Tag Archive: Wireless

Feb
17

High Speed Wireless Control

I was recently sent a link to a YouTube video of a control demonstration by professor Raffaello D’Andrea, The Institute for Dynamic Systems and Control at ETH, Swiss Federal Institute of Technology, Zurich. ETH is one of the world’s leading universities for technology and the natural sciences. I found the demonstration by Professor D’Andrea to …

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Feb
03

WirelessHART – Monitoring and Control of On-Off Valves

TopWorx_4310

A number of WirelessHART devices have been introduced over the last few years to monitor the status of on/off valves. For example, the TopWorx 4310 WirelessHART Valve Position Monitor can be used detect linear and rotary movement using non-contact technology with limit switch feedback. Such devices provide a low cost way to monitor the position …

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Jan
27

WirelessHART – Level Switch

2160 WirelessHART Transmitter

In many tank level control applications, a level switch is installed and used as an interlock to help prevent overfilling the tank. For example, in many existing installations you may find a vibrating fork liquid level switch wired as an input to the control system. However, today it is possible to reduce the cost of installing a …

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Jan
20

WirelessHART – Discrete Measurement

702 Transmitter

Many manufacturers initially introduced WirelessHART field devices that were designed to support continuous process measurements such pressure, flow, temperature, and level. Also, WirelessHART transmitters are now available for analytical measurements such as pH. Recently you may have noticed that some manufacturers have introduced WirelessHART field devices for discrete measurement. For example, Rosemount has released the …

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Dec
09

Using Wireless Measurements In Control Applications

Using Wireless Measurements in Control

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 transmitter vs. a wireless transmitter. Such differences must …

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Oct
21

ISA Automation Week – Nov 5-7

2319-AW-panel-for-2013

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. A number of standards groups conduct meetings …

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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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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
28

PID Advances in Industrial Control

Terry Blevins IFAC PID12 Plenary Talk

I was honored to be one of the three plenary speakers at the IFAC PID’12 conference. My presentation was scheduled on the last day of the conference, Friday, March 30, 2012. The topic of my talk was PID Advances in Industrial Control. In this presentation I address the fact that major advances have been made …

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