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Troubleshooting for PLC Modules and I/O Devices

Troubleshooting for PLC Modules and I/O Devices

Failures of I/O systems are a common source of headache for control engineers. Troubleshooting those devices that have polarized connections (source vs sink, and NPN vs PNP) is a technique worth refining.


SPC Pillar: Design of Experiments (DoE)

SPC Pillar: Design of Experiments (DoE)

The fourth pillar of effective statistical process control (SPC) is the use of designed experiments used to learn as much as possible from a limited number of experiments, yet remain statistically relevant enough to be useful.


Understanding the Basics of Pulse Width Modulation (PWM)

Understanding the Basics of Pulse Width Modulation (PWM)

Power delivered to devices can be changed by raising or lowering the voltage and current. But this method does not always produce intended results. Pulse width modulation (or PWM) can be used to better control variable loads.


Info Byte: Difference Between Analog and Digital Multimeters

Info Byte: Difference Between Analog and Digital Multimeters

Analog and digital multimeters have both enjoyed popularity in different generations of electrical systems. What is unique about the analog meters, and in what situations might they be preferred over their digital counterparts?


SPC Pillar: Continual Improvement Process (CIP)

SPC Pillar: Continual Improvement Process (CIP)

Statistical process control (SPC) allows for continual improvement process (CIP), a method of optimizing a process driven by data and statistical methods.


SPC Pillar: Using Control Charts

SPC Pillar: Using Control Charts

Learn how control charts are used in statistical process control (SPC) to show how a process changes with time as compared to past measurements, providing reliable visualizations for data-driven decisions.


What Is a PLC? An Introduction to Programmable Logic Controllers

What Is a PLC? An Introduction to Programmable Logic Controllers

What is a PLC? This article will lay out a succinct definition of a programmable logic controller and explain its basic components.


Info Byte: Definition of Pressure and Flow in Fluid Systems

Info Byte: Definition of Pressure and Flow in Fluid Systems

Pressure and flow rate are terms used in all areas of hydraulic and pneumatic systems. Learn the definition and science of these terms, and the reason they are so important within industry.


SPC Pillar: Data Collection

SPC Pillar: Data Collection

Statistical process control (SPC) is meaningless without the proper collection and analysis of data. For some process parameters, this is a simple task. But not every part of a process is driven by simple, quantitative parameters.


Sinking vs. Sourcing for Control System Modules - Explained

Sinking vs. Sourcing for Control System Modules - Explained

Digital control systems are particular about the direction of current flow from sensors and input devices. The terms sourcing and sinking (often abbreviated source and sink) are among the more confusing ratings found on I/O module datasheets. Part 1 of a 3-part series.


Info Byte: What’s the Reason Behind Relay Terminal Numbering?

Info Byte: What’s the Reason Behind Relay Terminal Numbering?

Any industrial electrician can instantly recognize a relay, but when it comes to wiring, why are the terminals numbered in such apparently random order?


What is Statistical Process Control (SPC)?

What is Statistical Process Control (SPC)?

Learn how statistical process control (SPC) can provide a foundation for decisions used to reduce waste and increase efficiency in the manufacturing process.


Introduction to Allen-Bradley Data Highway (DH) Networks

Introduction to Allen-Bradley Data Highway (DH) Networks

In this article, learn the basics of Allen-Bradley Data Highway, the various network structures, and the relationship between DH and Ethernet networks.


Lock-out-tag-out (LOTO) Devices for Industrial Safety

Lock-out-tag-out (LOTO) Devices for Industrial Safety

One of the most visible elements of industrial safety is the use of lock-out-tag-out (LOTO) devices, familiar to those with experience. But, if you are new to the workforce, a brief introduction may be helpful.


Introduction to Industrial Network Gateways

Introduction to Industrial Network Gateways

This article teaches the basics of gateways in industrial networks and PLC-to-PLC communication.


Boolean Logic for Ladder Diagrams

Boolean Logic for Ladder Diagrams

Ladder diagrams, or ladder logic, is a popular programming language used for PLCs. Programmers can utilize boolean logic as a base for their ladder diagrams. Learn the basics and structures for boolean logic.


Developing a Fuzzy Logic Controller for a Servo Motor Using Mathworks Simulink

Developing a Fuzzy Logic Controller for a Servo Motor Using Mathworks Simulink

Servo motors are widely utilized in industry for numerous applications. How do you use fuzzy logic to control a servo motor?


Introduction to Smart Sensors

Introduction to Smart Sensors

Smart sensors differ from traditional sensors in that they offer benefits such as self-diagnostics, simplified wiring and communication, and more efficient remote monitoring.


Graphical User Interface (GUI) vs. Human-machine Interface (HMI)

Graphical User Interface (GUI) vs. Human-machine Interface (HMI)

Learn the similarities and differences between GUIs and HMIs in the industrial sector. Can they be used together?


Protecting Control Systems with Safety Instrumented Systems (SIS)

Protecting Control Systems with Safety Instrumented Systems (SIS)

Safety is of utmost importance in the day-to-day operations of any system, especially a system where humans and machines work together. Learn all about Safety Instrumented Systems and what it takes to keep workers safe, and the system running smoothly!