Omron Sysmac NJ-series

15-3
15 Troubleshooting
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
15-1 Overview of Errors
15
15-1-1 How to Check for Errors
You can check to see if an error has occurred with the following methods.
* To perform troubleshooting from an HMI, connect the HMI to the built-in EtherNet/IP port on the CPU Unit. Refer
to the appendices of the NJ/NX-series Troubleshooting Manual (Cat. No. W503) for the applicable range of the
HMI Troubleshooter.
This section describes the above checking methods.
 CPU Unit Operating Status
You can use the PWR/POWER, RUN, and ERROR indicators to determine the level of an error.
The following table shows the relationship between the CPU Unit indicators and the event level for
an NX-series CPU Unit.
15-1-1 How to Check for Errors
Checking method What you can check
Checking the indicators You can check the error status of the CPU Unit and EtherNet/IP port.
Checking with the trouble-
shooting function of Sysmac
Studio
You can check for current Controller errors, a log of past Controller errors, error
sources, error causes, and corrections.
Checking with the Trouble-
shooter of an HMI*
You can check for current Controller errors, a log of past Controller errors, error
sources, error causes, and corrections.
Checking with instructions that
read function module error sta-
tus
You can check the highest-level status and highest-level event code in the cur-
rent Controller errors.
Checking with system-defined
variables
You can check the current Controller error status for each function module.
Checking communications sta-
tus with the Network Configura-
tor
You can check the communications status (e.g., tag data link connection status)
for each device on the EtherNet/IP network.
Checking the Indicators
Indicators
CPU Unit operating status
Error confirmation with the Sysmac Stu-
dio or an HMI
PWR/
POWER
RUN ERROR
Not lit Not lit Not lit Power Supply Error Not possible:
Refer to the NJ/NX-series Troubleshooting
Manual (Cat. No. W503).
Lit Not lit Not lit
CPU Unit Reset
*1, *2
/Hard-
ware Initialization Error
*3, *2
Lit Not lit or
flashing
Lit
CPU Unit Error
*4
Lit Flashing for
30 s or longer
Not lit System Initialization Error
Lit Not lit Lit
Major fault level
*4
Possible:
Connect the Sysmac Studio or an HMI and
check the cause of and correction for the
error in the troubleshooting functions of the
Sysmac Studio or the Troubleshooter of
the HMI.
Lit Lit Flashing Partial fault level
Lit Lit Flashing Minor fault level
Lit Lit Not lit Observation
Lit Lit Not lit Normal operation in RUN
mode
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Lit Not lit Not lit Normal operation in PRO-
GRAM mode
*2
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