Automation.com recently published an article on IEC 61131-3 and PLCopen. The article “No-Code Industrial Control Programming Basics” was written by Bill Lydon, the Director of PLCopen North America and can be found at: http://www.automation.com/en-us/articles/february-2022/no-code-industrial-control-programming-basics?listname=Automation%20&%20Control%20News%20&%20Articles