Voices: Feedback

Reader Feedback: Not Exactly PC-Based

PLCs and PACs Are More Robust and Include More Control Capabilities Than Those Offered Through PC-Based Control

By Dan Malyszko

I worked with Noosa Yoghurt to implement the process control solution discussed in the June article, "Process Automation, Controls Boost Production at Yogurt Plant ." While most of the details on the application are accurately described within the article, this particular application does not use PC-based control. Noosa uses a Rockwell Automation PlantPAx process control system built on a server and thin-client architecture. The actual control resides within a programmable automation controller (not a PC), despite how it's referenced in the article.

In my experience, PC-based control takes the control functions found on a programmable controller, encapsulates them in software and executes program tasks and I/O communications on the PC's processor along with other overhead related to the host operating system.

PLCs and PACs, on the other hand, are more robust and include more control capabilities than those offered through PC-based control. These could include motion control, integrated safety and advanced PID process control. At Noosa, the PAC-based PlantPAx platform provides the ability to add additional I/O, controllers and servers without adversely affecting the base characterized architecture of the system. This flexibility would not be possible within a PC-based system.

Dan Malyszko
Director of Operations, Malisko Engineering Inc.
dmalyszko@malisko.com

More from this voice

Title

IT versus ICS

If You Really Want Folks Involved in ICS Security They Need a Safe Place to Learn

06/10/2013

More on Fukushima

Harry Forbes Disagrees with Bela Liptak's Automation Could Have Prevented Fukushima Article. Find Out Why

06/10/2013

Reader Feedback: Who's the Boss?

Google Doesn't Respect Authority. Google Search Results Are Only a Reflection of the Respect Granted by Others

05/01/2013

Automation and Fukushima: Not So Fast

A Reader Responds to Liptak's Article on Fukushima Saying That We Have No Reason to Suspect That the Instruments Did Not Operate Correctly. Liptak Responds

05/01/2013

Reader Feedback: Cybersecurity Risk

When Will the Government Take Cybersecurity Risks Seriously?

04/02/2013

Reader Feedback: Basic PID and Control Issues

Voices From the ControlGlobal Community...Our Readers Talk About PID

04/02/2013

Reader Feedback: Long-Distance Calibration

A Reader Writes In to Tell Us That the Users We Quoated in an Article Are Not Considering the Latest Technology Presented at an ISA International Instrumentation Seminar

04/01/2013

Reader Feedback: When Will There Be an App for That?

A Reader Asks Us When Will We Have an App for iPad

03/06/2013

Reader Feedback: Wired vs. Wireless

A Reader Tell Us About Powerline Communication

03/05/2013

Reader Feedback: Process Safety

Sometimes Even the Best Maintenance Practices Fail to Manage to Keep Some of These Plants Safe

03/04/2013

Thoughts on Without Wires

Wireless Is Used Instead of Doing Nothing at All or Doing It Manually

01/30/2013

Reader Feedback: Consider These for The Top 50 Automation Companies

Readers Asks Us to Consider Balluff, Sick (Optical Sensing Products) for Our Top 50 Automation Companies

01/01/2013

Feedback: Not All Digital Transmitters Are

One of Our Readers Takes Issue With the Reference to Manufacturers' "Digital Transmitters" in Rezabeck's Latest Article. See Why

12/03/2012

Feedback: Wireless Is Easy-Peasy

A Readers Writes In to Tell Us He Is Perplexed at the Perception of Wireless. Read More to Find Out Why

12/03/2012

Twitter Time Well-Spent

Using Twitter to Listen and Discover New Things Is Time Well Spent

10/02/2012

One Page Short of a Story?

Why Would You Not Mention the Most Popular Meters That Measure Both Area and Velocity?

10/02/2012

Securing Control Systems in Cyberspace

One of Our Readers Says That Even the ISA99 Memeber Will Say It Is Hard to Quantify Security From Their Security Access Level (SAL) Work

10/02/2012

Technology: Keep the Print

Don't ever Kill the Magazine

08/27/2012

Wireless a Matter of Choice

End Users Get to Choose Which Protocol Meets Their Needs the Best

08/27/2012

Help Wanted

Reader Tells Us We Were On the Mark Regarding the Current Job Market

08/03/2012