Top Control Engineering articles, June 2012

The most-visited articles at during June 2012 included articles on HMI and PLC integration, video game influences on HMI design, motor-driven systems efficiency update, wireless instrumentation video, and tutorials on thermowells and boiler drum level controls, among others.


Most-read Control Engineering online articles for June 2012 at included articles on human machine interface (HMI) and PLC integration, video game influences on HMI design, motor-driven systems efficiency update,  wireless instrumentation video, and tutorials on thermowells and boiler drum level controls, among others. More about each article and links follow.


Integrating HMIs with PC-based control is also a growing trend. The concept of a soft PLC built into an industrial PC can provide much versatility, Courtesy: Siemens.Integrated HMI/PLC packages offer convenience, but only in the right applications

Choices of controllers that include an integrated HMI in one package are growing. These promise greater simplicity if the combination of elements works in your situation.



Video game or HMI?

Industrial HMI developers consider how video game technology can change the way operators work with control systems. Video: ABB demonstrates some interesting possibilities.



Interior permanent magnet (IPM) motors are one of many solutions to motor efficiencies above premium levels. In a cooling tower fan application, this direct-drive IPM motor (and adjustable-speed drive) eliminated a worm-gear reducer used with a two-speedMotor-Driven Systems Efficiency Update

Electric motors have received predominant attention from energy-efficiency standards and regulations due their vast industrial usage and well-documented design, performance, and test specifications.



Wireless Instrumentation: Do We Need To Be Concerned About The Protocol?

It’s difficult to say what convergence of competing protocols will mean for wireless instrumentation users. See video.


Figure 1: Flow around a thermowell Courtesy: ABBBack to Basics: Thermowell protection

Thermowells, while protecting temperature sensors from a process fluid, can undergo tremendous stresses. A new standard is designed to lower risk of failures.



Optimizing Strategy for Boiler Drum Level Control

Avoid Trips And Maximize Steam Output By Reviewing Your Control Equipment, Strategy, And Tuning.



Wireless Bluetooth Low PowerLow energy Bluetooth wireless protocol

Bluetooth Low Energy technology is a whole new technology that can benefit industrial communications.



FROM THE ARCHIVES: Managing the risk of arc flash

Understanding the data and the standards for a deadly plant danger.



Think Again: Control Engineering Secrets

If there were a state of Control Engineering, everything in that state would be top secret. Here’s why.



Making good motor decisions

Correct motor sizing is critical for maximum efficiency, as is making the right rewind-versus-replace determination.



Additional most-read online articles include:

Moving up from hardwired relay logic


- Top Control Engineering articles, May 2012


 - Safety control systems: Essential considerations, costs


 - Challenges of Motor Selection and Sizing


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- Compiled by Mark T. Hoske, CFE Media, Control Engineering,

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