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Introduction to Modbus and Modbus Function Codes

Introduction to Modbus and Modbus Function Codes

Modbus is one of the oldest industrial communication protocols still in use today. Continue reading to find out how the protocol works and how to use it for monitoring and control.


Rockwell’s Studio 5000 and Analog I/O Tutorial 2

Rockwell’s Studio 5000 and Analog I/O Tutorial 2

Learn how to install and program analog modules into Rockwell’s hardware and software environments using a CompactLogix PLC and Studio 5000.


Not Just Another IIoT Article: MQTT for Pneumatic Cylinder Maintenance

Not Just Another IIoT Article: MQTT for Pneumatic Cylinder Maintenance

IIoT is a daunting topic due to ambiguous interactions of hardware and software. This article outlines the basic steps to use an MQTT broker to collect the number of cycles from a pneumatic cylinder for PM software.


How To Know When Predictive Maintenance Isn’t An Ideal Solution

How To Know When Predictive Maintenance Isn’t An Ideal Solution

To know if predictive maintenance is the right strategy, it might help to first recognize if it isn’t. Here are some indicators that your organization should improve before implementing predictive maintenance.


Intro to PLC Programming with Rockwell’s Studio 5000 and CompactLogix

Intro to PLC Programming with Rockwell’s Studio 5000 and CompactLogix

Rockwell Automation is known for being one of the most popular PLC brands, supported by many compatible devices. Learn the basics of getting started with a CompactLogix project in the Studio 5000 environment.


Safety Devices - The When, How, and Why

Safety Devices - The When, How, and Why

Machine safety design can be a daunting task with all the different safety devices on the market today. Choosing the correct device for your design can be made easier by understanding when to use the proper device.


Comparing Parallel Circuits: Practical vs Theoretical Electrical Systems

Comparing Parallel Circuits: Practical vs Theoretical Electrical Systems

We are taught that parallel circuits maintain equal voltage across all branch resistors, equally sharing the source voltage. But reality is often far from ideal, and individual devices certainly impact the rest of the circuit.


Introduction to Network Switches for Industrial Applications

Introduction to Network Switches for Industrial Applications

Industrial network switches connect automation equipment, controllers, and other such devices. Learn about unmanaged, managed, and PoE enabled switches, as well as the differences between switches, routers, and hubs.


Memory: A Challenge on the Road to Industry 4.0

Memory: A Challenge on the Road to Industry 4.0

Memory for data is among the most pressing challenges to Industry 4.0. Given the evolving nature of Industry 4.0 and associated memory solutions, however, some memory-based trends are becoming apparent.


What’s the Difference Between a Safety Contactor and a General Purpose Contactor?

What’s the Difference Between a Safety Contactor and a General Purpose Contactor?

Designing a system with motor motion always includes a consideration of safety. Incorporating safety contactors might be the correct prevention to protect equipment and users but may add additional challenges.


Arduino PLC IDE Tutorial 2: Analog I/O and External Devices

Arduino PLC IDE Tutorial 2: Analog I/O and External Devices

Previously, we described how to use the new Arduino PLC IDE to control discrete devices. This tutorial will describe how to connect various peripheral equipment (VFD and robot) using analog inputs and outputs.


Power Supplies: Understanding the Differences Between Linear and Switching

Power Supplies: Understanding the Differences Between Linear and Switching

Linear and switch-mode power supplies provide direct current to power control components and electrical devices. Learn about the differences between the two power supplies and which one is best for your control system.


Electronic Datasheet (EDS) Files: Why do We Use Them?

Electronic Datasheet (EDS) Files: Why do We Use Them?

Many control product manufacturers offer these downloadable ‘EDS files’ for peripheral equipment, but what exactly is an EDS, and how can they aid in the development of a project?


Teardown: What’s Inside a Timer Relay?

Teardown: What’s Inside a Timer Relay?

PLCs and microprocessors have largely replaced timing functions in control circuits. But these timer relays still hold many necessary tasks. What’s inside these devices might be more complex than you imagined!


How To: Use the Arduino PLC IDE to Build Basic Ladder Diagrams

How To: Use the Arduino PLC IDE to Build Basic Ladder Diagrams

Following the release of the official Arduino PLC IDE, this tutorial will introduce programming and understanding of the function blocks common to all IEC 61131 languages, starting with bit commands, timers, and counters.


Teardown: What’s Inside a DC Servo Motor?

Teardown: What’s Inside a DC Servo Motor?

We know that servo motors are found inside machines that rely on precise motion with feedback to verify proper operation, but how do they work, and what makes them different from any other kind of motor?


Teardown: What’s Inside a 3-Phase Induction Motor?

Teardown: What’s Inside a 3-Phase Induction Motor?

Coil, field winding, rotor, stator, eddy current… When it comes to motors, there are numerous terms that describe the theory of operation, but what is inside a 3-phase motor? Take a look, and learn how they work.


Servo Motor vs Stepper Motor: Understanding the Differences

Servo Motor vs Stepper Motor: Understanding the Differences

When accurate positioning and speed control is needed, most engineers turn to servo motors or stepper motors, but what is the difference between the two, and which is the right choice?


Teardown: What’s Inside a Human-machine Interface (HMI)?

Teardown: What’s Inside a Human-machine Interface (HMI)?

Human-machine interfaces, or HMIs, provide visual process data and allow access to process parameters and diagnostics information. What’s inside these touchscreen displays, and how do they actually work?


PLC Program Commands: Arrays Part 4, Statistics and Sizing

PLC Program Commands: Arrays Part 4, Statistics and Sizing

Learn how to make complex calculations for validating data easily with the STD instruction, and learn how to display array sizes programmatically with the SIZE instruction.