Log In Register

Addressing Control Applications Using Wireless Devices

How Wired and Wireless Transmitter Installations Differ in Closed-Loop Control Applications and What Changes Are Required in the PID

03/29/2012

2 votes
Text size: - +

– Standard DeltaV Tools support simulation and tuning
  • The performance of PIDPlus in a wireless control network is comparable to PID with wired inputs.
    – PIDPlus handles lost communications better than conventional PID. 
  • PIDPlus tuning depends only upon process dynamics, not on wireless update rate.
  • For best control performance process disturbances, the guideline provided for update period should be observed. If disturbance response is not critical, then a slower update period may be used.


    References
    PID Advances in Industrial Control, IFAC Conference on Advances in PID Control PID'12, Brescia, Italy, March 28-30, 2012. http://pid12.ing.unibs.it/sp_blevins.html.
    DeltaV v11 PID Enhancements for Wireless, DeltaV Whitepaper, August, 2010, http://www2.emersonprocess.com/siteadmincenter/PM%20DeltaV%20Documents/Whitepapers/WP_DeltaV%20PID%20Enhancements%20for%20Wireless.pdf.
    WirelessHART Successfully Handles Control, Chemical Processing, January, 2011, http://www2.emersonprocess.com/siteadmincenter/PM%20Articles/WirelessHART%20Successfully%20Handles%20Control.pdf.
    Wireless – Overcoming Challenges of PID Contro l& Analyzer Applications, InTech, July/August, 2010, http://www.isa.org/InTechTemplate.cfm?template=/ContentManagement/ContentDisplay.cfm&ContentID=83041.
    PIDPlus, An Enhanced PID Control Algorithm for Wireless Automation, AS-74.3199 Wireless Automation, Aalto University, Finland, http://autsys.tkk.fi/intranet/as-0.3200/attach/S09-19/loppuraportti.pdf.
    Incorporating Wireless Devices into Single-Use Disposable Bioreactor Design, 2009 Dhirubhai Ambani Life Sciences Symposium, http://www.modelingandcontrol.com/Wireless-Devices-in-Single-Use-Bioreactors.pdf.
    Improving PID Control with Unreliable Communications, ISA EXPO Technical Conference, 2006, http://www.automation.com/pdf_articles/10_improving_pid.pdf.
    Similarity-based Traffic Reduction to Increase Battery Life in a Wireless Process Control Network, ISA EXPO2005, Houston, TX, www.cs.utexas.edu/~sjp/publications/isa06.doc
    2 votes
    Related Content You May Like If you enjoy this article, our editors think you may enjoy this related reading.