Today’s post is another guest article, this one written by Steve Myres. Steve owns Automation Solutions, a controls integration company that also provides machine mechanical, electrical, and fluid power troubleshooting and design. ************************************************************ Dynamic addressing In this article, I’ll describe …

Dynamic (Indirect) Addressing Read more »

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This post is both an update on the status of “My Little Factory” and an article on some new fun trainers that I am working on. As you can see in the above picture, all of the hardware for the …

Hands On Training Equipment Read more »

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Today’s post is in answer to a question from Bruno on my last post on Faults and Messages. Bruno asks “If two faults happen at the same time, will this procedure work?” This is a more complex question than it …

Ladder Logic 403: Message Scrolling and Multiple Faults Read more »

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Today’s post covers ASCII, string manipulation and how to deal with readable text in a PLC. The picture above is from a ControlLogix program (Allen-Bradley, RSLogix5000 v.16) I wrote back in 2006. The program communicated with a PC-based Cognex machine …

Ladder Logic 305: ASCII and Strings Read more »

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Recently I’ve seen some good discussions on PLCs (Programmable Logic Controllers) vs. PACs (Programmable Automation Controllers), and it got me thinking about what really differentiates the two. Some have said that it is having a more powerful processor, or more …

Advantages of Re-Usable Code Read more »

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