WirelessHART Technology Standard

WirelessHART is an open-standard wireless networking technology developed by the HART Communication Foundation. The protocol utilizes a time synchronized, self-organizing, and self-healing mesh architecture, forming full mesh network topologies. The protocol currently supports operation in the 2.4 GHz ISM Band using IEEE 802.15.4 standard radios. Developed as a multi-vendor, interoperable wireless standard, WirelessHART was defined specifically for the requirements of process field device networks. The standard began in 2004, and made its first appearance on the market in late 2007.

Backward compatibility with the HART user layer allows transparent adaptation of HART compatible control systems and configuration tools to integrate new wireless networks and their devices, as well as continued use of proven configuration and system-integration work practices. With an estimated 25 million HART field devices currently installed, and approximately 3 million new wired HART devices shipping each year, WirelessHART is an important complement to the HART standard.

Architecture

The Nivis WirelessHART system is composed of the following functional entities:

  • Field device—Routing
  • Field device—Non-Routing
  • Access Point
  • Gateway
  • Network Manager
  • Security Manager

Specific implementation architecture is flexible, allowing various network topologies to be formed by combining several functional entities of those listed above, based upon the application requirements. From graph to source routing, the Nivis solution incorporates firmware, hardware and software for all its functional entities, thus providing a comprehensive solution.