QuickServer - BACnet MS/TP - Modbus RTU

The FS-QS-1010-0367 QuickServer provides a cost-effective, easy to use interface from BACnet MS/TP to Modbus RTU.




Protocol Datasheets

Modbus RTU


Gateway Datasheets


Configuration Manuals

Modbus RTU



  • This gateway can read Modbus data from your Modbus RTU devices and publish it as BACnet MSTP data.
  • It can also write to the Modbus RTU devices.
  • This gateway can also do the reverse, read BACnet MSTP data and publish it as Modbus RTU data.
  • It can also write to the BACnet MSTP devices.

In summary, this gateway can act as:

Master on the Modbus RTU network: Hence it is capable of reading data from the various Modbus slave devices and writing data to them if required.

Slave on the Modbus RTU network: You can use the gateway in this mode if you have a Modbus RTU master on the network which would be reading data from the gateway.

Client/Master on the BACnet MSTP network: Hence it is capable of reading data from the various BACnet MSTP devices and writing data to them if required.

Server/Slave on the BACnet MSTP network: The gateway can be configured to be a server of data values, hence another BACnet MSTP client can read data from the gateway and write data into the gateway.



QuickServer Key Features:

  • BACnet Testing Laboratory (BTL) Mark
  • Ability to interface up to 250 points of common BAS protocols
  • Multi-configuration capability; specific configurations selectable via DIP switches or software
  • Flat panel mount standard, DIN rail mount option
  • DIP switches to select baud rate or node ID on the fly

BACnet MS/TP driver:

  • Driver type: Client or Server
  • Data Link layer: MS/TP master (Clause 9), baud rate up to 38.4 Kbps, MS/TP slave (Clause 9), baud rate up to 38.4 Kbps
  • Connection type: RS-485 (two wire, half duplex)
  • Baud rates: 9600, 38400, 76800
  • BACnet COV support for fast data communication while reducing traffic over a BACnet network
  • Data types supported:
    • AI - Analog Input Object
    • AO - Analog Output Object
    • AV - Analog Value Object
    • BI - Binary Input Object
    • BO - Binary Output Object
    • BV - Binary Value Object
    • MI - Multi-state Input Object
    • MO - Multi-state Output Object
    • MV - Multi-state Value Object

Modbus RTU driver:

  • Driver type: Client or Server
  • Connection type: RS-232 or RS-485 (Two-wire, Half-Duplex)
  • Baud rate: 110 - 115200, standard baud rates only
  • Commands supported:
    • 01 - Read Discrete Output Status (0xxxx)
    • 02 - Read Discrete Input Status ((1xxxx)
    • 03 - Read Output Registers (4xxxx)
    • 04 - Read Input Registers (3xxxx)
    • 05 - Force Single Coil (0xxxx)
    • 06 - Preset Single Register (4xxxx)
    • 15 - Force Multiple Coils (0xxxx)
    • 16 - Preset Multiple Registers (4xxxx)
      • BACnet is a trademark of ASHRAE


How to configure the FieldServer gateway?

-We will configure the gateway for you based on your requirement and support you during commissioning of the gateway, so you do not  have to worry about configuring the FieldServer gateway.

-However, it is very helpful to know how to configure the devices. All the required tools and supporting product manuals with be provided completely free of cost with your purchase.

-Configuration of the FieldServer is done using a '.csv' file. This file can be edited using any text editor (example Microsoft excel).

-In this file we need to enter information for the Client and Server side interfaces of the FieldServer. This includes but is not limited to:

                Node ids of the slave devices

                IP addresses/device address of the slave devices

                Baud rate, parity, stop bits for serial communication

                Scan rates

- And finally we need to create an internal mapping that would map each data value read on the client side to a data value on the server side.

-For detailed information on configuration please get in touch with us and review the configuration manual on top of this page