Control Engineering hot topics, September 2017
Hot topics in Control Engineering, for September 2017, included PID, ladder logic, differential pressure flowmeters, cloud computing, and process sensors. These are based on the top 10 most read articles online in Control Engineering September. Links to each article below.
The venerable proportional-integral-derivative (PID) algorithm can solve a variety of feedback control problems, but not all.
The auto cycle command in ladder logic allows the auto cycle to start in auto mode if no faults are present and for the cycle to stop only when the auto sequence has not been started.
The square root for differential pressure-(DP-) based flow can be taken either in the transmitter or in the controller and its easier to configure the transmitter to take the square root because, on the low end, a very small change in DP results in a large change in flow.
Best practices for programmers include defining their structure, knowing the system resources and tools, consistency, and keeping track of changes during a project.
Cloud computing can process, filter, and analyze data using an HMI that can then be turned into actionable information for industrial facilities.
The Control Engineering RCEP webcast, “Choosing sensors for the application,” resulted in more questions than speakers had time to answer in the allotted time. Here each speaker provides more answers.
To minimize worker injuries and incidents, look at existing workflows to assess the degree of risk and identify areas of concern. Then form specific and targeted interventions that can address these gaps.
System integration via the cloud makes networking at the production level easy and secure by vertically integrating management and systems as well as providing a security function for Industrie 4.0.
Open-loop controls and closed-loop controls each have unique situations where they are needed and the operator needs to know the setting and the situation before deciding on which one to use.
Identifying missteps such as not building a cross-functional team and not defining responsibilities early in a project can help ensure that a control system automation project is successful.
The list was developed using CFE Media’s web analytics for stories viewed on controleng.com, September 1-30, for articles published within the last two months.
On Mondays, see the top 5 articles of the prior week. In January, see the hot topics for the prior year.
Chris Vavra, production editor, CFE Media, firstname.lastname@example.org.