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Modbus/TCP Client (Master) Driver for .NET

Product Summary

ASComm.NET Modbus/TCP Client driver provides high-performance connectivity to Modbus/TCP Server PLCs, controllers, instruments, and other devices via Ethernet.

Use Visual Basic, C#, C++, and ASP.NET to create HMI, SCADA, data logging, and IIoT applications targeting Win Forms, WPF, Web, console, service, and Linux.

Allows your .NET application to read/write registers on Modbus/TCP Server devices.

Powerful pre-built example applications with VB and C# source code included in development package.

Runtime-free for qualified applications

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Catalog Information

For detailed information on each license option, choose the license type using the buttons below.

For developers who need to build deployable applications.

One development license is required for each development seat.

For multiple developers, consider Team Edition licensing.

Projects built with a Full Development license generate an embedded runtime license which is embedded into your executable assembly.

The embedded runtime license system eliminates the need for license activation steps on runtime PCs.

  Subscription Edition Standard Edition
Price (USD) $599 $499
Tech Support 12 Months 30 Days
Updates 12 Months Current Version Only
Online Purchase Buy Now Buy Now
Offline Purchase Order Form or Call
Version View Revision History
Availability Immediate via Internet Download

Key Benefits

  • Does not require Schneider Electric, OPC or external drivers.
  • x86, x64, and Any CPU compatible
  • Broad .NET target support including Web, Windows, console, and service apps.
  • Can be configured programmatically or visually
  • Visually design entire communications setup without writing a single line of code
  • Supports block transfers of up full file capacity
  • Extremely high performance - capable of sub 5 mSec transaction time
  • Highly optimized to minimize communications transactions
  • Tag database can be configured via code or visual designer
  • Abstract base classes allow you to write generic code that works with all drivers
  • Build Windows Forms and console applications that run on Linux with Mono framework.
  • Synchronous and asynchronous read/write methods
  • Data change notifications
  • Provides common API across all driver classes
  • No limit on number of devices or data points
  • Multi-threaded for high data throughput
  • Includes extensive help system
  • Example applications with VB and C# source code included.
  • Easily connect business systems to factory floor systems.
  • No shipping charges for online delivery.
  • Immediate Internet delivery and online license activation
  • No runtime fees or keys for qualified applications


Modbus Compatibility

Modbus Functions

  • 1 - Read Coils
  • 2 - Read Discrete Inputs
  • 3 - Read Holding Registers
  • 4 - Read Input Registers
  • 5 - Write Single Coil
  • 6 - Write Single Register
  • 7 - Read Exception Status
  • 11 - Get Comm Event Counter
  • 12 - Get Comm Event Log
  • 15 - Write Multiple Coils
  • 16 - Write Multiple Registers
  • 17 - Report Slave ID
  • 20 - Read File Record
  • 21 - Write File Record
  • 24 - Read FIFO queue


Address Modes

  • Zero-based
  • One-based
  • Modicon 5-digit (1, 10001, 30001, 40001)
  • Modicon 6-digit (1, 100001, 300001, 400001)


Platform Compatibility


  • Requires .NET framework 2.0 or higher
  • Visual Studio 2017
  • Visual Studio 2015
  • Visual Studio 2013
  • Visual Studio 2012
  • Visual Studio 2010
  • Visual Studio 2008
  • Visual Studio 2005


Operating System

  • Windows Server 2016
  • Windows 10
  • Windows Server 2012
  • Windows 8.x
  • Windows 7 SP1 (requires SHA-2 update)
  • Windows Server 2008 R2 SP2 (SP1 requires SHA-2 update)