---
title: "Modbus Server | Introduction | N3uron KB V1.22"
slug: "modbus-server-introduction"
description: "Modbus Server is a N3uron module designed to provide enhanced connectivity for all devices and third-party applications requiring Modbus communications…"
updated: 2026-02-04T20:51:31Z
published: 2026-02-04T20:51:31Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.n3uron.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

******Modbus Server** is a **N3uron**module that provides enhanced connectivity for all devices and third-party applications requiring Modbus communications. It allows users to create and configure one or multiple **Modbus Slaves** to expose data acquired through any of the other **N3uron** modules, such as the OPC UA Client, REST API Client, MQTT Client, Siemens, DLMS Client, IEC 104 Client, IEC 102 Client, and other data acquisition and edge computing modules available within the platform. This module supports communications via ethernet, including **TCP** and **encapsulated RTU**.

**Supported Function Codes:**

| **Function name** | **Code** | **Hex** |
| --- | --- | --- |
| Read Discrete Inputs | 02 | 0x02 |
| Read Coils | 01 | 0x01 |
| Write Single Coil | 05 | 0x05 |
| Read Input Register | 04 | 0x04 |
| Read Holding Register | 03 | 0x03 |
| Write Single Register | 06 | 0x06 |
| Write Multiple Registers* | 16 | 0x10 |

Note:Function 16 is supported; however, multiple writes are not possible, thus it works like function 6 (write single register).