Chemical Processing - May 2008 - (Page 25)

>> Data security Frame Timeslot Used Timeslot Figure 6. Use of short and varying-interval time slots for sending data enhances security. • Authenticating that the data haven’t been altered as they pass through the mesh network. • Changing the transmitted channel after each message is sent, making it hard to snoop at data. • Requiring a physical connection to the instrument (via a HART hand-held) for the instrument join procedure. Time to act Vendor testing and end user trials have shown that Wire- lessHART provides the reliability, security and simplicity that the chemical industry demands from a wireless network. You can take advantage of the technology today to improve your vision of the process and to unlock valuable information hidden within existing instruments. It’s clear that WirelessHART will complement not displace 4–20-mA loops. We’ve cited some applications, such as short-term diagnostic measurements, condition checking via adapters and instrument replacement, worth considering. The WirelessHART speciﬁcation is available now. Many signiﬁcant instrument vendors (e.g., ABB, Emerson, Siemens and Yokogawa) are at an advanced stage of product development. Indeed, WirelessHART instruments and devices will start to reach the market in the middle of 2008 and the selection will widen during 2009. Don’t wait. An open solution for an instrument wireless network is here. Find a local seminar to build you knowledge and identify the benefits a WirelessHART solution can provide for your process. CP Gareth Johnston is wireless product manager for ABB, St. Neots, U.K. Alan Munns is product manager, re nery solutions, for ABB, St. Neots, U.K. Email them at gareth.johnston@gb.abb.com and alan.munns@gb.abb.com. Rental Cooling. For Chemical Process Applications Rental Cooling Emergency Planned Supplemental Turnaround Pilot Plant We keep process lines running at peak capacity. Our engineers speak your technical language and can help you solve your temperature control problem. Chillers Cooling Towers Pumps Heat Exchangers Tanks Air Conditioners Air Handlers Dehumidifiers Heaters Boilers Generators 800-586-8336 We are the rental cooling, heating and dehumidiﬁcation experts. May 2008 • 25 CarrierRentals.com www.chemicalprocessing.com http://CarrierRentals.com http://CarrierRentals.com http://www.chemicalprocessing.com

Table of Contents Feed for the Digital Edition of Chemical Processing - May 2008

From the Editor ChemicalProcessing.com Field Notes In Process Energy Saver Compliance Advisor WirelessHART signals a change at plants Avoid costly fabrication mistakes Watch out with variable speed pumping Hot cutover boosts control system migration Plant InSites Process Puzzler Equipment & Services Product Spotlight/Classifieds Ad Index End Point

Chemical Processing - May 2008

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