Blog Archives

Automation Direct Field Trip!

Last week I had the privilege of visiting Automation Direct near Atlanta. I was hosted by Chad Crowe, who does online marketing and social media for the company. He contacted me a month or so ago after my post on

Share
Tagged with: , , , ,
Posted in Vendors and Manufacturers

Idec PLCs

Today’s post continues the series on PLC platforms started last year. This is another guest post from Steve Myres, who also wrote an article on Indirect Addressing. Articles in this series include Allen-Bradley, Siemens, Koyo and Panasonic platforms. I wrote

Share
Tagged with: , , , , ,
Posted in Guest Posts, PLCs, Software & Programming, Vendors and Manufacturers

PLC Articles – Software and Hardware

Since I started this blog in early 2011 I have written a lot of articles on PLCs. The PLC is a major part of many industrial facilities and machines, and indeed has been an important part of my career. Now

Share
Tagged with: , , , , , , ,
Posted in PLCs, Software & Programming

Ladder Logic 105 Scanning Solution

Last week I posted a fairly straightforward question at the end of my post on PLC Scanning. I then shared the post on Linked In as well as on my company’s Facebook page. One reason I share these posts on

Share
Tagged with: , ,
Posted in PLCs, Software & Programming

Birth of the Programmable Controller

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!

Share
Tagged with: , , , , , , , , , , , ,
Posted in PLCs

Ladder Logic 305: ASCII and Strings

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

Share
Tagged with: , , , , ,
Posted in PLCs, Software & Programming, The Book

The Difference Between PLCs and Computers

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

Share
Tagged with: ,
Posted in PLCs, Training

PLC Hardware and Programming – Multi-Platform Manual

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.

Share
Tagged with: , , ,
Posted in PLCs, The Course

Advantages of Re-Usable Code

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

Share
Tagged with: , , , , ,
Posted in PLCs, Software & Programming

I Need PLC Pictures!

For the last few months I have been working (slowly) on my new PLC course. Before getting too far into the videos on the Thinkific site, it made sense to me to complete a training manual. Well, I completed the

Share
Tagged with: ,
Posted in PLCs, The Book, The Course

PLC Memory

As I have mentioned previously, I have been working on a generic PLC course that I hope to release in some kind of online software format soon. I was able to test a prototype a few weeks ago with a

Share
Tagged with: , , , , , ,
Posted in PLCs, Software & Programming, The Course

Update on Projects – “Why haven’t you written more posts?”

I have been asked by a lot of readers, friends and associates lately about where I’m at on the various projects I’m involved in. There has also been an undercurrent of “why haven’t you posted lately?”, so I figured I’d

Share
Tagged with: , , , , , ,
Posted in Contribute, Me, PLCs, The Book, The Course, Training, Travel

Ladder Logic 106: One Shots

A one shot, or “differential”, is used to develop a signal that is exactly one scan in duration. As shown in the diagram above, when a signal is applied to a contact (a Pushbutton in the diagram above), no matter

Share
Tagged with: , ,
Posted in PLCs, Software & Programming

PLC Platform Sample Request – CLGX Example

In a post back in March, “Request for PLC Information and Samples“, I received quite a few responses offering PLC information on various platforms. Unfortunately after sending e-mails to quite a few of the respondents I haven’t received any info,

Share
Tagged with: , , , ,
Posted in PLCs, Software & Programming
Categories
Are You the Master of Your Automated Machinery?

Subscribe to Automation Primer!