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! …
In today’s post I’m going to ask you to think of sensors in a different way. Most engineers who are specifying equipment think of sensors as discrete or analog devices, proxes or photoelectrics, flow or pressure sensors, thermocouples and the …
When I got up this morning, I had fully intended to write a post on sensors and sensing techniques. I was even going to title it “Sensors 101”, similar to the series that I started on PLCs several years ago. …
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 …
What makes a PLC different from a typical computer? After all, computers are used to control things, they can even run a software PLC. This short video is part of the introduction to a new training course I am producing …
Hello from mushy Sacramento, CA. Flying in this afternoon the whole area looked like a big sponge, everything looked flooded out, and its still raining. And I thought there was a severe drought here… ********************************************** Most people have heard this …
In these days of online access to any product you can think of, it seems like your best option for buying technical products is to just find the best price and play vendors off against each other. I get offers …
Well, its that time again where people around the world review the last year and make plans for the new one to come. While this can be done at any time of year, people often choose this particular day to …
As many of you know, for the past three years or so I have been teaching PLC, HMI and SCADA classes for Automation Training, a Canadian company. During that time I have visited many places and met a lot of …
Over the past few months I’ve mentioned that I am working on a new online course for PLC’s. Almost a month ago I posted a request for pictures due to some of the publisher restrictions on that sort of thing. …
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