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About This File

.NET Component for use in Visual Studio.NET to create HMI/SCADA apps that communicate with Modbus/TCP Server (Slave) devices via Ethernet.


  • Does not require OPC or 3rd party drivers
  • x86, x64, and Any CPU compatible
  • Visual Studio.NET 2005, 2008, 2010, 2012, 2013, 2015, and 2017 compatible
  • Most .NET targets are supported, including Web, Win Forms, WPF, console, and service apps
  • Build Win Forms, console, and ASP.NET applications that run on Linux with Mono framework
  • Extremely high performance - 5~10 mSec typical transaction time
  • Optimizes multiple register configurations into minimal 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
  • Synchronous and asynchronous read/write methods
  • Data change notifications
  • Provides common user interface across all driver classes
  • No limit on number of devices or data points
  • Multi-threaded for high data throughput
  • Includes extensive help system
  • Windows, Console, and Web Example applications with VB and C# source code included.
  • Easily connect office systems to factory floor.
  • Runtime-free for qualified applications


What's New in Version 3.9.8


  • v3.9.8
  • v3.9.2
    • AB.LOGIX.NET driver
      • Added firmware revision detection to accommodate UDT LINT field alignment changes
  • v3.8.3
    • SI.S7.NET driver
      • Added S7-1500 to Device.Model enumeration.
      • Added DT (DATE_AND_TIME) datatype support.
      • Added WSTRING (Unicode string) datatype support (S7-1200 and S7-1500).
  • v3.7.4
  • v3.7.0
    • AB.LOGIX.NET driver
      • Added A-B large CIP packet support.
      • Added A-B ControlLogix 5580 and CompactLogix 5370 / 5380 on-board Ethernet support.
  • v3.6.9 Changed installer compression algorithm. Previous version caused false positives on some security software.
  • v3.6.8 Maintenance release, refer to revision history for details.
  • v3.6.7 Maintenance release, refer to revision history for details.
  • v3.6.4 Added ASComm Excel Add-in
  • v3.6 Added unsolicited message support to AB.Logix.Net and AB.Legacy.Net drivers.