As you all probably know, field startups can be quite stressful. Did the equipment arrive on time and with all needed components? Has the site prep work been completed? Are all needed personnel and permits on site? Where are my plane tickets? Do I need to rent a car? What about hotel reservations? With all that…
You’ve probably seen some seemingly well-designed machines rendered unsafe because plant operators disabled safety switches. I know I’ve encountered such situations, and it’s our responsibility as engineers and designers to address this issue
I’d be willing to bet that the majority of you have come across temperature sensing in some way throughout your industrial automation career. Any takers? I’ll give you 3-to-1 odds! You’d be smart not to take that bet since temperature is one of the most measured parameters in automation. But how does it work? How…
Learn how to automate a particular function, brush up on an automation topic or just pick up a few tips and tricks to make your life easier and save time and money. You’ll find it in the Automation VIDEO Cookbook from AutomationDirect. The initial release of the Automation VIDEO Cookbook has four chapters: Temperature Sensing – RTDs…
PLC Definition Programmable Logic Controllers (PLC) are often defined as miniature industrial computers that contain hardware and software used to perform control functions. More specifically, a PLC would be used for the automation of industrial electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or food processing. They are designed for multiple…
The PLC or Programmable Logic Controller has revolutionized the automation industry. Today PLCs can be found in everything from factory equipment to vending machines, but prior to New Year’s Day 1968 the programmable controller didn’t even exist. Instead what existed was a unique set of challenges that needed a solution. In order to understand the…
What controls you? No, I’m not talking about your boss, your spouse or the government. Instead, think of your body as an industrial control system. Now, what controls you? Hopefully, you said your brain, although the heart is an acceptable answer sometimes. But for now, let’s focus on the brain and the nervous system as…
One of the biggest factors in any PLC buying decision is the capability of the programming software. How easy is it to use? What does it offer? PLC hardware is only half of the equation, and who wants to buy a controller only to find out the software is lacking the basics? No thanks! So,…
In Understanding Ladder Logic we touched on the origins of Ladder Logic, its structure and execution. So now that we have a understanding of what Ladder Logic is, we can dig a little deeper into how ladder instructions work. And to do that, we need to first understand Boolean math and logic gates. Now, this blog…
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Ladder Logic in Action
Ladder logic programming for industrial controllers has evolved significantly over the years, and now supports advanced functionality such as process control, motion control, data manipulation, networking, and data acquisition. However, when you start with a blank page to design a new control system, large or small, there are many basic functions this tried-and-true language is…