Latest Security & Access Technical Articles

Networked remote I/O allows machine centers to operate while physically separated from the rest of the system, and often,…

Networked remote I/O allows machine centers to operate while physically separated from the rest of the system, and often, the solution can drop right into place.

Learn about some of the basic Boolean logic gates using the graphical PLC language of function blocks, recreating ladder…

Learn about some of the basic Boolean logic gates using the graphical PLC language of function blocks, recreating ladder logic and other IEC languages with a digital flair.

Previously reserved for personal and commercial deployments, learn how cellular IoT connectivity technologies are…

Previously reserved for personal and commercial deployments, learn how cellular IoT connectivity technologies are influencing industrial trends, organizations, and integrators.

A common field-level protocol for automation is ASi or AS-interface–a method used to convey actuator and sensor data…

A common field-level protocol for automation is ASi or AS-interface–a method used to convey actuator and sensor data and commands between I/O devices and the PLC control system level.

It can be risky to adopt unknown technology; it poses serious security concerns if misused. The Control.com engineering…

It can be risky to adopt unknown technology; it poses serious security concerns if misused. The Control.com engineering team contacted our friends at OnLogic to gain some insight into VPN technology.

A shunt resistor connects in series with a load to measure the high current in the DC circuit. Using Ohm's law, the…

A shunt resistor connects in series with a load to measure the high current in the DC circuit. Using Ohm's law, the current value can be calculated by measuring the voltage across the shunt.

The SLC 500 PLC family dominated automation control for well over thirty years and now, with the recent discontinuation…

The SLC 500 PLC family dominated automation control for well over thirty years and now, with the recent discontinuation of most of the series, we look at the differences between SLC and modern Logix PLCs.

Learn all about the power supply: modular and built-in devices that deliver electricity to the PLC backplane and modules,…

Learn all about the power supply: modular and built-in devices that deliver electricity to the PLC backplane and modules, and learn the difference between control and field device power delivery.

Protection against faults is crucial for any electrical system. This article examines various protective devices,…

Protection against faults is crucial for any electrical system. This article examines various protective devices, highlighting their roles and best use cases to ensure system integrity and longevity.

Logic is critical for industrial control, and it usually looks like ladders, function blocks, or structured text. I/O…

Logic is critical for industrial control, and it usually looks like ladders, function blocks, or structured text. I/O controllers are designed to automate simple logic tasks and data functions.

An age-old debate in PLC programming: investigating the uses and caveats of latching software commands versus seal-in…

An age-old debate in PLC programming: investigating the uses and caveats of latching software commands versus seal-in ladder logic for industrial control applications.

Nidec’s Control Techniques has launched the SI-BACnet IP add-on module for new and existing HVAC drives to help…

Nidec’s Control Techniques has launched the SI-BACnet IP add-on module for new and existing HVAC drives to help communicate between devices and create a connected automated building.

Learn how to connect analog inputs, either voltage or current, to the Phoenix Contact’s IIoT PLC platform and design…

Learn how to connect analog inputs, either voltage or current, to the Phoenix Contact’s IIoT PLC platform and design simple data processing programs with the PLCnext Engineer IDE.

Both lists and dictionaries can retain structured data in Python. The dictionary is unique in that it stores individual…

Both lists and dictionaries can retain structured data in Python. The dictionary is unique in that it stores individual entries with human-readable logical names rather than index numbers.

Ethernet switches can use four different types of connections: RJ45, fiber, M12, and SFP. Understanding the difference…

Ethernet switches can use four different types of connections: RJ45, fiber, M12, and SFP. Understanding the difference can help with network troubleshooting, design, or alteration.

Knowing what kind of control system to use: that’s a question that must be answered before setting up the factory…

Knowing what kind of control system to use: that’s a question that must be answered before setting up the factory floor. Why would someone choose pneumatic over electrical controls?

We conclude the data flow project with the step of developing a business intelligence dashboard to present machine data,…

We conclude the data flow project with the step of developing a business intelligence dashboard to present machine data, at a reliable schedule, to a leadership or maintenance team.

Digital controls like VFDs and soft starts have advantages by elongating start time, but simple strategies for starting…

Digital controls like VFDs and soft starts have advantages by elongating start time, but simple strategies for starting motors with a reduced current draw, like star-delta (or wye-delta) are common.

It’s important to consider your PLC tag naming convention when using different styles. Learn when and why you might…

It’s important to consider your PLC tag naming convention when using different styles. Learn when and why you might even use more than one, depending on the circumstances and scope of your project.