Wireless Hart

How to Reduce Costs and Time for Wireless Hart in Industrial Networks

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Direct Access

Directly connecting the WirelessHart gateway with the plant network has proven to be advantageous. This is because the DCS as well as other higher functioning plant tools, such as the asset management system (AMS), HMI screens, or a data historian, can access process and diagnostics data. Generally, the gateway interface is based on a protocol such as Hart IP or FDT/DTM, which is suitable for calibrating, configuring, and transferring measurement data.

This means that communication with the field devices is realized without converting or mapping to another protocol. As a consequence, it is possible to provide more efficient maintenance schedules so that it is no longer necessary to shut the plant down at regular intervals, but rather only when devices need maintenance.

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Further, safety of operating personnel is increased as devices can be wirelessly calibrated. As a consequence, personnel no longer have to venture into hazardous areas. Further, it is guaranteed that device calibrations are up-to-date, which in turn ensures improved accuracy in the process (Fig. 3).

Summary

Expanding plant networks using the WirelessHart standard offers numerous advantages. As a consequence, field devices and instruments that are difficult to access can be directly coupled to the higher-level control system of the plant. This means that personnel obtain a far wider access to a significantly more comprehensive database.

* D. Burrell is Wireless Product Specialist and G. Schmidt is Wireless Product Manager, Phoenix Contact Inc., Harrisburg, Pennsylvania, USA.

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