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SCADA Tutorials

SCADA systems give operators visibility and supervisory control over processes and assets that can be spread across a plant or across a whole region. These tutorials explain SCADA architecture and components, data acquisition and presentation, alarm management, configuration, applications and project delivery.

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1

Getting Started

  1. SCADA Introduction What SCADA is and how it works: the parts of a SCADA system (field devices, RTUs and PLCs, telemetry, SCADA servers, operator clients, historian), how data and commands travel, what SCADA does and does not do, where it is used, how it differs from DCS and PLC, and key terms.
  2. SCADA History and Evolution How SCADA developed: early telemetry and mimic panels, computer-based master stations in the 1960s and 1970s, PCs, LANs and open protocols (Modbus, DNP3, IEC 60870-5) in the 1980s and 1990s, internet-connected and web-based systems, MQTT and IIoT, and the rise of cybersecurity requirements, with a timeline.
  3. SCADA Role in Industrial Automation The role of SCADA in industrial automation: its core functions (data acquisition, visualisation, alarms, supervisory control, history), real benefits, limitations, and how it differs from PLCs, DCS and MES.
2

Core Components

  1. RTUs and PLCs in SCADA How RTUs and PLCs work as SCADA outstations: what a remote site controller does, RTU vs PLC differences and when to use each, substation gateways and IEDs, event buffering and time-stamping, power and environmental design, communication configuration, local control and fail-safe behaviour, security, and troubleshooting.
  2. SCADA Servers and Workstations What the SCADA supervisory computer (master station) consists of: SCADA and front-end communication servers, alarm and event, historian, web and interface servers; hot-standby and geographic redundancy; operator, web, mobile and video-wall clients; sizing inputs, licensing, virtualisation, hardening and troubleshooting.
  3. Telemetry Communications (DNP3, IEC 104) How wide-area SCADA systems communicate with remote sites: DNP3 and IEC 60870-5-101/104 features, Modbus in telemetry, IEC 61850 at substations, choosing radio, cellular, fibre or satellite links, redundancy, security and troubleshooting.
3

Architecture

  1. Modern SCADA Architecture How SCADA architecture evolved from monolithic and distributed systems to networked, web-based and IIoT architectures: components, redundancy, protocols, security and a practical migration roadmap.
  2. SCADA System Hierarchy How a SCADA system is organised in levels: field devices, RTUs and PLCs at remote sites, the telemetry network, the control centre (servers, operator clients, historian), backup control centres and the enterprise, mapped to ISA-95 and Purdue levels, with where each function belongs, what happens when a level fails, and security zones.
  3. Network Topologies Network topologies used in SCADA and how to choose them: redundant star networks in the control centre, rings at sites, and WAN telemetry topologies (point-to-point, point-to-multipoint radio, multi-drop serial, mesh, hub-and-spoke IP, fibre rings), with redundancy and path diversity, selection criteria, design rules and troubleshooting.
4

How SCADA Works

  1. Data Acquisition and Processing How SCADA systems acquire and process field data: the signal path from sensor to tag, polling vs report-by-exception, scan rates and poll-time estimates, timestamps, scaling and NAMUR NE 43 limits, deadbands, calculated tags, data quality and troubleshooting.
  2. Data Presentation How SCADA presents data beyond operator graphics: designing useful trends, dashboards for different audiences, shift and compliance reports, GIS map displays for utilities, web and mobile clients with safe access, data sources and performance, and common presentation mistakes.
  3. Control and Command Functions How SCADA supervisory control works safely: command types, the command and feedback path, local/remote selection, direct operate vs select-before-operate, interlocks and permissives in the controller, setpoint limits, communication-loss behaviour, access control and troubleshooting.
5

Programming & Configuration

  1. SCADA Software Programming and Configuration SCADA (Supervisory Control and Data Acquisition) software plays a crucial role in monitoring, controlling, and automating industrial processes.
  2. HMI Display Design (ISA-101) How to design SCADA and HMI displays operators can use under pressure: high-performance HMI principles, the ISA-101 lifecycle and style guide, colour and alarm conventions, display hierarchy, analog indicators and embedded trends, faceplates, navigation and common mistakes.
  3. Alarm Management (ISA-18.2) How to configure SCADA and HMI alarms that operators can act on: alarm types, deadbands and delays, priority by consequence and response time, shelving and suppression, remote notification, the ISA-18.2 lifecycle, performance metrics and troubleshooting alarm floods.
  4. SCADA Scripting A practical guide to SCADA and HMI scripting: scripting languages by platform, where scripts run and when they fire, good uses (reports, integration, HMI behaviour) and bad ones (control and interlocks), performance, error handling, security, version control and testing.
6

Benefits, Challenges & Examples

  1. Challenges and Risks The main risks in operating and extending SCADA systems, with causes and mitigations: cybersecurity of remote access and legacy protocols, unreliable telemetry, obsolete RTUs and cellular sunsets, data quality, alarm floods, integration, vendor lock-in, skills and physical security of remote sites, plus a security baseline checklist.
  2. Case Studies and Examples How SCADA is applied in water and wastewater, electricity and gas distribution, substations, pipelines, manufacturing plants, plant utilities and energy monitoring, and wind farms: architectures, protocols, design decisions and lessons learned.
7

Standards, Vendors & Projects

  1. SCADA Standards and Guidelines The standards that shape SCADA systems, organised by task and sector: telemetry protocols (DNP3/IEEE 1815, IEC 60870-5, IEC 61850, Modbus, OPC UA, MQTT), security (ISA/IEC 62443, IEC 62351, NIST SP 800-82, NERC CIP, NIS2), alarms and HMI (ISA-18.2, ISA-101), pipeline rules (API RP 1165, 1167, 1168, API 1164, 49 CFR control room management) and how to apply them.
  2. Top SCADA Vendors and Products A vendor-neutral overview of major SCADA and HMI platforms (Siemens, Rockwell, AVEVA, Schneider Electric, Inductive Automation, Proficy, Mitsubishi Electric Iconics, COPA-DATA, Honeywell, Yokogawa, ABB, Emerson) with objective selection criteria.
  3. Historian Software Compared A vendor-neutral guide to industrial historian software: current ownership, architecture and capabilities of AVEVA PI System and AVEVA Historian, Proficy Historian, AspenTech InfoPlus.21, Honeywell Uniformance PHD, Canary, Ignition, Siemens Process Historian, FactoryTalk Historian and time-series databases, with selection criteria and an evaluation plan.
  4. SCADA Project Process How a SCADA project runs from requirements to handover: requirements and site survey, communication and architecture design, standard site designs and point lists, procurement, configuration, factory and site acceptance tests, point-to-point checks with remote sites, cutover from an old system, handover and support, with deliverables, test content and common pitfalls.
8

Future & References

  1. References and Further Reading Verified SCADA learning resources: established books on SCADA, telemetry protocols, HMI design, alarm management and ICS security, plus the key standards and organisations to follow.