Fieldbus Foundation issues Hart transducer block specification
January 2012
Fieldbus & Industrial Networking
The Fieldbus Foundation has issued a Foundation wireless and remote I/O (WIO) preliminary specification addressing fieldbus transducer blocks for wired and wireless HART devices, together with updates to the WIO System Architecture and WIO Data Structures related to the transducer block specification.
Part of the Foundation for Remote Operations Management solution implementing wireless and remote I/O, the new technical specification defines a fieldbus transducer block used to represent HART devices within Foundation for Remote Operations Management devices. In addition, the specification describes the expected method for HART configuration tools and asset-managing hosts to access devices using the native HART command protocol transported through the Foundation High Speed Ethernet (HSE) network. The specification also defines structures to identify and maintain device status in wired multidrop networks as well as in WirelessHART mesh networks connected to Foundation for Remote Operations Management devices.
Within the Foundation architecture, H1 and HSE provide a distributed function block capability with HSE serving as a larger pipeline offering increased speed and throughput. The WIO development expands these capabilities by establishing open, non-proprietary specifications for a wired or wireless HSE backhaul network integrating various wireless Foundation for Remote Operations Management devices with interfaces to wireless field device networks.
HSE provides an efficient way to bring large concentrations of discrete and analogue field I/O from modular devices back to the control room using a high-speed HSE connection. Employing HSE devices functioning like a smart remote terminal unit (RTU), the technology brings all forms of conventional I/O into the native fieldbus environment easily. This solution makes discrete-in, discrete-out, analogue-in, analogue-out and H1 fieldbus available over a common Ethernet network. The addition of remote I/O further tightens the integration of process instrumentation within a Foundation control system infrastructure.
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