Omron Sysmac NJ-series User Manual page 442

15 Troubleshooting
Indicators
PWR/
RUN
POWER
Lit Flashing
*1 This error can occur for NX701 CPU Units. If the status of indicators shown above continues 30 seconds or
longer, this error exists.
*2 If you can connect communications to the CPU Unit from the Sysmac Studio with a direct USB connection, the
CPU Unit is in PROGRAM mode. If you cannot connect communications, a CPU Unit Reset or Hardware Ini-
tialization Error has occurred.
*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 If you can connect communications to the CPU Unit from the Sysmac Studio with a direct USB connection, a
major fault level error has occurred. If you cannot connect communications, a CPU Unit Error has occurred.
*5 If you cannot connect communications to the CPU Unit from the Sysmac Studio, it is also possible that the
USB cable is faulty or that the network type on the Sysmac Studio is not set for a direct USB connection. Refer
to the NJ/NX-series Troubleshooting Manual (Cat. No. W503) if you cannot connect communications to the
CPU Unit.
The following table shows the relationship between the CPU Unit indicators and the event level for
an NJ-series CPU Unit.
Indicators
PWR RUN
Not lit Not lit
Lit Not lit
Lit Flashing
Lit Not lit
Lit Not lit
Lit Lit
Lit Lit
Lit Lit
Lit Lit
Lit Not lit
Lit Flashing
*1 If you can connect communications to the CPU Unit from the Sysmac Studio with a direct USB connection, the
CPU Unit is in PROGRAM mode. If you cannot connect communications, the CPU Unit is being reset.
*2 If you can connect communications to the CPU Unit from the Sysmac Studio with a direct USB connection, a
major fault level error has occurred. If you cannot connect communications, a watchdog timer error has
occurred in the CPU Unit.
*3 If you cannot connect communications to the CPU Unit from the Sysmac Studio, it is also possible that the
USB cable is faulty or that the network type on the Sysmac Studio is not set for a direct USB connection. Refer
to the NJ/NX-series Troubleshooting Manual (Cat. No. W503) if you cannot connect communications to the
CPU Unit.
 EtherNet/IP Port Error Status
If the EtherNet/IP NET ERR indicator is also lit in addition to the PWR/POWER, RUN, and ERROR
indicators, then an error in the minor fault level or a higher level has occurred in the EtherNet/IP
port. The indicator lets you check the status given in the following table.
15-4
CPU Unit operating status
ERROR
Not lit Normal operation in startup
state
*5
CPU Unit operating status
ERROR
Not lit Power Supply Error
Not lit *1
CPU Unit Reset
Lit Incorrect Power Supply Unit Connected
Lit
CPU Unit Watchdog Timer Error
Lit *2
Major fault level
Flashing Partial fault level
Flashing Minor fault level
Not lit Observation
Not lit Normal operation in RUN mode
Not lit
Normal operation in PROGRAM mode
Not lit Normal operation in startup state
*3
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)
Error confirmation with the Sysmac Stu-
dio or an HMI
---
Error confirmation with the Sys-
mac Studio or an HMI
Not possible: Refer to the NJ/NX-
series Troubleshooting Manual
(Cat. No. W503).
*2
Possible: Connect the Sysmac Stu-
dio or an HMI and check the cause
of and correction for the error in the
troubleshooting functions of the
Sysmac Studio or the Trouble-
shooter of the HMI.
---
*1 ---
---
*5
*3