As industrial automation continues to evolve, open control systems are emerging as a game-changing force. In a recent podcast interview with Ken Crawford, Senior Director of Automation at Weidmuller, the growing reliability, flexibility, and security of open systems were discussed as key drivers in their increasing adoption across manufacturing sectors.
Despite lingering caution among some manufacturers, support from reputable industry leaders like Weidmuller is accelerating trust in these systems. Companies are realizing the long-term value of open control platforms over traditional proprietary automation systems.
What Is an Open Control System?
According to Crawford, an open control system is "a platform that allows you to install publicly available applications to build a custom control solution to meet your requirements." This flexibility eliminates the need for large, specialized design teams to develop software from scratch.
"By using proven and widely adopted applications, you reduce complexity and accelerate the design-to-deployment process," Crawford explained. "Open systems also remove single-vendor dependencies, allowing manufacturers to select hardware and software components that best fit their needs."
This vendor-neutral architecture is a significant departure from proprietary systems, which are based on closed-source software and require ongoing investment in manufacturer-specific technology.
Key Technologies Behind Open Systems
Open platforms commonly support industrial communication standards such as OPC UA, MQTT, and Modbus, enabling easier system integration and interoperability. These open protocols are not only widely used but also supported by active developer communities that contribute to ongoing improvements, troubleshooting, and innovation.
"Unlike closed architectures," Crawford said, "open systems encourage collaboration and third-party software integration, which speeds up deployment and reduces overall costs."
u-OS: Weidmuller's Open Control Platform
At the Automate 2025 conference, Jack Fillenwarth, Senior Software Specialist at Weidmuller USA, showcased the company's u-OS platform - a fully open, app-based control ecosystem running on its u-Control M4000 controller.
The demo featured multiple applications running simultaneously on a single controller, including the PLC runtime with Codesys, remote I/O, u-link remote access, and ProCon-Web for system visualization and production monitoring.
"We're not just running a PLC here," said Fillenwarth. "We've containerized multiple applications on one device. This enables remote access, diagnostics, and control of a machine - or an entire production flow - from just a web browser."
The Role of Containerized Applications
One of the standout features of Weidmuller's approach is the use of containerized applications. This modern software deployment method allows different control and monitoring tools to operate independently but simultaneously on the same controller. By isolating each application, users benefit from greater security, stability, and flexibility.
With containerization, system updates or changes to one application do not interfere with others. This modularity not only enhances uptime but also simplifies system maintenance and scaling.
Advantages Over Proprietary Systems
The move to open systems offers clear benefits:
Faster Deployment: Publicly available apps and standardized protocols cut development time significantly.
Lower Total Cost of Ownership: Reduced need for specialized development and costly proprietary upgrades.
Future-Proof Flexibility: Easy to integrate new technologies without vendor lock-in.
Increased Resilience: Community-supported platforms ensure rapid issue resolution and continuous improvement.
Web-Based Access: Remote control and diagnostics via a browser eliminate the need for complex software installations.
Conversely, proprietary systems often lock users into long-term vendor relationships, require expensive licensing models, and restrict customization through closed architectures. As Crawford noted, "The closed commercial model often limits innovation and forces users into a reactive mode rather than enabling them to build proactive, forward-thinking systems."
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Shifting Perspectives in Industry
While some manufacturers are still cautious about adopting open platforms due to perceived cybersecurity and integration risks, the ongoing success of platforms like u-OS is changing minds. As companies begin to see the operational and strategic value of open systems, adoption rates are expected to increase significantly.
"The flexibility and scalability of open control systems make them ideal for digital transformation initiatives," Fillenwarth added. "With tools like containerized apps and universal access through the cloud, open systems can power the future of smart manufacturing."
Conclusion
The industrial automation landscape is undergoing a profound shift. Open control systems like Weidmuller's u-OS platform are proving to be agile, cost-effective, and secure solutions for a wide range of applications - from factory automation to process control.
As the industry moves toward greater openness, transparency, and interoperability, companies that embrace open control architectures will be better equipped to innovate, scale, and thrive in an increasingly connected world.
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