New WirelessHART Gateway Device Simplifies Integration for End User Implementation

The process industry’s three leading organizations dedicated to control network technology—the HART Communication Foundation, Fieldbus Foundation, and PI (Profibus & Profinet International)—have joined forces to create an architecture for a new WirelessHART® gateway device. The device will allow a WirelessHART network of devices to communicate bi-directionally with a host automation system via the Fieldbus Foundation High Speed Ethernet (HSE) protocol or the PI protocol, Profibus.

The cooperative project addresses the concerns of industry users by delivering simple and reliable integration of a WirelessHART network with Fieldbus Foundation and PI wired networks. When completed, the architecture and its related specifications provide a standard structure for others in the industry to design and build the gateway device.

The architecture also provides the information needed for creation of gateway configuration software that could reside in either the host automation system or a stand-alone third party product. The gateway device maintains a consistent overall architecture for easy integration of WirelessHART networks and sensors into different host automation systems from different manufacturers.

The specification covers the three primary functions needed for the integration: Gateway Configuration, Wireless Sensor Configuration and System Operation.

GATEWAY CONFIGURATION
Gateway configuration is performed by the gateway engineering application in the host automation system. This application uses client/server communications over HSE or Profibus to configure the I/O mapping of the wireless sensor parameters (such as device address, device tag, process variables, process alarms and other data) into database objects.

The application uses the Device Description (DD) files that are provided by the gateway supplier and the wireless sensor supplier. The DD files are also needed during operation, so they are stored in the host system.
Each object is identified by an object index, and has the DD reference as part of the object data. The object indices are organized into a gateway directory that is used by the operator interface application to display the parameters.

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