TOP Server Modbus Ethernet Overview
Part of SuiteMulti-Industry

TOP Server Modbus RTU Server Serial OPC Driver

Make your HMI/SCADA/MES or Other Software Appear to be a Modbus Device

4.8(102 reviews)
High Density

100 channels, 247 devices each

Data Flexibility

All Modbus types supported

Fast Setup

CSV import, auto tags

Reliable Comms

Stable across all networks

Product Overview

The Modbus RTU Server Serial driver works in conjunction with TOP Server to provide data exchange between OPC UA, OPC DA, SuiteLink and DDE clients and Modbus RTU Client devices using the Modbus RTU Serial protocol over direct COM: port RS-232/422/485 connections or via Ethernet/Serial Converters, Ethernet Device Servers, or Ethernet/Serial Terminal Servers.

This driver allows client software connected to the TOP Server to appear as Modbus RTU devices on the Modbus RTU network. This unsolicited mode allows the TOP server to receive data by exception from Modbus RTU Clients, whether they are actual PLCs or devices acting as Modbus RTU Clients or other software applications capable of sending Modbus RTU Client requests. Data integrity is ensured using extensive error handling.

If you need TOP Server to initiate data exchange with Modbus RTU Devices then you would use the Modbus RTU Client Driver, also part of the TOP Server Modbus Suite, so there's no added cost to do either option or both.

Why Choose This Driver?

Proven benefits that help you deploy faster and operate more reliably

Function Codes

Supports Modbus function codes in decimal, 01, 02, 03, 04, 05, 06, 08, 15, 16, and hexadecimal, 01, 02, 03, 04, 05, 06, 08, 0F, 10.

Address Range

Full address range support including 0xxxx output coils, 1xxxx input coils, 3xxxx internal registers, and 4xxxx holding registers.

Addressing Options

Supports both decimal and hexadecimal addressing formats.

Data Types

Supports all memory types and data types including float, long word, and BCD.

32 Bit Support

Base Modbus device model supports 32-bit data types using two registers.

String Support

Supports string data types for internal registers.

Tag Generation

Automatic tag database generation using CSV import.

Dynamic Tags

Supports dynamic tag configuration directly from client applications.

"Exceptionally helpful, best international support I've ever received and prompt."

Jordan H

CS Solutions

Key Features & Benefits

Everything you need for reliable Modbus TCP Ethernet connectivity

Scalability

Supports up to 100 channels and 247 devices per channel, with limits based on available system resources.

Serial Configuration

COM port range from 1 to 999 with station numbers supported from 1 to 247.

Network Support

Supports Modbus RTU multi drop and Ethernet encapsulation via converters, device servers, or terminal servers.

Data Handling

Includes word order swapping for floating point and long data types, with support for multiple Modbus slave devices.

Technical Specifications

Protocols

Supports Modbus RTU and JBUS RTU serial protocols.

RS 232

Serial communication over RS 232.

RS 422

Serial communication over RS 422.

RS 485

Serial communication over RS 485.

Ethernet Encapsulation

Supports Ethernet encapsulated serial using converters, device servers, or terminal servers.

Supported Devices

  • Modbus Compatible Devices (acting as Modbus Clients)

Note: Supports any Modbus TCP/IP Ethernet-capable device. Includes specialized support for Applicom models, flow measurement devices, and gateway/bridging configurations.