SCADAPLCHMI

SCADAPLCHMI is a proposed integrated automation architecture that combines SCADA, PLC, and HMI components into a unified stack for industrial control systems. The term reflects a contemporary emphasis on interoperable solutions where supervisory software, programmable logic controllers, and operator interfaces work together to monitor, control, and analyze industrial processes.

Core components include PLCs that execute control logic and interface with sensors and actuators using IEC 61131-3 languages; SCADA software that provides real-time monitoring, alarming, data logging, and supervisory control; and HMIs that deliver local or edge operator interfaces. Connectivity is enabled by industrial networks and middleware, commonly using OPC UA, Modbus, or DNP3, with standardized data models to enable cross-layer communication.

Architecture typically features field devices connected to PLCs, with PLCs reporting to the SCADA layer over standardized protocols. HMIs connect to SCADA or PLCs to present information to operators. A data historian stores process data, while edge analytics and redundancy enhance resilience. Security zones, access control, and network segmentation are integral elements of the design.

Applications and benefits include simplifying deployment, reducing integration costs, and enabling unified data analytics across manufacturing, energy, water, and critical infrastructure projects. The approach supports scalable architectures from small facilities to enterprise-wide deployments and facilitates consistent monitoring and control across disparate assets.

Standards and related topics: The SCADAPLCHMI approach aligns with IEC 61131-3 for PLC programming, OPC UA for data exchange, and ISA-95 for enterprise-control integration. Interoperability relies on common data models, naming conventions, and compatible interfaces.

See also: SCADA, PLC, HMI, OPC UA, Modbus, DNP3, ISA-95, IEC 61131-3.