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Module 8 · SCADA Systems

SCADA Systems

SCADA architecture, RTUs, HMI client-server design, the historian, alarm management, trending, reporting, redundancy, and remote monitoring — how a plant's scattered control loops become one supervised, operable system.

Module 7's networks carry the data; this module is about what receives it and what an operator actually does with it. Building on that network foundation, this module works through the client-server SCADA architecture itself, the RTU's role and how it differs from a PLC deployed the same way, HMI deployment models, the historian's distinct job from the live database, and the alarm management, trending, and reporting disciplines built on top of it — closing with the redundancy strategies that keep a supervisory system running through a single server or network failure.

By the end of this module you should be able to explain why an under-designed alarm system is treated as a genuine engineering defect rather than an operating nuisance, and why hot standby and cold standby redundancy exist as two deliberately different answers to the same failover problem.

Free related reading in this studio
→ RTU vs. PLC: What Each One Is Actually For→ Historian vs. SCADA Server: The Real Difference→ Hot Standby vs. Cold Standby Redundancy→ Polling vs. Report-by-Exception→ SCADA System Designer

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