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 …
Category: Hardware
Mechanical and electrical hardware
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, …
Request for PLC Information and Samples
I mentioned last week that I am working on what I believe is the first truly advanced non-platform-specific book on PLC Programming. My friend Tony over on Factory Automation Software Blog has reviewed some books that come the closest, but …
Ladder Logic 402: Data Manipulation and Filtering
In last weeks’ post, I discussed acquiring data using a PLC to capture values from an analog card. I showed some fairly straightforward methods of capturing data using FIFO methods, averaging data values, and how some of the ladder logic …
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Ladder Logic 401: Data Acquisition and Analysis
Todays post is in response to a request by Quy Phan, who I met a couple of weeks ago while teaching for Automation Training in San Diego. He is having some problems with some existing equipment concerning noise on his …
Beckhoff Automation
I’ve written a few posts on controls platforms, notably on Allen-Bradley, Automation Direct/Koyo, and Siemens. A couple of friends have written guest posts on Idec and Panasonic. I am still hoping to get some contributors to write articles on GE, …
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 …
Ladder Logic 105: PLC Scanning
In my last post on PLC Memory Organization, I mentioned that I had not really covered how scanning actually works in a programmable controller. This is certainly a topic that needs to be discussed for an understanding of PLC programming, …
Ladder Logic 104: Memory Organization
One of the first decisions that needs to be made when designing a PLC system is memory allocation and organization. In the early years of the PLC memory came at a premium… 1K (one kilobyte) of memory for the program …
Important Facts About Actuators
Today’s article is a guest post by TiMotion, an electric linear actuator manufacturer. ********************** Get The Essential Facts About Actuators Don’t make the mistake of buying a robot when a simple actuator will do. Robots have become the “go-to” tool …