There is a number of scenarios one can create to test PLC Programmers. One of the most simple, yet challenging for a beginner, questions is the famous motor starter. A simple system which utilizes two buttons and an output stumbles those who’ve little to no experience with PLCs. Furthermore, this question will reveal if the candidate asks the right questions, makes the correct assumptions and is able to reason through a simple assignment presented to him.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/plc-interview-questions-building-a-2-button-motor-starter-system