Omron NJ Series Troubleshooting Manual

1 Overview of Errors
1-14
NJ-series Troubleshooting Manual (W503)
 Current Errors
Open the Controller Error Tab Page on the NS-series PT’s Troubleshooter to check the current
error’s event name, event code, level, source, source details, time, details, and attached information
1 to 4. However, for some NX Units, you cannot check the event names, event codes, details, and
attached information for current errors. Also, observations are not displayed as errors.
 Log of Past Errors
Open the Controller Event Log Tab Page on the NS-series PT’s Troubleshooter to check the time,
level, source, event name, event code, details, and attached information 1 to 4 for previous errors.
However, you cannot check the log of previous errors for the Communications Coupler Units, NX
Units, EtherCAT slaves, and CJ-series Units.
Refer to the NS-series Programmable Terminals Programming Manual (Cat. No. V073) for details on
the NS-series PT’s Troubleshooter.
You can determine the error status with the instructions that get error status provided for each function
module from the user program. These instructions get the status and the event code of the error with
the highest level.
For details on the instructions that get error status, refer to the NJ-series Instructions Reference Manual
(Cat. No. W502).
You can check the Error Status variable in the system-defined variables to determine the status of
errors in a Controller. You can read the Error Status variable from an external device by using communi-
cations. Refer to the NJ-series CPU Unit Software User’s Manual (Cat. No. W501) for information on
system-defined variables.
Unless you reset an error, the CPU Unit will retain the error status until you turn OFF the power supply
to the Controller or reset the Controller.
To reset a Controller error, it is necessary to eliminate the cause of the error. The same error will occur
again if you reset the error, but do not eliminate the cause of the error.
Precautions for Safe Use
Always confirm safety at the connected equipment before you reset Controller errors with an
event level of partial fault or higher for the EtherCAT Master Function Module. When the error is
reset, all slaves that were in any state other than Operational state (in which outputs are dis-
abled) due to the Controller error with an event level of partial fault or higher will go to Opera-
tional state and the outputs will be enabled. Before you reset all errors, confirm that no Controller
errors with an event level of partial fault have occurred for the EtherCAT Master Function Module.
Instructions That Read Function Module Error Status
Applicable function module Instruction name Instruction
PLC Function Module Get PLC Controller Error Status GetPLCError
Get I/O Bus Error Status GetCJBError
Motion Control Function Module Get Motion Control Error Status GetMCError
EtherCAT Master Function Mod-
ule
Get EtherCAT Error Status GetECError
EtherNet/IP Function Module Get EtherNet/IP Error Status GetEIPError
Checking with System-defined Variables
1-3-3 Resetting Non-fatal Errors

Omron NJ Series Specifications

General

Brand	Omron
Model	NJ Series
Category	Controller
Language	English