Distributed SCADA architecture in SCADA systems - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Distributed SCADA architecture?

Distributed SCADA architecture is a system design where control and monitoring functions are spread across multiple interconnected computers or nodes instead of a single central system. This improves reliability and scalability.

beginner

Name two main advantages of Distributed SCADA architecture.

1. Increased system reliability because failure in one node does not stop the entire system.<br>2. Better scalability as new nodes can be added without major changes.

intermediate

What role do Remote Terminal Units (RTUs) play in Distributed SCADA?

RTUs collect data from sensors and send it to local or central control units. In distributed SCADA, RTUs communicate with multiple control nodes to share data and commands.

intermediate

How does Distributed SCADA improve system fault tolerance?

By distributing control and data processing across multiple nodes, if one node fails, others continue working. This prevents total system shutdown and allows quick recovery.

beginner

What is a common communication method used in Distributed SCADA systems?

Common communication methods include Ethernet networks, fiber optics, and wireless links that connect nodes securely and reliably for real-time data exchange.

What is the main difference between centralized and distributed SCADA architectures?

A Distributed SCADA does not use RTUs; centralized SCADA does.

B Centralized SCADA uses multiple control centers; distributed SCADA uses only one.

C Distributed SCADA spreads control across multiple nodes; centralized SCADA uses one main control center.

D Centralized SCADA is only for small systems; distributed SCADA is only for large systems.

Distributed SCADA spreads control and data processing across multiple nodes, while centralized SCADA relies on a single main control center.

Which of the following is a key benefit of Distributed SCADA?

A Improved fault tolerance

B Single point of failure

C Limited scalability

D Slower data processing

Distributed SCADA improves fault tolerance by avoiding a single point of failure.

In Distributed SCADA, what device typically collects data from sensors?

A PLC (Programmable Logic Controller)

B RTU (Remote Terminal Unit)

C HMI (Human Machine Interface)

D SCADA Server

RTUs collect data from sensors and send it to control nodes in SCADA systems.

Which communication method is commonly used in Distributed SCADA systems?

A Infrared signals

B Bluetooth only

C Dial-up modems

D Ethernet networks

Ethernet networks are commonly used for reliable and fast communication in Distributed SCADA.

How does Distributed SCADA architecture affect system scalability?

A It allows easy addition of new nodes without major changes.

B It reduces the number of nodes possible.

C It requires complete redesign to add nodes.

D It limits scalability due to centralized control.

Distributed SCADA allows easy scaling by adding new nodes without major system redesign.

Explain how Distributed SCADA architecture improves system reliability compared to centralized SCADA.

Think about what happens if one part of the system stops working.

Describe the role of communication networks in Distributed SCADA systems.

Consider how different parts of the system talk to each other.