Control's 10 most-read articles from March 2018

From tips to avoiding PID tuning mistakes to potential system hacking, these were the Top 10 most-read articles on during the month of March 2018.

1. How to Avoid a Common PID Tuning Mistake Tips
In this Control Talk blog, Greg McMillan discusses a common PID tuning mistake: decreasing the PID gain should make a loop with slow decaying oscillations more stable. Read more.

2. Patience has rewards: Top 50 automation companies of 2016
The Top 50 worldwide and North American process control and automation suppliers are making slow, consistent gains with help from the Industrial Internet of Things (IIoT). Read more.

3. Understanding P, I and D
R. Russell Rhinehart helps readers understand what the proportional, integral and derivative terms do within the PID controller. Read more.

4. 2018 Readers' Choice Awards
The 26th Annual Readers' Choice Awards ranks suppliers as indicated by the readers of Control in more than 80 categories. Read more.

5. The electric grid continues to be cyber vulnerable and susceptible to catastrophic impacts
In this Unfettered blog, Joe Weiss the cyber vulnerabilities of the electric grid. He provides a brief history and rationale for why we should be concerned about the cyber threats to the electric grid from Russia, China, Iran, and North Korea. Read more.

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6. OPA Forum expands open, interoperable standard for process control device interfaces - Part 1
Executive Editor Jim Montague explains the Open Process Automation Forum (OPAF) and its effort to develop and implement an open, interoperable process control standard, as well as those who are helping. Read more.

7. Vortex flowmeter calibration and rangeability
Béla Lipták and other experts respond to a question about determining the best size for balancing accuracy against pressure drop. Read more.

8. ARC Forum makes sense of digitalized future
ARC Advisory Group's 22nd Annual Industry Forum took place Feb. 12-15 in Orlando, Fla., and offered attendees useful insights in how to understand, thrive and help others succeed in digital environments. Read more.

9. Criteria and procedure for controller tuning
R. Russell Rhinehart offers a heuristic approach to controller tuning that is fast and can be done with confidence while minimizing upsets. Read more.

10. Fertility Clinic Liquid Nitrogen Incidents – could they have been hacks?
Joe Weiss discusses when failures occur in similar systems at almost the same time and the potential explanation. Read more.