Latest PLCs & PACs Technical Articles

Some devices, like switches, are non-polar; you can connect them in either direction. What makes diodes so special, and…

Some devices, like switches, are non-polar; you can connect them in either direction. What makes diodes so special, and how can you tell the right way from the wrong way?

Besides using a Raspberry Pi or an Arduino Uno, a low-cost PLC can be built using the popular ESP32 microcontroller. The…

Besides using a Raspberry Pi or an Arduino Uno, a low-cost PLC can be built using the popular ESP32 microcontroller. The OpenPLC software supports this popular 32-bit platform.

Ladder logic is an industrial control systems legend stemming from electrical line diagrams before the days of PLCs.…

Ladder logic is an industrial control systems legend stemming from electrical line diagrams before the days of PLCs. Although logical, they are difficult to interpret.

In any process industry, transducers are the basic instrumentation unit for continuous monitoring of system variables…

In any process industry, transducers are the basic instrumentation unit for continuous monitoring of system variables that provide inputs for control system algorithms and outputs.

Ladder logic is an industrial control systems legend stemming from electrical line diagrams before the days of PLCs.…

Ladder logic is an industrial control systems legend stemming from electrical line diagrams before the days of PLCs. Although logical, they are difficult to interpret.

Learn all about the central processing unit (CPU): the built-in module inside the PLC responsible for executing the…

Learn all about the central processing unit (CPU): the built-in module inside the PLC responsible for executing the program and communicating with external devices.

With a C++ extension, monitoring of status and warning messages can easily be displayed with OpenPLC. Arduino PLC…

With a C++ extension, monitoring of status and warning messages can easily be displayed with OpenPLC. Arduino PLC variables can then be observed using a serial terminal or monitor.

Learn how to use an AutomationDirect BRX PLC with the Do-more Designer software. This tutorial will cover discrete I/O…

Learn how to use an AutomationDirect BRX PLC with the Do-more Designer software. This tutorial will cover discrete I/O commands along with basic timing and counting ladder functions.

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.

As commercial and industrial software migrates to ‘cloud-based’ and ‘subscription’ models, what does it mean? How…

As commercial and industrial software migrates to ‘cloud-based’ and ‘subscription’ models, what does it mean? How does it affect the usability and security of critical parts of control infrastructure?

The next part of our Python learning journey will touch upon control flow, critical to implementing logic in programs.…

The next part of our Python learning journey will touch upon control flow, critical to implementing logic in programs. The concept is broad and the first topic to cover will be if/elif statements.

It's important to keep your system up and running without regular intervention. While every system requires maintenance,…

It's important to keep your system up and running without regular intervention. While every system requires maintenance, never overlook the critical importance of tools and training for the operators.

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.

Wrapping up the data structures portion of our journey are sets. This is the least frequently used data structure, but…

Wrapping up the data structures portion of our journey are sets. This is the least frequently used data structure, but don’t write off the set just yet. Its efficiency and simplicity may provide value in manufacturing data processing.

Every method of connecting to an industrial device—USB, serial, or Ethernet—poses challenges. For Ethernet, we often…

Every method of connecting to an industrial device—USB, serial, or Ethernet—poses challenges. For Ethernet, we often must adjust the IP address of our PC, not only the device itself.

As we approach the conclusion of Python data structures, we’ll examine the tuple. Used less frequently than lists and…

As we approach the conclusion of Python data structures, we’ll examine the tuple. Used less frequently than lists and dictionaries, tuples do serve some handy use cases where immutability is a critical requirement.

When setting up a system for the first time, the process can seem complex and daunting. However, there are tools…

When setting up a system for the first time, the process can seem complex and daunting. However, there are tools available to make the job much easier before commissioning.

Learn how to get started with Phoenix Contact’s PLCnext and Engineer software, a platform that ultimately provides a…

Learn how to get started with Phoenix Contact’s PLCnext and Engineer software, a platform that ultimately provides a PLC environment for plant control as well as an OS for more advanced IIoT projects.