As information technology (IT) and OT converge and production systems are required to be faster, scalable and more agile, classical control starts to feel insufficient. Engineers no longer just need to know how well a single controller performs, but how to coordinate the whole system.
Between device-level control and cross-system coordination, a new layer is emerging: an OT “hypervisor” that can unify heterogeneity and turn control into coordination.
Where classical control meets its limits
The need for this layer is rooted in the current structure of OT, and some fundamental flaws in the status quo. Different programmable logic controller (PLC) platforms run distinct control logics, while Supervisory Control and Data Acquisition (SCADA), Human Machine Interface (HMI) and historian systems are typically deployed as isolated layers. Each layer is optimized for an individual task, rather than coordinated operation. As a result, engineering efforts are duplicated, data models are inconsistent and system-wide visibility remains limited. Complexity is compounded by diverse standards and protocols.
IEC 61131, the international standard for PLCs, defines programming languages such as ladder logic and structured text. But vendor-specific extensions restrict portability and bind workflows to specific platforms. Protocols such as Modbus and DNP3 transport data between devices, with DNP3 adding time stamping and event handling, while IEC 61850 standardizes data models and services for substation automation.
Together, they sustain interoperability at a local level, but reinforce the need for an abstract coordination layer above them.
Defining the OT hypervisor
The term hypervisor originates in IT, where platforms such as VMware ESXi, Microsoft Hyper-V and Proxmox VE are used to virtualize hardware and manage virtual machines. In OT, this occurs at a different layer. An OT hypervisor does not virtualize compute resources alone, it abstracts and orchestrates operational logic, data models and control workflows across distributed systems. Acting as a supervisory coordination layer, an OT hypervisor coordinates control systems, data flows and engineering models.
This hypervisor also connects heterogeneous devices and protocols, orchestrates data and control functions and provides unified engineering, monitoring and governance across the OT landscape.
It further enables centralized lifecycle management, version control and structured change management across distributed assets. Rather than replacing PLCs or field devices, it integrates them into a scalable and manageable framework.
From concept to architecture: zenon as an OT hypervisor
Realizing this architecture requires a platform that is designed for integration, COPA-DATA’s zenon brings together an engineering studio, runtime engine and soft PLC functionality, all within one unified environment. With zenon Logic, IEC 61131-3 applications can be configured and run as a hardware-independent soft PLC, including in containerized deployments. This decouples control logic from dedicated devices, while preserving established standards.
SCADA, HMI, alarming, logging and PLC programming share a common data model. Variables and process objects are available across control and visualization without export or import steps, reducing integration overhead and supporting a consistent runtime context.
Support for a wide range of drivers and protocols unifies heterogeneous field devices and infrastructure assets through standardized interfaces, including IEC 61850, IEC 60870 and DNP3 in energy applications. Rather than eliminating this diversity, the platform structures it into a unified operational view.
By linking real-time OT data with higher-level IT processes, Industrial Internet of Things (IIoT) services and web-based dashboards, zenon extends automation into coordinated, data-driven decision support. In this role, it goes beyond simply controlling OT assets and functions as an abstraction and orchestration layer across systems.
zenon does not replace traditional virtualization. Instead, it operates above the virtual machine (VM) and hardware layer, focusing on OT workloads, data flows and engineering consistency.
zenon in practice
An Austrian prawn farm, White Panther Production GmbH, uses zenon to coordinate energy generation and aquaculture within a self-sufficient production model. Five hydropower plants generate around 30 GWh annually, and a biomass power plant is supervised through a common zenon environment. This enables centralized monitoring, remote access and resilient operation.
Within the facility, water temperature is maintained at 28 degrees celsius with continuous control of salinity, oxygen, ammonium, nitrate, redox and pH values, alongside regulated flow and automated feeding. zenon consolidates this measurement data, control logic and visualization in a unified runtime.
In addition, parameterization allows process adjustments without the need for repeated PLC reprogramming, while Extended Trend (an application for the representation of online and historical values of process variables) supports the analysis of live and historical data. The result is coordinated management of energy and production subsystems, all within one architectural framework.
zenon maintains consistent data models, alarms and control strategies across multiple communication protocols. This is useful in substation automation and distributed infrastructure. Elsewhere, web-based visualization provides centralized dashboards while engineering standards and governance remain centrally defined, which is useful for monitoring and controlling geographically distributed assets.
From control to orchestration
Industrial automation started with the goal of controlling individual machines but, today, the challenge lies in aligning entire systems. As systems and operations expand in scale, protocol diversity and also organizational reach, the move from isolated control to structured coordination has become essential especially in environments that require resilience, cybersecurity compliance and real-time transparency across distributed assets.
An OT hypervisor is an ideal answer to these challenges. It brings in a consistent layer that links heterogeneous devices, data and workflows into a coherent operational framework and introduces semantic consistency, centralized governance and scalable lifecycle management across sites and system boundaries. Through its unified runtime, integrated environment and expanded connectivity, zenon demonstrates how many of these coordination capabilities can already be realized in practice, extending classical control into system-wide orchestration without compromising determinism, operational stability or existing automation investments.
