5 The function module where the error occurred stops.
Precautions for Correct Use Precautions for Correct Use
When an NX1P2 CPU Unit is used, a power shortage may occur at the CPU Rack depending on
the configuration of NX Units mounted to the CPU Unit. If one of the followings occurs, use the
Sysmac Studio to check if the power consumed by the Units on the CPU Rack exceeds the sup-
plied power.
• The CPU Unit is operating but the mounted NX Units do not operate.
• Power is supplied to the CPU Unit, but the CPU Unit does not turn ON.
NJ/NX-series Troubleshooting Manual (W503)
Power
Supply
Unit/
CPU Unit
PWR/
POWER RUN (green)
(green)
Lit Flashing
(2-s intervals
followed by
0.5-s inter-
vals)
Lit Lit
Lit Not lit
Not lit Not lit
*1*2 Lit Not lit
*1*3
Lit Not lit or
Flashing (2-s
*1
intervals or
0.5-s inter-
vals)
Lit Flashing
(2-s intervals)
*1
for 30 s or lon-
ger
*4 Lit Not lit
Lit Lit
*4
Lit Lit
*4
*4 Lit Lit
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.
Not lit Stopped.
Lit Stopped.
Flashing
Continues.
(1-s intervals)
Flashing Continues.
(1-s intervals)
Not lit Continues.
1 Overview of Errors
Communications
with Sysmac Stu-
dio or HMI
Not possible.
Possible.
Not possible.
Possible. (Commu-
nications can be
*5
connected from an
HMI if EtherNet/IP
is operating nor-
mally.)
1-5
1