What SCADA is
SCADA (Supervisory Control and Data Acquisition) monitors and operates remote equipment — sensors, pumps, valves, facility systems — through field controllers, telemetry, a server or historian, and an operator HMI. Safety interlocks and hard control stay in OT (PLC/DCS), not in a browser.
Layer map
| SCADA | Role | LDUX mapping |
|---|---|---|
| Field devices / RTUs / PLCs | Sense and actuate | Outside LDUX. Real plant / OT hardware. |
| Telemetry | Tags, alarms, setpoints (OPC-UA, MQTT, Modbus, …) | Adjacent data. Custom integrations and reporting sit beside the feed. |
| Server / historian | Collect, store, trend | App store only: OPFS ldux.db, edge KV/D1 — not a process historian. |
| HMI | Operator screens | Native web components — the human surface. |
| Engineering / config | Who may change screens and recipes | LDUX editor + sign-off — only attested publishes go live. |
| Audit / provenance | Who changed what, when | Signed objects — hash of layout, tokens, and HTML plus agent and org. |
| Secure compute boundary | Logic that must not be casually tampered with | TEE / WASM — sign and verify outside ordinary page script. |
What maps cleanly
- Operator-facing views → web components bound to data (HMI-like panels for information work).
- “Only approved screens go live” → signed object on publish, verify on load.
- Trust boundary → local browser WASM/TEE or edge WASM for crypto; the browser is HMI, not the controller.
- Application state → snapshots in OPFS or at the edge for layouts and forms — not tag historians.
What must stay outside LDUX
Setpoints that move physical plant, safety interlocks, real-time control loops, and air-gapped OT networks stay in SCADA, DCS, and PLC. LDUX can describe, display, and attest information workflows next to those systems — it does not supervise pumps or breakers.
North star
SCADA’s HMI + config + audit ideas map to native web components + signed publish + TEE/WASM verify. SCADA’s control and safety do not.
For Data Field Services, that means SCADA-adjacent consulting: reporting, field-to-office integration, and attested operator views for oil & gas and data centers — without claiming to be a control system.