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A Hands-on Walkthrough of MQTT Protocol Using the paho-mqtt Open Source Library

A Hands-on Walkthrough of MQTT Protocol Using the paho-mqtt Open Source Library

No more IIoT buzzwords! This article aims to walk through an implementation of MQTT using the paho-mqtt library using nothing more than your local machine and some simple Python programming.


Leveraging IIoT and Energy Measurement Tools for Machine Optimization

Leveraging IIoT and Energy Measurement Tools for Machine Optimization

Analytics from data algorithms can predict machine failures and provide diagnostics—but what should we measure? Then, once the information has been collected, what trends might point to problems?


Understanding the OPC Unified Architecture (OPC UA) Protocol

Understanding the OPC Unified Architecture (OPC UA) Protocol

Learn about the history, framework, and current uses of the Open Platform Communications United Architecture (OPC UA) communication protocol in industrial automation.


What’s This Standardized Code for Information? Funny You Should ASCII

What’s This Standardized Code for Information? Funny You Should ASCII

ASCII is a familiar acronym, found in applications like Modbus communications and string data types—but what is it, and what does ASCII mean for automation engineers?


Cybersecurity for Industrial Control Systems

Cybersecurity for Industrial Control Systems

Cybersecurity is all about processes and people. A lot of threats can be mitigated through technology, but only if people understand how cybersecurity affects control systems and related technology.


Fundamentals of Grounding in Industrial Automation and Control Systems

Fundamentals of Grounding in Industrial Automation and Control Systems

The subject of grounding in electronics is broad and complex, spanning across a variety of functions and objectives. In this article, we will investigate the applications and regulation of grounding in control systems on a fundamental level.


The Basics of Optical Sensors and Common Types

The Basics of Optical Sensors and Common Types

Optical sensors are one of the most popular sensor types in industrial automation. This article covers optical sensor basics and commonly used types, including fiber optic, photoelectric, and optical encoders.


Understanding Thermal and Pressure Safety Valves for Fluid Flow Systems

Understanding Thermal and Pressure Safety Valves for Fluid Flow Systems

Safety is a concern in any system containing potential energy, whether electrical, chemical, or fluid. Each has methods of protection, and for fluid systems, certain shutoff valves are used in situations when excess pressure can be a problem.


Field-oriented Control (Vector Control) for Brushless DC Motors

Field-oriented Control (Vector Control) for Brushless DC Motors

Field-oriented control (FOC), also called vector control, can control 3-phase alternating current motors and brushless DC motors. Read more to learn its advantages, how it works, and its best applications.


Introduction to Industrial Sensors

Introduction to Industrial Sensors

Industrial sensors can be found in nearly every modern industrial process, regardless of complexity. Learn the history, evolution, and variety of sensors that make manufacturing the modern marvel we see today.


Inrush Current: Why Is Motor Startup Current So High?

Inrush Current: Why Is Motor Startup Current So High?

Motors consume the highest current during startup—this is a well-known fact. But logically, the slowest speed should relate to the lowest power consumption. Why, then, is inrush current so high for motors?


Addressing Common Industrial IoT Cybersecurity Risks For Control Systems

Addressing Common Industrial IoT Cybersecurity Risks For Control Systems

Addressing cybersecurity threats introduced by IIoT technology and devices can quickly seem overwhelming. However, an understanding of the risks can lead to some straightforward countermeasures.


Siemens TIA Portal and S7-1200 Tutorial 2: Analog Inputs

Siemens TIA Portal and S7-1200 Tutorial 2: Analog Inputs

Programming simple coil and contact commands is an easy matter in most PLC IDEs. Connecting and configuring analog inputs can be more challenging with various bit resolutions and conversion commands.


Understanding Controller Memory Types and Conservation

Understanding Controller Memory Types and Conservation

Insufficient controller memory can result in reduced HMI and SCADA response speed and longer scan times. Know the differences between RAM, ROM, and removable memory, and how to keep program sizes in check.


An Engineer Explains the Hexadecimal and Octal Number Systems

An Engineer Explains the Hexadecimal and Octal Number Systems

Computers understand values as long strings of binary bits, but we humans convert them to other systems for convenience. Decimal makes sense, but what about hexadecimal and the lesser-known octal systems?


Introduction to Basic Three-Phase Motor Control Circuits

Introduction to Basic Three-Phase Motor Control Circuits

Large motors require a circuit to turn on and off. This may be as simple as a single on/off drum-type switch or as elaborate as a VFD unit. Learn about some common control circuit designs for typical three-phase motor requirements.


How IIoT can Benefit Maintenance Practices and Increase Overall Equipment Effectiveness

How IIoT can Benefit Maintenance Practices and Increase Overall Equipment Effectiveness

As data becomes available, maintenance can shift from being done on a rigid schedule to a more cost-effective plan of fixing as required, even turning attention to the root cause of maintenance woes.


Combatting the Effects of EMI with EMC Design Principles for Electrical Panels

Combatting the Effects of EMI with EMC Design Principles for Electrical Panels

EMC-compliant panels are an excellent first step in reducing electromagnetic interference from industrial control systems. Learn about some features of electromagnetic compatibility in panels.


Basic Concepts of Pneumatically Powered Air Motors

Basic Concepts of Pneumatically Powered Air Motors

Air motors are common in process industries, mainly used in hazardous areas. This article introduces the features and working principles of air motors and the differences between air and electrical motors.


Understanding Power Quality, Monitoring, and Correction  

Understanding Power Quality, Monitoring, and Correction  

Power quality is an increasing concern for manufacturers all over the world as electrical equipment becomes more advanced and therefore sensitive to discrepancies in the supplied power.