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Explaining the Tech: Common vs. Isolated PLC I/O Modules

Explaining the Tech: Common vs. Isolated PLC I/O Modules

Learn the difference between common and individually isolated PLC I/O modules; how do we know when isolation might be helpful or required for outputs, inputs, and analog signals?


So, You Got a Modbus TCP Device… What Next?

So, You Got a Modbus TCP Device… What Next?

Despite being one of the oldest protocols in automation, Modbus is still more complex than digital I/O. When you have a Modbus TCP device, what do you do? How do you actually use it?


DC Bus Fundamentals in Industrial Motor Drives

DC Bus Fundamentals in Industrial Motor Drives

Learn about precharge circuits, inrush current, and understand why VFD and servo drives may trip during power-up.


Working With Data: Looping Through Arrays In A PLC

Working With Data: Looping Through Arrays In A PLC

Arrays can handle large amounts of data, but when you need to extract a portion of that data, you might need to execute a loop. Learn a few examples and tips for creating loops in PLC logic.


How to Measure Resistance with a Multimeter

How to Measure Resistance with a Multimeter

When the power is removed to a circuit, the common measurements of voltage and current prove meaningless. The only remaining option is to use resistance testing to determine which components and conductors are working.


First Test Run: Getting to Know the Bosch Rexroth ctrlX CORE

First Test Run: Getting to Know the Bosch Rexroth ctrlX CORE

Get a first look at Bosch Rexroth’s ctrlX CORE, an industrial PC that unifies PLC, motion, and HMI through an app-based automation platform.


Tutorial: Setting up an Inovance HMI With A Mitsubishi PLC

Tutorial: Setting up an Inovance HMI With A Mitsubishi PLC

This guide shows you how to create a simple Inovance HMI project and connect it to a Mitsubishi PLC using serial and Ethernet methods, including practical setup steps and common mistakes to avoid.


Synchronized Motion for Servos | Coordinated Axes

Synchronized Motion for Servos | Coordinated Axes

Coordinating motion in three or more axes is a difficult manual process. For more advanced gantry or articulated robots, this motion type solves the complex calculation of a set of related joints.


The Role of Sensors and Control Systems in Smarter Conveyor Design

The Role of Sensors and Control Systems in Smarter Conveyor Design

Conveyor technology is rapidly advancing thanks to the close integration of mechanical machines and electrical controls, but it’s important to understand how feedback improves that relationship.


Set Up For Success | Scheduling Tasks in PLC Programs

Set Up For Success | Scheduling Tasks in PLC Programs

When setting up a new program in a Rockwell PLC, task scheduling is an important and often overlooked issue where errors appear as inconsistencies, often incorrectly attributed to random faults.


Control.com Readers’ Choice Awards 2025

Control.com Readers’ Choice Awards 2025

Welcome to the end of 2025 and the beginning of 2026! We’re excited to see where the industrial automation world takes us in this new year.


Synchronized Motion for Servos | Cam Profiles

Synchronized Motion for Servos | Cam Profiles

Cam profiles are a great way of strictly controlling two servo axes to follow a predefined path. Follow along as we dive into setting up and programming an electronic cam profile.


Synchronized Motion for Servos | Gearing Profile

Synchronized Motion for Servos | Gearing Profile

Synchronized motion has become an industry standard with robots, gantries, and pick and place automation. Follow along this three-part series as we discuss methods of synchronizing servo motors.


Automation Questions: Why Do We Choose Certain Control Voltages?

Automation Questions: Why Do We Choose Certain Control Voltages?

You’ve seen it a thousand times: 24 volts powering a device or representing a trigger signal, but what makes 24 VDC such a versatile voltage, and what about the other voltages in control cabinets?


Tutorial: Design a Temperature Controller Using Node-RED

Tutorial: Design a Temperature Controller Using Node-RED

Not every control system requires an expensive PLC. This tutorial will introduce Node-RED, a popular programming environment that can be installed on a low-cost single-board controller.


Understanding PLC Tags: Controller Scope vs. Program Scope

Understanding PLC Tags: Controller Scope vs. Program Scope

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.


Node-RED and a Low-Code Approach to Automation

Node-RED and a Low-Code Approach to Automation

Looking for a way to create IIoT applications for your factory without hiring expensive developers or spending months on the computer? Take a look at Node-RED’s approach to low-code applications.


Tutorial: Driving a Mecademic Industrial Robot with a Rockwell PLC

Tutorial: Driving a Mecademic Industrial Robot with a Rockwell PLC

Learn how to drive a compact Meca500 industrial 6-axis robot with a CompactLogix PLC over an Ethernet connection, transferring direct TCP set points in joint and world coordinate systems.


A New Way to Robot: A Teach Pendant Feel With Structured Text Language

A New Way to Robot: A Teach Pendant Feel With Structured Text Language

Meet the Meca500 6-axis arm, a robot known for its ultra-high precision and compact footprint. Learn how to use the web server for programming and 6-axis jogging with a structured text interface.


All About The Legendary Stack Light

All About The Legendary Stack Light

The stack light has a simple but powerful purpose: to report the status of the equipment. Follow along as we take a deep dive into the venerable illuminated signal tower.