Simple Ladder Pulse
This morning I had someone send a ladder diagram on a dry-erase board with an attempt at creating a 10 second pulse to dispense something. It was much more complex than it needed to be and I tried to explain …
Category: Controllers
PLCs, Computer control, DCS Systems, Microcontrollers
Beckhoff Video
This was last week’s Mastering the Machine video on the Beckhoff PLC platform and TwinCAT. I am working on the programming part, it should be out in a few weeks. If you want a copy of the document I showed …
PLCnext Webinar
Friday, November 19, 2021 was the one year anniversary of the Automation Academy, my system integration training website! I do these webinars every two weeks as live Zoom events, part of the Academy’s events. This webinar was on PLCnext, Phoenix …
Webinars and YouTube
This is the latest Mastering the Machine video on YouTube, I have been doing these every two weeks for almost a year now. The topic was Pi-Plates and NodeRED and as usual I learned a lot from my guest, Jerry …
Ladder Logic 309: Allen-Bradley DDE/OPC Link to Excel
It’s been a while since I’ve added to the Ladder Logic series, so this post serves several purposes. It serves as the 7th video in the ControlLogix Odyssey series, it will be posted on YouTube as an ad, and it …
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The Case for Ladder Logic
Lately I have seen a lot of posts promoting Structured Text on forums and Linked In. Structured Text is one of the 5 (or 6) standard PLC languages described in IEC 61131-3. While I have used ST in the past …
More Fun with Enclosures
Two days before the tornado in March, I wrote a post about the enclosures I planned to market as part of my PLC training kit. With all of the turmoil and working out of my house for a few months, …
Ladder Logic 404: VFD Encoder Control/Siemens
Today’s post doubles as a Ladder Logic series post and an introduction to the last videos in the Siemens Step 7 Odyssey series on my YouTube channel. Last week I covered a bit about how a Variable Frequency Drive interfaces …
Videos and Online Training
As I’ve mentioned in my last few posts, I’ve been creating a lot of videos lately, and have been working on various online courses. The picture above is a Camtasia (the software I use for video editing) screen shot of …
Ladder Logic 309: Allen-Bradley Produced-Consumed Tags (Video)
Today’s post is a continuation on Jason Lafever’s questions on PLC to PLC communications. PLCs often have a need to send messages to each other, and all have some method of directly sending a message to read or write tags …
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