Omron NJ301-1100 - User Manual

Other manuals for Omron NJ301-1100

Quick Start Guide12 pages

Troubleshooting Manual208 pages

Questions and Answers

B
Brendan WebbAug 20, 2025
How to fix Omron Control Unit when none of the inputs turn ON and the operation indicators do not light?
- E
  ehensonAug 20, 2025
  If none of the inputs on your Omron Control Unit are turning ON and the operation indicators are not lit, check the following: * Ensure that the external input power is supplied. * Verify that the external input power supply voltage is within the specified rating. * Tighten any loose screws on the terminal block. * If there is still no improvement, replace the terminal block or connector if there is faulty contact.
C
Carlos OliverAug 22, 2025
What to do if none of the outputs turn ON on my Omron Control Unit?
- C
  Curtis ChambersAug 22, 2025
  If none of the outputs on your Omron Control Unit are turning ON, check these potential causes: 1. Ensure that the load power is supplied. 2. Maintain the power supply voltage within the rating. 3. Tighten any loose screws on the terminal block. 4. Replace the terminal block or connector if there is faulty contact. 5. Replace the Unit if the fuse in the Output Unit has burned out due to overcurrent. 6. Replace the Output Unit if there is faulty contact on Unit connector or faulty output circuits. 7. Check the load and output wiring if load short-circuit protection has operated.
T
Travis ClarkeAug 25, 2025
Why do the input bits turn ON and OFF irregularly on my Omron Control Unit?
- A
  Amanda PerezAug 25, 2025
  If the input bits on your Omron Control Unit are turning ON and OFF irregularly, consider the following: * Maintain the external input power supply voltage within the rating, as a low or unstable voltage can cause this issue. * Implement noise countermeasures to address potential malfunction caused by noise. * Ensure the terminal block screws are tightened. * Replace the terminal block or connectors if there's faulty contact.
A
Alicia ChavezAug 26, 2025
What to do if a specific input does not turn ON on Omron Control Unit?
- B
  bethpalmerAug 26, 2025
  If a specific input on your Omron Control Unit does not turn ON, check these potential issues: 1. Replace the input device if it is faulty. 2. Check the input wiring for any breaks. 3. Ensure that the screws on the terminal block are tightened. 4. Replace the terminal block or connector if there is faulty contact. 5. Adjust the input device or correct the setting of the input response time if the external input ON time is too short or the input response time is too long. 6. Replace the Input Unit if there are faulty input circuits. 7. Correct the user program if an input bit is used in an Out instruction.
K
Kirk MillerAug 27, 2025
Why does the output turn ON and OFF irregularly on my Omron Control Unit?
- J
  John MasseyAug 27, 2025
  If the output on your Omron Control Unit turns ON and OFF irregularly, consider the following: 1. Maintain the load power supply voltage within the rating, as a low or unstable voltage can cause this issue. 2. Correct the user program so that only one Out instruction controls the output bit if the output bit is used in more than one Out instruction. 3. Implement noise countermeasures to address potential malfunction caused by noise. 4. Ensure the terminal block screws are tightened. 5. Replace the terminal block or connectors if there's faulty contact.
A
Andrew ShannonAug 29, 2025
What causes abnormal operation for the output points for the same common on Omron Control Unit?
- J
  Jasmine JohnsonAug 29, 2025
  If there is abnormal operation for the output points for the same common (8 or 16 points) on your Omron Control Unit, check the following: * Ensure that the screws on the common terminal are tightened. * Replace the terminal block or connector if there is faulty contact. * Replace the Output Unit if the fuse in the Output Unit has burned out due to overcurrent, or if there are faulty circuits in the Output Unit. * Replace the CPU Unit if it is faulty. * Check the load and output wiring if load short-circuit protection has operated.
A
Anthony BrockAug 31, 2025
What to do if a specific output does not turn ON, but the operation indicator is lit on Omron Control Unit?
- A
  angela45Aug 31, 2025
  If a specific output on your Omron Control Unit does not turn ON, but the operation indicator is lit, it could be due to: * A faulty output device (replace the device). * Broken output wiring (check the output wiring). * Loose screws on the terminal block (tighten the screw). * Faulty contact on the terminal block or connectors (replace the terminal block or connector). * A faulty relay for a Relay Output Unit (replace the Output Unit). * Faulty output circuits (replace the Output Unit).
C
Craig ConwaySep 2, 2025
What to do if none of the inputs turn ON, but the operation indicators are lit on Omron Control Unit?
- D
  Debbie CollinsSep 2, 2025
  If none of the inputs turn ON, but the operation indicators are lit on your Omron Control Unit, the issue could be faulty circuits in the Input Unit. In this case, replace the Input Unit.
M
Michael NelsonSep 4, 2025
What causes abnormal operation for the input points for the same common on Omron Control Unit?
- R
  rballSep 4, 2025
  If abnormal operation occurs for the input points for the same common (8 or 16 points) on your Omron Control Unit, check for the following: 1. Tighten any loose screws on the common terminal. 2. Replace the terminal block or connector if there is faulty contact. 3. Replace the Input Unit if there are faulty circuits in the Input Unit. 4. Replace the CPU Unit if it is faulty.
M
michaelmorrisSep 6, 2025
What to do if a specific output does not turn OFF and the operation indicator is lit on Omron Control Unit?
- D
  Donald MckenzieSep 6, 2025
  If a specific output on your Omron Control Unit does not turn OFF and the operation indicator is lit, the issue may be due to: * The output bit being used in more than one Out instruction in the user program. Correct the user program so that only one Out instruction controls the output bit. * Faulty output circuits. Replace the Output Unit.

