What if your PLC could be powerful, flexible, and still easy to program...right out of the box?
That’s exactly what PLCnext by Phoenix Contact delivers.
The PLCnext is a modern, Linux-based controller that integrates seamlessly with Phoenix Contact HMIs, I/O, and other power products. Users gain access to the PLCnext Store, an online marketplace filled with free apps and libraries designed to simplify and streamline PLC and HMI programming.
Below are five of the best free PLCnext apps that help improve development, usability, and expand system functionality.
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PLCnext On-screen keyboard | AXL_Analog | PID with Autotune | File browser for PLCnext (ARM & X86) | Communication Libraries & Open Programming | Choose PLCnext | Additional Rources
With HTML5-based HMIs, user input can vary depending on the screen or browser being used. The PLCnext On-Screen Keyboard app eliminates the visual inconsistency by providing a standardized, screen-based keyboard and keypad for the user.
Key benefits include:
This free app is ideal for applications that require reliable, repeatable operator input.
The AXL_Analog library becomes an essential tool when the PLCnext is paired with Axioline I/O modules and Smart Elements. It includes predefined function blocks that reduce engineering time and improve signal reliability.
Additional Phoenix Contact libraries are also available, such as the Trio3 power supply library, which provides access to process data over IO-Link and includes ready-to-use eHMI visualization templates.
Many automation applications rely on PID controls for heating, speed, pressure, or flow regulation. The PID with AutoTune library simplifies setup while maintaining precise control. This free app helps reduce commissioning time and improves control stability across a range of applications.
Once data is logged inside the PLC, it must be accessed and archived efficiently. The File Browser for PLCnext installs directly on the controller and provides a web-based interface to the file system. This app is available for both ARM-based and x86-based PLCnext controllers.
PLCnext supports a wide range of industrial communication protocols and open programming languages. Free communication libraries are available that include function blocks for:
In addition, PLCnext’s Linux operating system allows application extensions for Node-RED and Python, enabling data handling, edge connectivity, and custom logic beyond traditional PLC programming.
Communication Libraries:
https://www.plcnextstore.com/us/search?category_ids=4&free_apps=true
Node-RED Apps:
https://www.plcnextstore.com/us/search?free_apps=true&name=node
With its expanding library collection of free apps, free engineering software, and open technological architecture, the PLCnext offers unmatched flexibility for automation systems.
If you’re looking for a lower-cost way to start testing PLCnext in your application, check out our PLCnext Starter Kit. It’s a simple way to get a controller in your hands and start experimenting.
Already know what you need and want to check pricing and availability for the most common standalone controller? Take a look at the PLCnext AXC F 1152.
Phoenix Contact's PLCnext Landing Page
Blog Post: Top Benefits of Predictive Maintenance: Boost Efficiency & Cut Costs.
PLCnext PID with Autotune Landing Page
Free Communication Libraries for PLCnext
Free Node-Red apps for PLCnext