Edge computing in SCADA in SCADA systems - Mini Project: Build & Apply

Edge Computing in SCADA

📖 Scenario: You work as a technician managing a SCADA system for a water treatment plant. The plant uses edge computing devices to collect sensor data locally before sending summaries to the central control system. This helps reduce network load and speeds up response times.

🎯 Goal: Build a simple program that simulates collecting sensor readings at the edge, filters important data based on a threshold, and prepares a summary report to send to the central SCADA system.

📋 What You'll Learn

Create a dictionary called sensor_readings with exact sensor names and their numeric readings.

Add a variable called threshold to filter sensors with readings above this value.

Use a dictionary comprehension to create filtered_readings with sensors exceeding the threshold.

Print the filtered_readings dictionary as the final output.

💡 Why This Matters

🌍 Real World

Edge computing in SCADA systems helps process sensor data locally to reduce network traffic and improve response times in industrial control environments.

💼 Career

Understanding how to filter and summarize sensor data at the edge is important for SCADA technicians and engineers working with modern industrial IoT and automation systems.

1

Create sensor readings dictionary

Create a dictionary called sensor_readings with these exact entries: 'temp_sensor': 72, 'pressure_sensor': 45, 'flow_sensor': 88, 'level_sensor': 30.

SCADA systems

# Create the sensor_readings dictionary with the given sensor names and values
# Your code here

Hint

Use curly braces {} to create a dictionary with the exact sensor names as keys and their readings as values.

2

Add threshold variable

Add a variable called threshold and set it to 50 to filter sensor readings.

SCADA systems

sensor_readings = {'temp_sensor': 72, 'pressure_sensor': 45, 'flow_sensor': 88, 'level_sensor': 30}
# Add the threshold variable with value 50
# Your code here

Hint

Just create a variable named threshold and assign it the number 50.

3

Filter readings above threshold

Use a dictionary comprehension to create a new dictionary called filtered_readings that includes only sensors from sensor_readings with values greater than threshold.

SCADA systems

sensor_readings = {'temp_sensor': 72, 'pressure_sensor': 45, 'flow_sensor': 88, 'level_sensor': 30}
threshold = 50
# Create filtered_readings dictionary using comprehension
# Your code here

Hint

Use {sensor: value for sensor, value in sensor_readings.items() if value > threshold} to filter the dictionary.

4

Print filtered readings

Print the filtered_readings dictionary to display the sensors with readings above the threshold.

SCADA systems

sensor_readings = {'temp_sensor': 72, 'pressure_sensor': 45, 'flow_sensor': 88, 'level_sensor': 30}
threshold = 50
filtered_readings = {sensor: value for sensor, value in sensor_readings.items() if value > threshold}
# Print the filtered_readings dictionary
# Your code here

Hint

Use print(filtered_readings) to show the filtered dictionary.

Practice

1. What is the main benefit of using edge computing in SCADA systems?

easy

A. It processes data close to machines for faster response.

B. It stores all data in a central cloud server.

C. It eliminates the need for any network connections.

D. It replaces all human operators with robots.

Solution

1. Step 1: Understand edge computing role

   Edge computing means processing data near the source, like machines, not far away in the cloud.

2. Step 2: Identify main benefit in SCADA

   This local processing speeds up control and response times, which is critical for SCADA systems.

3. Final Answer:

   It processes data close to machines for faster response. -> Option A

4. Quick Check:

   Edge computing = faster local processing [OK]

Hint: Edge computing means processing near machines, not far away [OK]

Common Mistakes:

• Thinking edge computing stores all data centrally
• Assuming it removes network needs completely
• Confusing edge computing with full automation

2. Which of the following is the correct way to configure an edge device IP address in a SCADA system?

easy

A. ip address 192.168.1.10 255.255.255.0

B. set ip 192.168.1.10 mask 255.255.255.0

C. ipconfig 192.168.1.10 255.255.255.0

D. address ip 192.168.1.10/24

Solution

1. Step 1: Recognize standard IP config syntax

   In many SCADA edge devices, the command to set IP is 'ip address' followed by IP and subnet mask.

2. Step 2: Compare options

   ip address 192.168.1.10 255.255.255.0 matches this syntax exactly. Others use incorrect or non-standard commands.

3. Final Answer:

   ip address 192.168.1.10 255.255.255.0 -> Option A

4. Quick Check:

   Standard IP config command = ip address 192.168.1.10 255.255.255.0 [OK]

Hint: Look for 'ip address' followed by IP and mask [OK]

Common Mistakes:

• Using 'set ip' which is not standard
• Confusing with Windows 'ipconfig' command
• Using slash notation without proper command

3. Given this simplified SCADA edge script snippet:

data = [10, 20, 30]
processed = [x * 2 for x in data if x > 15]
print(processed)

What will be the output?

medium

A. [40, 60, 20]

B. [20, 40, 60]

C. [20, 30]

D. [40, 60]

Solution

1. Step 1: Understand list comprehension with condition

   The list comprehension multiplies each x by 2 only if x > 15.

2. Step 2: Apply condition to data list

   Data is [10, 20, 30]. Values > 15 are 20 and 30. Multiply each by 2 gives [40, 60].

3. Final Answer:

   [40, 60] -> Option D

4. Quick Check:

   Filter x > 15 then multiply by 2 = [40, 60] [OK]

Hint: Filter first, then multiply in list comprehension [OK]

Common Mistakes:

• Multiplying all values without filtering
• Including values <= 15 by mistake
• Mixing original and processed values

4. A SCADA edge device is not sending data to the central server. Which fix is most likely correct?

medium

A. Remove all sensors connected to the edge device.

B. Change the device IP to 0.0.0.0.

C. Restart the edge device and check network cables.

D. Disable the firewall on the central server permanently.

Solution

1. Step 1: Identify common network troubleshooting steps

   Restarting devices and checking cables are basic fixes for connectivity issues.

2. Step 2: Evaluate other options

   Changing IP to 0.0.0.0 disables communication, disabling firewall permanently is unsafe, removing sensors stops data generation.

3. Final Answer:

   Restart the edge device and check network cables. -> Option C

4. Quick Check:

   Basic network fix = restart and check cables [OK]

Hint: Restart and check cables first for network issues [OK]

Common Mistakes:

• Setting IP to 0.0.0.0 disables communication
• Disabling firewall permanently risks security
• Removing sensors stops data collection

5. You want to ensure a SCADA edge device processes sensor data locally and sends only alerts to the central server to reduce bandwidth. Which approach is best?

hard

A. Send all raw sensor data continuously to the central server for processing.

B. Configure the edge device to filter data and send alerts only when thresholds are exceeded.

C. Disable edge processing and rely on manual checks by operators.

D. Use the edge device only as a backup storage without processing.

Solution

1. Step 1: Understand bandwidth reduction via edge processing

   Processing data locally and sending only important alerts reduces network load.

2. Step 2: Evaluate options for best practice

   Configure the edge device to filter data and send alerts only when thresholds are exceeded. filters data locally and sends alerts only, which fits the goal. Others either send all data or disable processing, increasing bandwidth or losing benefits.

3. Final Answer:

   Configure the edge device to filter data and send alerts only when thresholds are exceeded. -> Option B

4. Quick Check:

   Local filtering + alert sending = bandwidth saving [OK]

Hint: Filter locally, send alerts only to save bandwidth [OK]

Common Mistakes:

• Sending all raw data wastes bandwidth
• Disabling processing loses edge benefits
• Using edge device only for storage misses control