Standard concern: Lack of interoperability in wireless compromises industrial applications
Syed Tauseef Ahmad, research analyst, Frost & Sullivan, Europe -- Manufacturing Business Technology, 10/15/2008 9:45:00 AM
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While the potential for wireless deployment in factory automation is high, adoption is plagued by various concerns surrounding wireless technology—not the least of which is a lack of interoperability.
Interoperability wasn’t always the major concern that it is now. Companies predominately built their own systems or purchased them from a single supplier. But evolving plant automation is spurring demand for wireless devices and systems for monitoring, alarm, and telemetry with a large number of suppliers offering these systems or solutions. Often they are customized on proprietary protocols but not based on a common standard or architecture. As a result, devices offered by multiple suppliers often are not compatible with one another.
So even though the options have increased, end users are more concerned now about the compatibility of devices. They are wary of getting locked into a proprietary system that may hinder advancement, as they may not be able to adopt any new technology. Integration issues with existing infrastructure results in time and effort to be spent by end users, while they prefer plug-and-play devices.
End users also are cautious of investing in wireless when they are not confident about the benefits that it has to offer. Given that the end users will not be very keen to replace the existing fieldbus installation, suppliers should look to integrate wireless devices to existing wired fieldbus. Currently, plant IT network assumes significance over automation network. Hence, clear boundaries and smooth integration of wireless is required with the wireless devices existing network. The existence of several open and proprietary communication protocols results in confusion among the wireless devices end users who are ready to wait until a uniform standard is established.
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| Chart 1.1 indicates the different end user’s perspective on interoperability. |
Around 83 percent of the end users across process and factory automation rated interoperability as a medium to high concern. However, the level of concern varies depending on different parameters such as end-user environment, types of wireless devices being used, the application area and the experiences of the end user with wireless devices.
For example, the refining and pharmaceutical industries expressed a greater concern over interoperability among end users, believing that integration with the existing network is important and the presence of numerous controls, fieldbus, and automation devices implies that the wireless devices need to integrate seamlessly into the existing network.
Similarly, in the oil & gas and the water &wastewater industries, wherein one of the preferred application areas for wireless devices is telemetry, end users were convinced that the wireless devices must be compatible with each other to ensure a smooth flow of data.
Attainment of true interoperability would require an open architecture such as software-based systems, in which various standards could be applied. Software such as National Instrument Laboratory Virtual Instrumentation Engineering Workbench (NILabVIEW) is capable of communicating with both standards-based and proprietary wireless networks.
End users also cite the lack of universal standards as another major concern. The need of the hour is to have common standards that offer interoperability from both the supplier and the end-user perspective.
To increase the level of adoption of wireless in discrete and the process environments, suppliers must come up with wireless devices that are compatible with each other. Moreover, there is a need for a uniform standard and open architecture to enable the seamless integration of wireless devices with existing plant infrastructure such as fieldbus or other control systems.
End users must be convinced about interoperability through product trials or demos that suppliers should offer. Nevertheless, the future for wireless devices in automation looks promising. Although end-user concern is expected to hamper the adoption of wireless in the near future, upcoming standards like SP100.11a and wireless HART are going to address this issue. In addition, numerous suppliers are supporting the initiatives that aim to establish a common standard. The increasing success stories of smooth wireless integration and functioning are likely to reduce end-user conservatism and raise the level of adoption of wireless devices.
About the author:
Syed Tauseef Ahmad is a research analyst for Industrial Automation and Process Control - Europe at New York-based Frost & Sullivan.
