Tag: PLCs

Hello all, I know its been a long time since I last posted, a lot going on here. Most importantly, my new book, Advanced PLC Hardware and Programming, is officially on sale! Final edits were done last week, and the …

Advanced PLC Hardware and Programming Read More »

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Today’s post relates to a new method I am using to teach some of my advanced classes. In a basic PLC training class, pushbuttons and pilot lights built into a trainer are used to complete exercises, usually in order to …

Ladder Logic 306: Simulation Read More »

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This post is another guest post from MRO Electric. I thought it was an interesting topic. ************************************************************************ PLC Security In The Heating Industry: Keep Your Friends Close, and Your Enemies Closer No one understood or more succinctly described strategies and …

PLC Security 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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This post is another in my series on Ladder Logic. As with the other posts in this series, I am using generic logic and addressing so that it can apply to various PLCs. In previous posts in this series I …

Ladder Logic 209: Faults and Messages Read More »

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I just got back from teaching a class in California using the conveyor and training demo mentioned in my previous post on Automation NTH. I have discussed training quite a bit on this blog before, but I feel like this …

Advanced PLC Training using Industrial Equipment Read More »

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Today’s post is a continuation of the series on PLC Ladder Logic I started several years ago; for more of these post click on the PLC tab at the top of the site. In particular this continues my discussion of …

Ladder Logic 208: System Routine 2 Read More »

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Today’s post, as promised last week, is written by Ryan McCarthy, a reader of this blog. While I always offer to place a reciprocal link to the website of whoever contributes guest posts to this site, amazingly Ryan is neither …

Unitronics Read More »

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Today’s post is extracted from my new “generic” PLC course manual, PLC Hardware and Programming – Multi-Platform. In the manual, I also cover the origins of the computer, beginning with the Babbage Analytical Engine, all the way back in 1823! …

Birth of the Programmable Controller 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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