Omron NJ Series Troubleshooting Manual

2 Error Troubleshooting Methods
2-2
NJ-series Troubleshooting Manual (W503)
2-1 Troubleshooting Flowcharts
This section provides basic error identification and troubleshooting flowcharts. Use them when an error
occurs in the NJ-series Controller.
When an error occurs in the NJ-series Controller, use the following flowchart to determine whether the
error is a fatal error or a non-fatal error.
Whenever possible, set the Sysmac Studio’s software connection method in the flowchart to a direct
USB connection. If you use Ethernet, there are many reasons that prevent a software connection from
the Sysmac Studio, so time is required to determine if a fatal or non-fatal error has occurred. If you can-
not go online from the Sysmac Studio, perform 2-4 Troubleshooting When You Cannot Go Online from
the Sysmac Studio before you assume that the error is a fatal error.
2-1-1 Checking to See If the CPU Unit Is Operating
Flashing.
Not possible.
Not
possible.
Error occurs.
RUN indicator (green)?
Not lit.
Lit.
Lit.
Not lit.
Not lit.
Power Supply Error
CPU Unit Reset
CPU Unit Watchdog Timer Error
Incorrect Power Supply Unit Connected
A
Possible.
Possible.
PWR indicator
(green)?
ERROR indicator
(red)?
Going online from the
Sysmac Studio?
Going online from the
Sysmac Studio?
A fatal error occurred. Refer to 2-2
Troubleshooting Fatal Errors.
A non-fatal error occurred. Refer to 2-1-2
Troubleshooting Flowchart for Non-fatal
Errors.

Omron NJ Series Specifications

General

Brand	Omron
Model	NJ Series
Category	Controller
Language	English