AutoQuiz is edited by Joel Don, ISA's social media community manager.

Today's automation industry quiz question comes from ISA's new course, PLC Fundamentals for the Technical Professional. This course focuses on the role the programmable logic controller plays in the design of a control system and how proper selection, installation and maintenance can reduce operating costs and improve performance. It provides the technical expertise necessary to install, perform routine programming and maintenance and apply proper troubleshooting and configuration techniques.

Which of the standards listed below describe the guidelines for programming a programmable logic controller?

a) IEC 61511-3
b) IEC 61131-3
c) IEC 61508-3
d) IEC 63111-3
e) all of the above

The IEC 61131-3 standard establishes guidelines for the use of ladder, function block, instruction list, structured text and sequential function chart programming for the programmable logic controller industry.

The correct answer is B.

About the Editor
Joel Don is the community manager for ISA and is an independent content marketing, social media and public relations consultant. Prior to his work in marketing and PR, Joel served as an editor for regional newspapers and national magazines throughout the U.S. He earned a master's degree from the Medill School at Northwestern University with a focus on science, engineering and biomedical marketing communications, and a bachelor of science degree from UC San Diego.

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