Tag Archive: PIDPlus

Oct
14

Control Using Wireless Measurements

Control Using Wireless Measurements

During the initial development of WirelessHart we began researching how to address control applications that use a wireless measurement and/or wireless actuator. To extend battery life a wireless transmitter may be setup to communication the measurement value much slower than the update rate of a wired installation. Also, when the transmitter supports Window communications (as …

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Sep
09

Control Using Wireless Measurements

Kalman Filter In Wireless Control

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 control as wired …

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Nov
26

Addressing Control Applications Using WirelessHART Devices

Addressing Control Applicatons Using WirelessHART Devices

I traveled to Germany earlier this year for a meeting with Namur to present Emerson’s approach for addressing control applications using WirelessHART devices. WirelessHART transmitters have been installation by many plants in Europe. The reliability of these devices has been well established and many of these plants are now interested in using WirelessHART transmitters in …

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Nov
12

Meet The Expert Session – Advanced Control Foundation

Advanced Control Foundation Short Course

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 board to record the audio …

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Nov
05

Advanced Control Foundation at Emerson Exchange 2012

Advanced Control Foundation at Emerson Exchange

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 published just two weeks before the opening of Emerson …

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Oct
29

Emerson Exchange 2012

DeltaV Advanced Control Booth 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 from 4-8pm. In …

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Aug
27

Addressing Control Applications Using WirelessHART Devices

EmersonExchange2012

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 control using the non-period, slow measurement updates …

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May
21

Event Based PID Control

Event Based PI 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 area. I …

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Apr
23

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 devices.  Standard DeltaV Tools support Simulation and Tuning. The performance of PIDPlus in …

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Apr
16

Control Using Wireless Devices – Field Results Part 2

Table 2 Field Evaluation of Wireless Control at UT

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 gas is a focus project for which WirelessHART transmitters were installed for pressure and steam flow control …

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