Of network redundancy and PID control

Ethernet, industrial networks, fieldbus, and PID control remain major topics for automation experts.


During the past decade, many articles about industrial networks, Ethernet, and fieldbus have appeared in AppliedAutomation. This issue is no different. And as long as I am editor, that trend will not change. The cover story focuses on Ethernet network redundancy, which the author contends is among the most overlooked issues when planning an industrial network. He writes: "Consider that a communication failure in a production network can create costly downtime, cause the loss of important company data, or even initiate conditions for serious damages to production equipment-or worse: injury to personnel. A redundant physical layer network structure protects against production downtime by ensuring the availability of communication continues, even if errors occur."

The author provides advice on how to apply network best practices via Ethernet network redundancy and offers several protocol scenarios for consideration. "The decision whether to implement a redundancy mechanism in an industrial network and then choose the most appropriate method for the application will be of paramount importance to the ongoing reliability of the network and the overall success of the operation," he writes.

Proportional-integral-derivative (PID) loop tuning is another topic that has appeared frequently in AppliedAutomation, as well as nearly every automation and controls publication. The author writes: "Articles about PID loop tuning are published regularly, and they routinely reference studies touting performance improvements and financial gains. Whether based on empirical research or anecdotal stories, they've made it clear that tuning PIDs can improve a production facility's performance significantly. With such overwhelming evidence, why does the manufacturing community need regular reminders?"

Good question. Perhaps part of the answer is because process modeling and controller tuning technologies continue to advance.

This article appears in the Applied Automation supplement for Control Engineering 
and Plant Engineering

- See other articles from the supplement below.

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Controller programming; Safety networks; Enclosure design; Power quality; Safety integrity levels; Increasing process efficiency
Additive manufacturing benefits; HMI and sensor tips; System integrator advice; Innovations from the industry
Robotic safety, collaboration, standards; DCS migration tips; IT/OT convergence; 2017 Control Engineering Salary and Career Survey
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This article collection contains several articles on how automation and controls are helping human-machine interface (HMI) hardware and software advance.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me