What’s holding back broader adoption of wireless technologies in the process industries? A panel of vendor and user experts discussed that and other topics at October’s ISA Expo in Houston. It seems that although technical and attitudinal obstacles to this emerging technology remainCONTROL ENGINEERING China版权所有, many are being systematically addressed and overcome. Panel members included Peter Fuhr, Wi-Fi Sensors Inc.; Patrick Schweitzer, Exxon Mobil and ISA 100 committee co-chair; Jose Gutierrez控制工程网版权所有, Emerson; Herman Storey, recently retired from Shell Global Solutions; Dave Kaufman控制工程网版权所有, Honeywell; and Ed Ladd, HART Communication Foundation.
        One obstacle suggested by panelists was a sense of risk related to communication failures (“Can you hear me now?”). Some users aren’t convinced that the signal will get through when it has to. Another thought was that the discussion has largely moved from technical and reliability issues to disagreements over system ownership, meaning thatCONTROL ENGINEERING China版权所有, from the perspective of plant managers, IT groups tend to latch onto wireless more than other plant level technologies, and then want to exercise Control or at least have influence over deployments. IT people know what wireless is, as opposed to something like a fieldbus, and they’re concerned that unmanaged experiments in the plant could interfere with their systems.
        While security is still an important concern, the consensus among current and potential users was that technical solutions are possible and are already being implemented. While wireless Ethernet (Wi-Fi) may present an attack surface that hackers understand, instrumentation-level communication would be difficult to penetrate, although users should not rule out that possibility. There were questions about use of wireless technology with safety systems and specific safety devicesCONTROL ENGINEERING China版权所有, such as gas detectors. The panel recoiled some