Automation without walls: Why industrial control systems are changing from rigid to flexible
- Christina Volkringer
- 21 Jul 2026
- 2 min
What you need to know
Traditional industrial control systems, including distributed control systems (DCS), were designed for stability but are increasingly limiting modernization. Their dependence on proprietary hardware and software creates operational rigidity, vendor lock-in, and integration challenges. Open, software-defined automation (SDA) addresses these issues by decoupling software from hardware and using open standards to enable interoperability, scalability, and continuous evolution. As process industries face growing cybersecurity, workforce, energy, and operational challenges, open SDA is emerging as a foundation for adaptive, cybersecure, AI-ready industrial operations.
For decades, process industries built industrial control systems, specifically distributed control systems (DCS), for one overriding objective: stability. If a refinery, water treatment plant, mining operation, or chemical facility could run continuously with minimal interruption, the control system or DCS had done its job.
But the conditions surrounding industrial operations have changed. Energy volatility, cybersecurity threats, supply chain instability, workforce shortages, and the demands of digital transformation are exposing the limits of rigid, hardware-centric automation architectures.
The challenge is no longer only about keeping plants running. It is about keeping them adaptable.
This shift is putting open, software-defined automation (SDA) at the center of transformation in both hybrid and process industries. While there are other software-defined DCS options on the market, they remain closed or proprietary. These systems rely on proprietary standards and on specific hardware such as servers and models. Proprietary standards and hardware make integration with other systems difficult and costly.
The stakes are especially high in process industries, where downtime affects both production and safety. This is not a routine technology upgrade. It is a fundamental rethink of how industrial control systems are built, operated, and evolved.
Legacy industrial control systems are becoming barriers to modernization because they are rigid, hardware-dependent, and difficult to integrate with new technologies
Open, software-defined automation decouples software from hardware, enabling interoperability, flexibility, and easier modernization without full system replacement
Open architectures based on standards such as IEC 61499 and OPC technologies support IT/OT convergence, digital continuity, and distributed intelligence
Process industries are prioritizing cybersecure-by-design systems, autonomous operations, and scalable, AI-ready architectures to manage workforce shortages, operational complexity, and evolving energy demands.
For years, industrial plants relied on industrial control systems built like sealed boxes. Hardware and software were tightly tied together. The approach worked well for stability. But over time, it created a different problem: rigidity.
Even small system changes could trigger costly upgrades, engineering rework, or vendor support calls. Plants became locked into proprietary environments that were difficult to scale, modify, or integrate with newer technologies.
The cost of that rigidity is growing harder to ignore. Vendor lock-in now costs businesses an estimated $11.3 million each year, or nearly 7.5% of annual revenue in some operations. Older systems also struggle to connect with modern digital tools, forcing companies to spend heavily on retrofits and integration projects.
Meanwhile, the industrial landscape is changing fast.
Chemical plants, biofuel facilities, mining operations, water systems, and consumer goods manufacturers are adopting more flexible production models. Many now combine continuous and discrete processes within the same plant requiring hybrid operations. These environments need industrial control systems that can adapt in real time, not systems designed for a fixed world that no longer exists.
This is where open, software-defined automation (SDA) changes the conversation.
Open SDA has the potential to transform even the most traditional industrial control systems, including distributed control systems (DCS).
By decoupling software from hardware and embracing open standards, it helps address some of the industry's most persistent challenges like vendor lock-in, high complexity, limited interoperability, and growing operational risk; while creating a more flexible path to modernization.
Instead of tying control applications to dedicated hardware, open SDA enables applications to run across distributed computing environments. Control logic can move between controllers, servers, and edge devices without operational disruption. Architecture becomes modular rather than monolithic. Systems become scalable and flexible rather than limited and rigid.
The implications extend beyond engineering efficiency.
In process industries, operational continuity remains non-negotiable. SDA architectures designed around distributed intelligence and high-availability principles reduce the risk of disruption.
One example is High Availability Disruption Avoidance (HADA), which allows failed nodes within an automation environment to recover without human intervention while maintaining operational continuity.
The broader objective is responsible AI integrated at all levels, throughout the automation lifecycle (design, build, operate, optimize), enabling autonomous AI-ready operations.
That ambition is visible across several architectural trends:
- Auto-onboarding of devices and assets
- Predictive maintenance capabilities
- Orchestrated system management
- Dynamic workload balancing
- AI-enabled analytics and simulation
- Containerized control applications
- Centralized lifecycle management
These capabilities address a growing industrial reality: process operations are becoming too complex to manage efficiently through manual intervention alone.
Cybersecurity is also pushing this transition forward faster than expected. Many legacy industrial control systems were built long before cyber threats became a major industrial concern.
Today, as IT and OT systems become more connected, the number of potential entry points for attacks continues to grow. At the same time, hybrid and process industries are dealing with tighter regulations and rising operational risks, making secure, modern industrial control systems far harder to postpone.
As a result, modern control architectures are embedding security directly into the system design rather than treating it as an add-on layer. Modern industrial control systems are being designed with security built into every layer. That includes encryption, role-based access controls (RBAC), hardened devices, secure default settings, and continuous monitoring. Many are also being aligned with IEC 62443-3-3 SL2+ cybersecurity standards to strengthen protection across industrial operations.
That transition may prove essential as industries pursue broader goals around resilience, sustainability, and operational agility. Energy transition pressures are already forcing continuous process industries like oil and gas, chemicals, and mining, to integrate renewable assets, manage fluctuating energy conditions, and optimize increasingly interconnected operations.
Open, SDA offers a different model: one where industrial control systems can evolve continuously instead of being replaced in cycles.
The deeper significance of open, SDA may not lie in any single feature or architecture. It lies in what it changes philosophically. For decades, industrial automation prioritized permanence. Today, the future of industrial control depends instead on systems designed for continuous change.
The plants that succeed in the next industrial era may not be the ones with the most hardware. They will be the ones with industrial control architectures flexible enough to absorb uncertainty without breaking under it.
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