Top 5 Control Engineering articles October 10-16: PID velocity, level instruments, small-scale automation, more

Articles about PID velocity, 2017 Engineers' Choice finalists, choosing the right level instrument, ladder logic, and small-scale automation projects were Control Engineering’s five most clicked articles from October 10-16. Miss something? You can catch up here.


The top 5 most read articles online, from Oct. 10-16 for Control Engineering, covered PID velocity, 2017 Engineers' Choice finalists, choosing the right level instrument, ladder logic, and small-scale automation projects. Also see what ranked 6-10 over the last month. 

1. The velocity of PID 

Inside Process: Proportional-integral-derivative (PID) theory is best introduced as the familiar second order differential equation via the velocity form instead of the more traditional positional form. 

2. 2017 Engineers' Choice Finalists

For a limited time, the official Engineers’ Choice ballot is open for voting for Control Engineering North American print and digital edition subscribers. Vote for the best Engineers’ Choice finalists of 116 entries across 28 categories.

3. How to choose the right level instrument for applications

There are many level measuring techniques, however they need to be the right fit for the application. See the three key constraints to measuring solids in tanks and vessels.

4. Ladder logic 106: One shots

Different programmable logic controller (PLC) manufacturers use one shots to develop a scan that is exactly one scan in duration and can be generated from the rising or falling edge of the signal.

5. Small-scale automation projects

How to get past time, money, and resource issues when executing small projects and specifying automation equipment and components.

The list was developed using CFE Media's web analytics for stories viewed on, October 10-16, for articles published within the last two months.  

Chris Vavra, production editor, CFE Media,

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