Summary

Machine Automation Controller

NJ-series

CPU Unit

Hardware

Introduction

Sections in this Manual

4 Installation and Wiring

Explains how to install and wire the CPU Unit and configuration units.

5 Troubleshooting

Covers error identification, troubleshooting flowcharts, and hardware errors.

6 Inspection and Maintenance

Details required inspections and maintenance procedures.

Safety Precautions

Precautions for Safe Use

Guidelines for safe product usage.

Precautions for Correct Use

Guidelines for proper product operation and performance.

Precautions for Safe Use

Wiring

Precautions for Correct Use

Regulations and Standards

Conformance to EU Directives

Versions

1 Introduction to NJ-series Controllers

1-1 The NJ-series Controllers

1-2 Specifications

Detailed specifications of the NJ-series Controllers.

1-3 Overall Operating Procedure for the NJ-series Controller

2 System Configuration

2-1 Basic System Configuration

3 Configuration Units

3-1 CPU Units

Information on NJ-series CPU Units, including models and specifications.

3-2 SD Memory Cards

3-3 Power Supply Units

Specifications and selection guide for NJ-series Power Supply Units.

3-4 CJ-series Basic I;O Units

Specifications for CJ-series Basic I/O Units.

3-5 B7 A Interface Ports

3-6 CJ-series I;O Control Units and I;O Interface Units

4 Installation and Wiring

4-1 Processing at Power ON and Power OFF

Describes processing during power ON and OFF states.

4-2 Fail-safe Circuits

Provides guidance on implementing fail-safe circuits.

4-3 Mounting Units

Instructions for mounting various units and racks.

4-4 Wiring

Detailed wiring instructions for various components.

4-5 Control Panel Installation

Guidelines for installing the system within a control panel.

5 Troubleshooting

5-1 Operation after an Error

Describes controller status and operation after an error.

5-2 Troubleshooting

Provides error identification and troubleshooting flowcharts.

6 Inspection and Maintenance

6-1 Periodic Maintenance and Inspection

Details required inspections for maintaining peak performance.

6-2 Replacing the Battery

A Appendices

A-2 Specifications of Basic I;O Units

A-3 Dimensions

A-4 Load Short-circuit Protection and Line Disconnection Detection for CJ-series Basic I;O Units

Omron NJ301-1100 Specifications

General

Model	NJ301-1100
Cycle Time	1 ms
Ethernet Ports	2
Built-in EtherNet/IP Port	Yes
EtherNet/IP	Yes
Built-in EtherCAT Port	Yes
SD Memory Card Slot	Yes
Power Supply	24 VDC
Operating Temperature	0 to 55 °C
Data Memory Capacity	128 KB
EtherCAT Refresh Cycle	1 ms
Programming Language	IEC 61131-3 (LD, ST, FBD, SFC, IL)
Weight	1.5 kg
I/O points	Up to 256