What Is Virtual Commissioning? Testing Factory Automation Before Installation.

What Is Virtual Commissioning?

Virtual commissioning is the process of testing and evaluating industrial automation systems using digital models before or alongside installation of the physical equipment.

It allows engineers to examine how machine controls, robotic systems, and other equipment should operate together without requiring every test to be performed on the completed production line.

For example, a manufacturer planning a robotic assembly cell may connect its PLC software to a simulated workstation to identify programming and coordination problems before installing the machinery.

Virtual commissioning is used to reduce selected project risks, integration problems, and startup delays.

Key Takeaways

• Virtual commissioning tests automation behavior using digital representations of equipment and processes.
• It can identify control logic and integration problems before physical equipment is fully operational.
• Results depend on model accuracy and do not eliminate the need for physical commissioning and acceptance testing.

How Does Virtual Commissioning Work?

Imagine a factory planning to install a robot that loads components into a CNC machine.

The system will include a robot, gripper, machine door, fixtures, and industrial controller.

Engineers create a digital representation of the equipment and its operating sequence.

The control software is connected to the simulated equipment.

For example, the PLC may command the machine door to open.

The simulation responds by representing the door's movement and reporting the relevant status.

The controller then requests that the robot begin its loading operation.

Engineers can observe whether the sequence works as intended.

If the robot receives a loading command before the door has opened, the problem can be identified in the virtual environment.

The software can then be corrected before the complete physical system is available.

Virtual Commissioning vs. Traditional Commissioning

Traditional commissioning involves preparing, configuring, testing, and bringing physical equipment into operation.

Virtual commissioning performs selected testing and validation activities using simulated equipment.

For example, engineers may test a production sequence virtually before the robot arrives.

Once the real equipment is installed, they still need to verify wiring, actual movement, safety functions, sensors, and operating performance.

The methods complement each other.

Software-in-the-Loop vs. Hardware-in-the-Loop

Virtual commissioning can use different testing arrangements.

Software-in-the-loop: Runs control software against simulated system components.

Hardware-in-the-loop: Connects actual control hardware to a simulated physical system.

For example, a virtual PLC can execute a program inside a software simulation.

Alternatively, a physical PLC may communicate with a simulated production line.

Both approaches can provide useful evidence, although they test different aspects of the system.

Does Virtual Commissioning Require a Digital Twin?

The terms are closely related but not identical.

Virtual commissioning uses a suitable digital model to evaluate automation behavior.

That model is sometimes called a digital twin, particularly when it represents a specific intended machine or installation.

However, a continuously connected operational digital twin is not necessarily required.

A virtual model built specifically for testing control sequences may be sufficient.

The important requirement is that the model represents the behavior relevant to the tests.

What Can Virtual Commissioning Test?

PLC logic: Verify operating sequences and control conditions.

Robot coordination: Examine interactions between robots and surrounding machinery.

Material flow: Evaluate selected product-transfer and handling sequences.

Machine interfaces: Test communication and expected status responses.

Fault handling: Introduce simulated jams, device failures, or unexpected operating conditions.

Operating sequences: Confirm that equipment follows the intended process.

The completeness of each test depends on what the virtual model includes.

What Are the Limitations?

A simulation may not reproduce actual friction, mechanical deformation, sensor noise, or wiring problems.

For example, a virtual gripper may appear to hold a component reliably even though the physical gripper lacks sufficient force.

Engineers must distinguish between software behavior that has been tested and physical behavior that remains unverified.

Frequently Asked Questions

Can virtual commissioning reduce installation time?

It can reduce certain debugging and integration tasks during startup, although the actual benefit depends on project complexity and simulation quality.

Can virtual commissioning replace a Site Acceptance Test?

No. Site acceptance testing verifies the installed system against agreed requirements under relevant physical conditions.

The Bottom Line

Virtual commissioning allows automation teams to test important machine and control behavior before completing a physical installation. It can reduce avoidable integration problems, but the real production system still requires appropriate commissioning and validation.