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Scada Systems - Coggle Diagram
Scada Systems
Functional levels of control operation
Level 0: Field Level
Sensors and actuators/final control elements
Level 1: Direct Control
Input/output Modules and their processors
PLCs/RTUs
Advantages of PLC/DCS Systems
The computer can record and store a very large amount of
The data can be displayed in any way the user requires
Thousands of sensors over a wide area can be connected to system
The operator can incorporate real data simulations into the system
Many types of data can be collected from the RTUs
The data can be viewed from anywhere, not just on site
Disadvantages of PLC/DCS Systems
The operator can see only as far as the PLC
With thousands of sensors there is still a lot of wire to deal with
Different operating skills are required, such as system analysts and programmer
The system is more complicated than the sensor to panel type
Level 2: Plant Supervisory
Supervisory computers, operator control screens
Level 3: Production Control
Monitoring production targets
Level 4 : Production Scheduling
Scada architechture and development
First generation: "monolithic“
Network services did not exist .SCADA systems were independent systems with no connectivity to other systems.
Second generation: "distributed“
SCADA information and command processing was distributed across multiple stations which were connected through a LAN. No standard protocol.
Third generation: "networked“
The system can be connected using several LAN networks through process control network PCN and separated geographically.
Fourth generation: "Internet of things“
With the help of cloud computing , SCADA systems have increasingly adopted Internet of things technology