Practical Tips and Techniques
We will now look at the secret of using timers in the PLC. Timers are used in the majority of PLC programs. There are also a wide variety of off-the-shelf industrial timers that you can use. The implementation of timers can be vast; however, it all starts with a TIMING CHART. Timing Chart – Secret … Read more
I recently went to a seminar on lubrication basics. Mike Deckert of Flo Components Ltd presented this. So why talk about Lubrication on an industrial automation website? Lubrication is vital in maintaining uptime on equipment. It is often thought of near the end of most automation projects, but it should be a principal component of all … Read more
Here’s a Quick Way to Wire NPN and PNP devices I often get asked how to wire NPN and PNP devices to the programmable logic controller. This can be unclear at first when looking at the wiring diagrams. I have managed to destroy a few sensors in the process….. so let’s get started, and I … Read more
Looking at a stop-start jog circuit in the PLC will help us understand the differences in hard-wiring the circuit and programming. Basic Start Stop Circuit Let’s start with the primary start-stop circuit. Here is what it looks like hard-wired. (Physical switches wired to outputs devices, such as motor contactors and relays.) When the start pushbutton … Read more
I am adjusting for daylight saving time (DST) in Do-More PLC. When does daylight savings time (DST) start and end? On the first Sunday in November, areas on Daylight Saving Time return to Standard Time at 2:00 am local time. Canada Daylight Saving Time begins at 2:00 am local time on the second Sunday in … Read more
Now You Can Have Robust Data Logging for Free – Part 12 HTML and Scripting Languages We have the following accomplished: PLC program Visual Basic Program Data collected in a Database IIS web service established ASP Script Written Let’s take a closer look at the ASP Script ( AccRL.asp) that was written in part 11: … Read more
