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Now You Can Have Robust Data Logging for Free – Part 8

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Now You Can Have Robust Data Logging for Free – Part 1 Now You Can Have Robust Data Logging for Free – Part 2 Now You Can Have Robust Data Logging for Free – Part 3 Now You Can Have Robust Data Logging for Free – Part 4 Now You Can Have Robust Data Logging … Read more

Now You Can Have Robust Data Logging for Free – Part 7

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Now You Can Have Robust Data Logging for Free – Part 1 Now You Can Have Robust Data Logging for Free – Part 2 Now You Can Have Robust Data Logging for Free – Part 3 Now You Can Have Robust Data Logging for Free – Part 4 Now You Can Have Robust Data Logging … Read more

Building a PLC Program That You Can Be Proud Of – Part 2

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In part 1, we looked at writing PLC programs to control a traffic light using discrete bits and timed sequencing using indirect addressing. We will now look at how we can use indirect addressing for inputs and output to control the sequence in the program. Let’s look at an example of controlling pneumatic (air) cylinders. … Read more

PLC Traffic Light Programming: Timer vs Indirect Addressing

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What is the best way to program a PLC?  My answer is simple. The best way is one in which someone can look at your program and understand it. I cannot stress the need for good documentation of your program enough. The best programs are ones that I can return to after several years and … Read more

Here’s a Quick Way to Understand PLC Inputs and Outputs

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The term I/O means Input/Output. I/O can come in two different types; Discrete or Analog. Most people starting out learning about programmable logic controls (PLC) are taught all about discrete inputs and outputs. Data is received from devices such as push-buttons, limit-switches, etc., and devices are turned on such as motor contactors, lights, etc. Discrete … Read more

Here’s a Quick Way to Convert Grey Code into Binary for PLC

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Grey Code Grey Code is used because only one bit of data will change at a time. The following chart shows the conversion of Grey Code to Binary. Number Binary Code Grey Code Number Binary Code Grey Code 0 0000 0000 8 1000 1100 1 0001 0001 9 1001 1101 2 0010 0011 10 1010 … Read more