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Structure of a SCADA system and its components

ESTRUCTURA Y COMPONENTES DE UN SCADA
ESTRUCTURA Y COMPONENTES DE UN SCADA

Structure of a SCADA system

The structure of a SCADA, could be separated between:

  • monitoring layer
  • data processing layer
  • data acquisition layer

Within the supervision layer there can be the elements:

  • Supervision client or operator screen.
  • Development Client or Development Station.

Within the data processing layer:

  • Intercommunication system between the different stations
  • Alarm System.
  • Reporting system (optional)
  • Historization System (optional)

Within the data acquisition layer:

  • Communication drivers,
  • Elements to communicate with other software such as OPC servers, databases, APIs,…
SCADA

Components of a SCADA system

Generally a SCADA system has these components:

  • Controllers or communication drivers: In charge of reading/writing data from physical elements such as PLCs, RTUs, sensors,….
  • Central Server or Application Server: Responsible for managing communications between all elements of the SCADA system.
  • Historian: Element in charge of storing data in a temporary format to be able to consult them later.
  • Supervision client: Interface between people and the SCADA system, to monitor and modify/control system signals in real time.
  • Development client: Operator interface to modify SCADA configurations.

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