OPC UA in action: the SLX GridPilot industrial digital twin

Описание и применение

GridPilot демонстрирует полный цикл от команды OPC UA до визуального подтверждения в симулированном гидроэлектростанционном двоих единицах, позволяя пользователям проверять модели данных, качество измерений и обработку сбоев.

Задача

Industrial automation requires a clear link between OPC UA commands and observable plant behavior, but many systems lack a demonstrator that shows this end‑to‑end flow.

Результат

GridPilot demonstrates a complete OPC UA command‑to‑feedback loop in a simulated hydro plant, enabling users to validate information models, monitor quality, inject faults, and observe recovery—all within a single desktop application.

Рабочий процесс

• 1. Start OPC UA Studio and connect to three local servers (127.0.0.1:4840‑4842).
• 2. Browse the server namespace (urn:siliconlogix:gridpilot:v1) and inspect node types, quality, timestamps, and engineering units.
• 3. Use the guided tour to request power via SetPower(1.2) on U1, observe the queued response, and monitor LastCommand, power, state, and actuator positions.
• 4. Stop the unit with Stop() and confirm zero speed and closed flow‑control devices through subscriptions.
• 5. Inject a sensor fault or communication loss to trigger OffNormalAlarmType conditions, acknowledge the alarm, and restore normal operation.
• 6. Use watchlists and Snapshot variables to view coherent plant state, source timestamps, and simulated time.
• 7. Export browsed instances as NodeSet2 XML, JSON, or CSV for documentation.
• 8. Replay recorded sequences in the Workbench to compare behavior and generate CSV exports.

Доказательства

OPC UA becomes easier to understand when a command produces an observable response.

Источник

Requesting power does not mean that power has already been delivered. Calling SetPower(1.2) on U1's endpoint requests 1.2 MW of generation.

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The servers expose standard OPC UA OffNormalAlarmType conditions with severity, message, active state and acknowledgement.

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