uModbusRTUFDI Communication Server

The uModbusRTU FDI Communication Server is a dedicated OPC UA Server providing access to field device using Modbus RTU protocol. Communication between the FDI Host system and the uModbusRTU FDI Communication Server is based on OPC UA.

  • Support all 21function codes of Modbus
  • Support for  RS-485 / RS-232
  • Secure communication
  • Specification Compliance
    • FCG_TS62769-7_CommunicationDevices_1.0.5
    • FCG_TS62769-100_Profiles – Generic Protocols_0.3.0
    • FCG_TS62769-115-2_Profiles – PSD ModbusRTU_0.2.0
    • MODBUS over serial line specification and implementation guide V1.02
    • OPC UA SDK v1.0.2

System Requirements

  • Microsoft Windows 7, Windows 10 (32 Bit / 64 Bit variants supported)
  • Free space on hard disk approx. 10 MB
  • 1-GHz-Processor or better with 32 Bit (x86) or 64 Bit (x64)
  • 1 GB RAM (32-Bit) or 2 GB RAM (64-Bit)


  • uModbusRTU FDI Communication Server installer
  • uModbusRTU FDI Communication package
  • Simulator Device package supporting all function code for Modsak simulator.
    [Downloadable from]
  • The Modsak simulator data configuration

When you download, purchase a license for, or request a registration key for uModbusRTU FDI Communication Server, you are agreeing to the license conditions for the use of that software.
There are two types of License

  • Package Developer License
    This license is applicable for any Modbus Device Package Developer interested in testing Modbus Package with the field instrument.

    • Evaluation license 
      For a single user on a single machine.
      This type of license is free, but is usually valid for only 15 days. Each user will be granted only one evaluation license.
    •  Single Seat license
      For a single user on a single machine.The license cost is 320 USD which includes one year of free support and maintenance.
    • Volume license
      For volume license, Please contact us for details.
  • FDI Host License
    FDI Modbus Communication Server can be customizable based on the specific needs of the FDI host, please contact us for details.