Omron NJ Series Troubleshooting Manual

1 Overview of Errors
1-12
NJ-series Troubleshooting Manual (W503)
For descriptions of the error codes for the Motion Control Function Module or basic instructions,
refer to the descriptions of the corresponding event codes. Refer to the NJ-series CPU Unit
Motion Control User’s Manual (Cat. No. W507) and NJ-series Motion Control Instructions Refer-
ence Manual (Cat. No. W508) for error information on the Motion Control Function Module, and to
the NJ-series Instructions Reference Manual (Cat. No. W502) for error information on basic
instructions. For error information on a CJ-series Special Unit, refer to the manual for the relevant
Unit. For the corresponding event codes, refer to the descriptions of the error codes.
 Exporting the Error Log
You can use the Sysmac Studio or an NS-series PT to export the displayed event log to a CSV file.
Refer to the NJ-series CPU Unit Software User’s Manual (Cat. No. W501) for information on export-
ing event logs
Use the following methods to check for non-fatal errors.
*1 Detailed information, such as error causes and corrections, is not displayed.
*2 To perform troubleshooting from an NS-series PT, connect the PT to the built-in EtherNet/IP port on the CPU
Unit.
This section describes the above checking methods.
 Checking the Level of a Controller Error
You can use the PWR indicator on the Power Supply Unit and the RUN and ERROR indicators on
the CPU Unit to determine the level of an error. The following table shows the relationship between
the Controller’s indicators and the event level.
_MC_AX[0..63].Obsr.Code Axis Observation Code
_MC_GRP[0..31].MFaultLvl.Code Axes Group Minor Fault Code
_MC_GRP[0..31].Obsr.Code Axes Group Observation Code
1-3-2 Checking for Non-fatal Errors
Checking Methods
Checking method What you can check
Checking the indicators You can use the indicators to confirm the Controller error level, the error
status of the EtherCAT Master Function Module, and the error status of
the EtherNet/IP Function Module.
Checking with the Troubleshooting
Function of Sysmac Studio
You can check for current Controller errors, a log of past Controller errors,
error sources, error causes, and corrections. You can also check error
logs from CJ-series Special Units.
*1
Checking with the Troubleshooter of
an NS-series PT
*2
You can check for current Controller errors, a log of past Controller errors,
error sources, error causes, and corrections.
Instructions that read function mod-
ule error status
You can check the highest-level status and highest-level event code in the
current Controller errors.
Checking with system-defined vari-
ables
You can check the current Controller error status for each function mod-
ule.
Checking the Indicators
Indicators
Event level
PWR (green) RUN (green) ERROR (red)
Lit Not lit Lit Major fault level
Lit Lit Flashing
(1-s intervals).
Partial fault level
Minor fault level
Variable Name

Omron NJ Series Specifications

General

Brand	Omron
Model	NJ Series
Category	Controller
Language	English