Sensors & actuators
Measurements such as temperature, pressure, flow, voltage and level, plus the equipment that carries out physical commands.
Supervisory Control & Data Acquisition
Give decision-makers and operators a dependable view of the operation.
Define SCADA around the assets being monitored, the decisions people need to make and the control authority the organisation is prepared to provide.
SCADA connects the field with the control room.
A SCADA system gathers information from equipment and processes, communicates it to a central environment and presents it through a Human–Machine Interface.
Operators can monitor conditions, acknowledge alarms, review trends and issue permitted commands. Managers and engineers can gain a clearer view of recurring events and asset behaviour—provided the data, communications and displays are designed around real operational needs.
System architecture
The four main parts of SCADA.
ISC Controls helps clarify the role, boundary and failure behaviour of each layer.
PLCs & RTUs
Local control and data acquisition, including the boundary between local autonomy and supervisory control.
Communications
Ethernet, fibre, cellular, radio or satellite links using protocols such as Modbus, DNP3, IEC 60870-5-104 and OPC UA.
SCADA software & HMI
Displays, alarms, trends, events, reports, user roles and the controls operators are permitted to use.
What we clarify
Design the system around decisions and failure scenarios.
Screen counts and tag lists are outputs. The engineering starts with users, functions and constraints.
Assets, sites, processes and users in scope
Monitoring versus control responsibility
Data quality, update and historian needs
Alarm priority and response expectations
PLC, RTU, package and instrument interfaces
Communications and failure behaviour
Remote access and cybersecurity controls
Migration, cutover, training and handover
Common applications
Central visibility across industrial and distributed assets.
Power, water, oil and gas, manufacturing, transportation and renewable-energy operations all use SCADA to connect field conditions with operating decisions.