Knowledge base Automation Systems Human Machine Interfaces (HMI)

NS Serial Connection With PLCs

Modified on Thu, 9 Oct, 2025 at 3:47 PM

Introduction

This tutorial is intended as a supplement to the original manuals for the products. Therefore use it only to become familiar with the product, and not as guide for a complete installation.

This document shows what one must do to get the serial connection between an Omron NS operator panel and an Omron PLC
(CJ1M in this example) within the context of CX-Programmer 5.0 and NS-Designer 6.0.

Settings on the NS Panel

Start NS-Designer, and create new project or open existing.
Select Settings-> System Setings. Select All-Comm sheet and set Serial Port A or
B to "PLC".

Select the Serial Ports tab
and set NT Link (1: N) to Unit No. 1 and select Standard or High-Speed communication speed
(Comm. Speed).

Communication settings are now 38,400 (Standard) / 115200
(High-Speed), 8, N, 1

Close the window with OK, and lastly Download the whole project to NS panel at the port that is set to None.

Settings on the PLC

Start CX-Programmer, and create new project or open existing.

Double click on Settings in the Project menu on the left of the screen. Select Host Link Port, and seen Communications Settings for Custom.

Set Baud to 38400 (Standard) or 115200 (High Speed), and Moderate to NT Link (1: N), and NT / PC Link Max to 1 as per the error message.

Close the window, and download the entire Settings to the PLC while it is in the Stop / Program mode.

PLC settings in CX-Programmer connecting to NS