Omron NJ Series Troubleshooting Manual

2 Error Troubleshooting Methods
2-14
NJ-series Troubleshooting Manual (W503)
2-4 Troubleshooting When You Cannot
Go Online from the Sysmac Studio
The section describes the procedure to troubleshoot when you cannot go online with the CPU Unit from
the Sysmac Studio.
The following table lists the possible causes when you cannot go online with the NJ-series CPU Unit
from the Sysmac Studio.
Note If the EtherNet/IP NET ERR indicator on the CPU Unit is lit or flashing, it is possible that you cannot go online
through an EtherNet/IP route because of an error in the EtherNet/IP Function Module. See if you can go
online with a direct USB connection.
You can use the status of the RUN indicator on the CPU Unit to isolate the cause. Implement the trou-
bleshooting for the applicable cause.
2-4-1 Causes and Correction When You Cannot Go Online from the
Sysmac Studio
Cause Description Correction
Incorrect settings or
faulty communica-
tions path
There is a mistake in
the settings that the
Sysmac Studio uses
to go online with the
CPU Unit. Or, the
communications path
is faulty.
Refer to Troubleshooting Incorrect Settings and Faulty Communi-
cations Path on page 2-15.
Fatal error in the CPU
Unit
A fatal error occurred
in the CPU Unit.
Refer to 2-1-1 Checking to See If the CPU Unit Is Operating.
High system service
load
The system service
load on the CPU Unit
is too high and time
cannot be obtained to
connect with the Sys-
mac Studio.
Start in Safe Mode. Refer to Troubleshooting a High System Ser-
vice Load on page 2-19.
RUN indicator
Causes
Incorrect settings or
faulty communications
path
Fatal error in the CPU
Unit
High system service
load
No lit. Cause Cause ---
Flashing at 3-s intervals. --- Cause (Incorrect Power
Supply Unit connected.)
---
Lit. Cause --- Cause

Omron NJ Series Specifications

General

Brand	Omron
Model	NJ Series
Category	Controller
Language	English