Latest HVAC Technical Articles

Whether working with measurement tools or process controllers, it is important to recognize faulty display values and the…

Whether working with measurement tools or process controllers, it is important to recognize faulty display values and the best ways to fix them.

Understanding the building blocks of s-domain analysis and magnitude response theory can go a long way in helping…

Understanding the building blocks of s-domain analysis and magnitude response theory can go a long way in helping engineers predict how and why some system design choices are made over others.

User-defined data types (UDTs) are a powerful and useful tool when applied to their full advantage. However, misused,…

User-defined data types (UDTs) are a powerful and useful tool when applied to their full advantage. However, misused, they can become problematic and introduce roadblocks to troubleshooting and upgrading PLC programs.

Programmable encoders provide engineers real flexibility to adjust process parameters. From operating theory to…

Programmable encoders provide engineers real flexibility to adjust process parameters. From operating theory to programming methods, here’s everything you need to know to begin leveraging these handy devices.

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?

Using the right motor for the right task is critical - but what happens if the motor is connected to the wrong supply? It…

Using the right motor for the right task is critical - but what happens if the motor is connected to the wrong supply? It is never recommended, but important to quickly understand symptoms of incorrect wiring.

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?

Single-phase motors are common in household and small industrial devices. They are a bit more complex than 3-phase…

Single-phase motors are common in household and small industrial devices. They are a bit more complex than 3-phase models, so it’s important to recognize failure modes and common symptoms.

Structured Text (ST) is one of the common IEC programming languages that can be used in programming PLCs. Learn how to…

Structured Text (ST) is one of the common IEC programming languages that can be used in programming PLCs. Learn how to use structured text to write executable programs for MELSEC’s FX series PLC.

Three-phase motors are a backbone of the modern industrial control landscape. But plenty of applications still rely on…

Three-phase motors are a backbone of the modern industrial control landscape. But plenty of applications still rely on single-phase motors. Can these types of motors be reversed, and if so, how?

An introduction to the various tag types used within one of the leading supervisory control and data acquisition (SCADA)…

An introduction to the various tag types used within one of the leading supervisory control and data acquisition (SCADA) software powering IIoT, HMI, and I4.0 applications: Ignition by Inductive Automation.

Variable control allows external conditions, like temperature, to be monitored so the controller can activate devices to…

Variable control allows external conditions, like temperature, to be monitored so the controller can activate devices to heat or cool the system as needed. Simulate a temp controller with low-cost components!

We see smoke detectors on a daily basis in every house and building we visit, but the same sensor elements, and others,…

We see smoke detectors on a daily basis in every house and building we visit, but the same sensor elements, and others, can be used to detect the presence of harmful gasses and heat in all industries.

Designing, installing, and maintaining control systems involves a lot of wires. Each wire has a purpose, often indicated…

Designing, installing, and maintaining control systems involves a lot of wires. Each wire has a purpose, often indicated by the color of the insulation. But what are the common colors, and what do they mean?

Vibration sensors measure the mechanical vibration of an object, making it possible to monitor machines for early signs…

Vibration sensors measure the mechanical vibration of an object, making it possible to monitor machines for early signs of failure to prevent costly and dangerous breakdowns.

AutomationDirect’s Productivity line of PLCs is known for cost-effectiveness and ease of use. Learn how to build and…

AutomationDirect’s Productivity line of PLCs is known for cost-effectiveness and ease of use. Learn how to build and download a simple program using discrete input and output ladder commands.

Engineering processes like robotics, feedback control, and security systems rely on position and distance sensors to…

Engineering processes like robotics, feedback control, and security systems rely on position and distance sensors to provide real-time information that enables machines to operate accurately and safely.