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DeltaV

DeltaV
Discussions related to the DeltaV distributed control system (DCS).
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  • Blog Post: Wireless Control Presentation – ACC 2014

    This last week I gave a paper presentation at the American Control Conference, Portland, OR. The topic of this paper was PID Control Using Wireless Measurements. I co-authored the paper with Mark Nixon and Willy Wojsznis. Below is a picture taken during the presentation. This paper presents a wireless...
  • Blog Post: Wireless Throttling Valve Power Consumption

    Something that all manufactures of wireless throttling valves must be concerned with in their design is battery power consumption. In a control application using a wireless throttling valve much of the power available to the actuator is used to track changes in target valve position. To minimize battery...
  • Blog Post: Utilizing Wireless Throttling Valves in Control

    Over the last five years a wide variety of WirelessHART transmitters have been introduced by the major manufacturers of field devices. The PIDPlus enables closed loop control using the slower update rate provided by a wireless transmitter. The broad acceptance of wireless transmitters has generated an...
  • Blog Post: Wireless Control – ACC 2014

    The 2014 American Control Conference, ACC, will be held Wednesday through Friday, June 4 – 6, at the Hilton Portland & Executive Tower, Portland, OR. As noted on the conference web site, the ACC is internationally recognized as a premier scientific and engineering conference dedicated to the...
  • Blog Post: Wireless Measurements in Control Applications

    As wireless technology continues to be used in process manufacturing facilities, those used in control applications are increasing. At the ISA Automation Week conference, Emerson’s Terry Blevins, Mark Nixon, and Marty Zielinski authored the paper, Using Wireless Measurements in Control Applications...
  • Blog Post: Using Wireless Measurements In Control Applications

    Wireless transmitters may be preferred in applications where new measurements are required since the cost may be lower than that associated with installing wired transmitters. However, there is a significant differences in the frequency and manner in which a new measurement value is updated by a wired...
  • Blog Post: ISA Automation Week – Nov 5-7

    ISA Automation Week is one of the major conferences conducted each year in North American. This year the conference will be held November 5-7 at the Nashville Convention Center, Nashville, TN. The convention center is convenient to reach – just eight miles away from the Nashville International Airport...
  • Blog Post: Control Using Wireless Measurements

    A number of technical challenges must be addressed when using a wireless measurement in closed loop control. In DeltaV v11 we introduced a PID option known as PIDPlus that may be selected when a wireless transmitter is used in a control application. When the PIDPlus option is selected then the same quality...
  • Blog Post: Meet The Expert Session – Advanced Control Foundation

    As I mentioned in an earlier blog, Willy Wojsznis and I hosted a Meet the Expert session at Emerson Exchange 2012 that covers key points contained in the book Advanced Control Foundation – Tools, Techniques, and Applications. Below is a picture from this session. I received permission from the Emerson...
  • Blog Post: Advanced Control Foundation at Emerson Exchange 2012

    The International Society of Automation (ISA) always has a booth at Emerson Exchange to display books published by ISA and make these books available for purchased. The book that Mark Nixon, Willy Wojsznis, I co-authored this year, Advanced Control Foundation – Tools, Techniques, and Applications was...
  • Blog Post: Emerson Exchange 2012

    If you attended Emerson Exchange 2012 in Anaheim, California, Oct 8-12th then I am sure you will agree this event exceeded all expectations. With over 350 workshops and short course to select from, it was always easy to find a presentation of interests. The exhibit area was open the first three days...
  • Blog Post: Addressing Control Applications Using WirelessHART Devices

    At Emerson Exchange, 2012 I will be co-presenting a workshop with Mark Nixon and Marty Zielinski titled Addressing Control Applications Using WirelessHART Devices. In this workshop we will be address the technical basis for the PID modification, known as PIDPlus, that are included in DeltaV v11 to address...
  • Blog Post: Event Based PID Control

    An entire session of the IFAC PID’12 conference was dedicated to Event Based PID Control. The introduction of wireless transmitters in the process industry is one of the primary motivations for the research in this area. Willy Wojsznis and I both sat in on this session to see the latest work in this...
  • Blog Post: Control Using Wireless Devices – Conclusions

    Field experience using WirelessHART in control applications may be summarized in the following manner: WirelessHART measurements may be used in closed loop control applications.  Window communications mode minimizes power consumption PIDPlus is a standard feature of DeltaV and works with standard WirelessHART...
  • Blog Post: Control Using Wireless Devices – Field Results Part 2

    The Separations Research Program was established at the J.J. Pickle Research Campus in 1984. This cooperative industry/university program performs fundamental research of interest to chemical, biotechnological, petroleum refining, gas processing, pharmaceutical, and food companies. CO2 removal from stack...
  • Blog Post: Control Using Wireless Devices – Field Results Part 1

    Broadley James manufactures bioreactors and control systems (based on DeltaV) that are used in the life science industry. To explore the use of WirelessHART transmitters in bioreactor control, a portable Hyclone 100 liter disposable bioreactor was instrument with a Rosemount WirelessHART gateway and...
  • Blog Post: Control Using Wireless Devices – Control Performance Part 2

    The reliability of WirelessHART device communication has been well established. Even so, in the event of loss communication, the expected control behavior is of interest. The simulation environment was used to compare the behavior of the PIDPlus for loss of communications to a PID with a wired transmitter...
  • Blog Post: Control Using Wireless Devices – Control Performance Part 1

    When the PIDPlus is used with a wireless transmitter in a control application the performance will be comparable to that achieved using a wired transmitter with a wired transmitter. To demonstrate this, the module shown below was created in DeltaV that allows the control using PIDPlus using s wireless...
  • Blog Post: Control Using Wireless Devices – The Solution Part 2

    In Solution Part 1 we examined that can be made in the PID reset to accommodate slow and/or non-periodic measurement update. To further enhance the response for continuous changes in setpoint the implementation of the PIDPlus may be modified as shown below. This PIDPlus implementation is standard in...
  • Blog Post: Control Using Wireless Devices – The Solution Part 1

    As mentioned my previous block, the communication capability of WirelessHART devices and a modification in the way the PID enable control using wireless devices. The standard communication techniques that are supported by a WirelessHART device are defined in HART 7 specification that has been adopted...
  • Blog Post: Control Using Wireless Devices – The Challenge

    There are significant difference in the frequency and manner in which anew measurement value is updated by a wired transmitter vs. a wireless transmitter. Thus, it is natural to question what impact this has whena wireless transmitter is used in closed loop control. Since most wireless transmitters are...
  • Blog Post: Control Using Wireless Devices – Namur’s Interest

    Earlier this year, the Namur Working Group 4.15 invited Emerson and four other major manufactures of distributed control systems and wireless transmitters to present their activities and R&D work concerning closed loop real time control applications based on wireless technology. In this meeting with...
  • Blog Post: Control Using Wireless Devices – Part 1

    Work on the WirelessHART specification began over seven years ago. Since that time the WirelessHART specification has been published by the HART Communications Foundation. Also, in 2010 WirelessHART was approved by IEC as an international standard,  IEC 62591Ed. 1.0. From the very beginning, the WirelessHART...
  • Blog Post: Recovery from a Process Saturation Condition

    At Emerson Exchange, 2011, I had the pleasure of working with Daniel Coyne, Manager, Automation, BP America Inc., to host a workshop on Recovery from a Process Saturation Condition. The workshop addresses the improved recovery from a process saturation ...read more