Latest PLCs & PACs Technical Articles

Learn about the differences between red, green, infrared, and more recently, blue photoelectric sensors and how the…

Learn about the differences between red, green, infrared, and more recently, blue photoelectric sensors and how the different light spectrums can aid in varying industrial automation processes.

Learn about the common applications, programming procedures, and safety protocols of collaborative robot work cells,…

Learn about the common applications, programming procedures, and safety protocols of collaborative robot work cells, which are often simpler and less expensive than industrial robot work cells.  

Inside a controller, code is interpreted into the binary signals that influence input and output signals, flags and…

Inside a controller, code is interpreted into the binary signals that influence input and output signals, flags and registers, and even the communication of network signals. This is the job of firmware.

Centralized control systems are often seen as outdated compared to decentralized systems; however, both have their…

Centralized control systems are often seen as outdated compared to decentralized systems; however, both have their advantages and disadvantages when it comes to choosing which one to use in manufacturing. 

​​​​​​​We will show you how to recognize, utilize, and efficiently operate your comparison instructions in…

​​​​​​​We will show you how to recognize, utilize, and efficiently operate your comparison instructions in Rockwell Automation’s Studio 5000 and Automation Direct’s Productivity Suite to make your program flow smoothly.

One common challenge when working with legacy control systems is establishing communication with old devices that use old…

One common challenge when working with legacy control systems is establishing communication with old devices that use old protocols like RS232 and RS485. Learn about the importance of converting from serial to Ethernet.

There are many distributed fieldbus capabilities for valve manifolds that can save on network overhead and wiring. In…

There are many distributed fieldbus capabilities for valve manifolds that can save on network overhead and wiring. In this article, we will look at PLC programming of fieldbus manifolds highlighting Festo's CPX layout.

We will show you how to use the basic trigonometry functions to build ladder logic in a PLC, allowing for a clean,…

We will show you how to use the basic trigonometry functions to build ladder logic in a PLC, allowing for a clean, well-organized, and easy-to-use code that allows you and other users to troubleshoot your programs.

Communication protocols are a key component for an industry 4.0 compliant facility and are used to enable communication…

Communication protocols are a key component for an industry 4.0 compliant facility and are used to enable communication back and forth between cloud servers to transmit data or receive instructions.

We will show you how to use common math functions from two popular PLC programs—Rockwell Automation's Studio 5000 and…

We will show you how to use common math functions from two popular PLC programs—Rockwell Automation's Studio 5000 and Automation Direct Productivity Suite. 

Software obsolescence poses a threat in industrial automation equal to hardware obsolescence and should not be…

Software obsolescence poses a threat in industrial automation equal to hardware obsolescence and should not be overlooked. Many PLC OEMs offer tools to migrate upgraded software projects to the newest controller revisions.

The HART protocol enables instruments to send analog and digital signals over the same physical wire. This provides…

The HART protocol enables instruments to send analog and digital signals over the same physical wire. This provides multiple advantages for remote configuration, increased accuracy, and more.

Configuring analog signals into usable digital quantities is accomplished by scaling function inside the PLC, which,…

Configuring analog signals into usable digital quantities is accomplished by scaling function inside the PLC, which, along with analog signal wiring, is important to understand.

Counting up and down are commonly required functions in PLC lagger logic programs for tracking inventories, placement…

Counting up and down are commonly required functions in PLC lagger logic programs for tracking inventories, placement patterns, and gaining informational insights about machine performance statistics.

Designing an obsolescence mitigation plan to detect and solve mitigation risks before they occur is key to avoiding…

Designing an obsolescence mitigation plan to detect and solve mitigation risks before they occur is key to avoiding costly downtime and a potential catastrophe in control environments. 

Many PLC commands are well-known to programmers, including contacts, coils, timers, and counters. But a less-common…

Many PLC commands are well-known to programmers, including contacts, coils, timers, and counters. But a less-common instruction is the one-shot, capable of harnessing the incredible processing speeds in a CPU.

One of the most considerable risks in aging control environments is that eventually, spare parts become obsolete and…

One of the most considerable risks in aging control environments is that eventually, spare parts become obsolete and unavailable, and the lack of an upgrade plan can turn a simple failure into a catastrophe.

Credited with coining the name ‘PLC’, Allen-Bradley and parent company Rockwell Automation are major players in the…

Credited with coining the name ‘PLC’, Allen-Bradley and parent company Rockwell Automation are major players in the world of control systems. Learn how the hardware platforms have evolved into the familiar modern configurations.

The timer is a fundamental function of ladder logic programming. In this article, we discuss on- and off-delay as well as…

The timer is a fundamental function of ladder logic programming. In this article, we discuss on- and off-delay as well as retentive timers and define the inputs and outputs required to properly use them.