Latest Process Control and PID Technical Articles

Ladder logic is an industrial control systems legend stemming from electrical line diagrams before the days of PLCs.…

Ladder logic is an industrial control systems legend stemming from electrical line diagrams before the days of PLCs. Although logical, they are difficult to interpret.

Learn how to use analog I/O devices with AutomationDirect’s Productivity series of PLCs and Productivity Suite…

Learn how to use analog I/O devices with AutomationDirect’s Productivity series of PLCs and Productivity Suite software. Wiring, configuring I/O, and programming will be a part of this tutorial.

Learn how to measure temperature using an RTD and a temperature transmitter to convert resistance into common analog…

Learn how to measure temperature using an RTD and a temperature transmitter to convert resistance into common analog voltage or current values for process control.

Many sensors, like prox, optical, and ultrasonic, are familiar to control engineers. More and more modern devices are…

Many sensors, like prox, optical, and ultrasonic, are familiar to control engineers. More and more modern devices are incorporating advanced motion profiles requiring motion sensing in many axes.

Converting different numbering systems is quite common in PLCs and structured text codes. Why? Because people read…

Converting different numbering systems is quite common in PLCs and structured text codes. Why? Because people read decimals. Computers read binary. Processors read sets of bits. Not so simple.

It’s important to consider your PLC tag naming convention when using different styles. Learn when and why you might…

It’s important to consider your PLC tag naming convention when using different styles. Learn when and why you might even use more than one, depending on the circumstances and scope of your project.

Have you ever needed to know the temperature, pressure, flow, or other measurement on location, but the readout is way…

Have you ever needed to know the temperature, pressure, flow, or other measurement on location, but the readout is way off in the control room? Here’s an easy way to add a readout in the field.

Function block diagram (FBD) programming is a common language for PLCs following the IEC 61131 standard. What is FBD, and…

Function block diagram (FBD) programming is a common language for PLCs following the IEC 61131 standard. What is FBD, and how does it differ from the familiar ladder logic programs?

Automation can be inexpensive for small projects by using development boards. This article presents a walkthrough of the…

Automation can be inexpensive for small projects by using development boards. This article presents a walkthrough of the setup and installation steps for the popular Raspberry Pi.

Programmable Logic Controllers (PLCs) are designed as an endlessly-looping program, examining all lines of code as…

Programmable Logic Controllers (PLCs) are designed as an endlessly-looping program, examining all lines of code as rapidly as possible. Following are a few critical tips for when programmers only need to run a series of single operations at startup.

Control.com’s Director of Engineering got to explore IO-Link sensors and what he found might surprise you! Although…

Control.com’s Director of Engineering got to explore IO-Link sensors and what he found might surprise you! Although still considered an “emerging” technology, it’s clear IO-Link technology boasts several bonafide benefits over traditional sensors.

Driving motors is one of the most fundamental automation tasks, but understanding and selecting the proper motor soft…

Driving motors is one of the most fundamental automation tasks, but understanding and selecting the proper motor soft starter for your application may require more investigation than you thought.

What are these terms, PLC, PAC, RTU, DCS, SCADA? Why are they so important to industrial robotics and automation? Explore…

What are these terms, PLC, PAC, RTU, DCS, SCADA? Why are they so important to industrial robotics and automation? Explore how each different piece functions to build a comprehensive automated system.

Many articles address the wiring and implementation of analog control signals, but where are they used, and what might…

Many articles address the wiring and implementation of analog control signals, but where are they used, and what might make them a better (or perhaps worse) decision than digital input/output devices?

Digital signals hold a prominent position due to their compatibility with computers. But what are digital signals, and…

Digital signals hold a prominent position due to their compatibility with computers. But what are digital signals, and what are some examples of the various devices used with digital inputs and outputs?

Implementing PID control in a PLC is far more complicated than textbooks would make it appear. There is more to the…

Implementing PID control in a PLC is far more complicated than textbooks would make it appear. There is more to the process than simply picking gain (k) values and calculating an output value.

Temperature profiling is an effective tool to monitor thermal properties in process equipment. This article defines…

Temperature profiling is an effective tool to monitor thermal properties in process equipment. This article defines temperature profiling, discusses the process components, and describes the various benefits it offers.

Process automation relies on precise control systems to operate production equipment for everything from lumber to…

Process automation relies on precise control systems to operate production equipment for everything from lumber to pastries. Using control algorithms produces stable, accurate, and often delicious results.

Is it best to ‘controller scope’ or ‘program scope’ your tags? This is the question asked by many new PLC…

Is it best to ‘controller scope’ or ‘program scope’ your tags? This is the question asked by many new PLC programmers, and it often comes down to personal preference.