• Key Features
  • Standard Features
  • Advanced Features
  • Device Support
  • Protocols / Networks
  • Videos & App Notes
  • Help Files & Release Notes
  • Technical Blog
  • Additional Resources

Modbus RTU Server Serial Key Features Include

  • Maximum Number of Channels & Devices: 
    • Channels - 100
    • Devices per Channel - 247
    • COM Port Range - 1 to 999
    • NOTE: Practical channel/device limits will vary depending on your available system resources
  • Supports Modbus RTU Multi-drop
  • Word Order Swapping for Floating Point and Long Data Types
  • Supports Ethernet Encapsulation via Ethernet/Serial convertors, Ethernet Device or Terminal servers
  • Station numbers supported: 1-247
  • Multiple Modbus Slave devices can be configured

Standard Modbus RTU Server Serial Features Include

  • Modbus Function Codes Supported: (Blog post - demystifying Modbus Function Codes)
    • Decimal - 01, 02, 03 ,04, 05, 06, 08, 15, 16
    • Hexadecimal - 01, 02, 03 ,04, 05, 06, 08, 0F, 10
  • Full Address Range Support: 0xxxx - Output Coils, 1xxxx - Input Coils, 3xxxx - Internal Registers, 4xxxx - Holding Registers
  • Decimal or Hex Addressing Support
  • Supports all memory types and data types such as Float, Long Word, and BCD
  • Base Modbus device model supports 32-Bit Data Types as Two Registers
  • String Data Type support for Internal Registers
  • Automatic Tag Database Generation using CSV Import
  • Tag configuration supports dynamic tags from your client application


Modbus RTU Server Serial Driver Advanced Features Include

  • Simulates up to 247 Modbus RTU devices
  • Adjustable Address Base ( 0 or 1 )
  • Word Order Swapping for Float and Long Data Types
  • User Definable Read Block Sizes
  • Holding register memory access as string data (HiLo or LoHi byte order)
  • Ethernet Encapsulation Support
  • Dial-Up Modem Support
  • Adjustable RTS Flow timing for Radio Modem communications
  • Modbus RTU Multi-Drop Serial Communications
  • Supports Broadcast Messages using Device ID 0

Modbus RTU Server Serial Supported Devices

  • Modbus Compatible Devices (acting as Modbus Clients)

For full details on models and networks supported visit the Modbus Suite Supported Devices page and consult the driver help file.

Modbus RTU Server Serial Supported Protocols / Networks

  • Modbus RTU Serial Protocol
  • JBUS RTU Serial Protocol
  • Serial RS-232
  • Serial RS-422
  • Serial RS-485
  • Ethernet Encapsulated Serial - for using Ethernet/Serial convertors, Device Servers, or Terminal server hardware from a variety of suppliers.

Videos / Guides / App Notes to Help You Get Started

To insure you get the most from your investment in TOP Server™, we provide a variety of application notes/guides and how-to videos, since we know that sometimes it helps to see someone showing you how to do things.

Driver Help Files / Release Notes

Use the below links to access TOP Server release history and driver help documentation.

Access use cases, how-tos and more

Real-world use cases, step-by-step how-to's and video tutorials - our blog contains useful resources and information to help you get connected.

Modbus Specific Blog Posts

TOP Server Specific Blog Posts

Overall Software Toolbox Blog Posts

Subscribe to Blog

Additional Useful Resources

Access additional TOP Server related information below not covered in other sections:

Get Started Now

The demo is the full product once licensed. Once a client application connects to the  TOP Server, the TOP Server runtime will operate for 2 hours at a time. At the end of the 2 hour demo period, the demo timer must be reset by restarting the TOP Server runtime service.

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