OPC (OLE for Process Control) in SCADA systems - Mini Project: Build & Apply

Basic OPC Data Reading Simulation

📖 Scenario: You are working with a simple SCADA system that uses OPC (OLE for Process Control) to read sensor data from a factory floor.The system needs to store sensor readings, configure a threshold for alerts, filter readings above the threshold, and finally display the filtered data.

🎯 Goal: Build a small program that simulates reading OPC sensor data, sets a threshold, filters the data based on this threshold, and prints the filtered sensor readings.

📋 What You'll Learn

Create a dictionary named sensor_data with exact sensor names and values

Add a variable named threshold with a specific numeric value

Use a dictionary comprehension named filtered_data to keep sensors with values above the threshold

Print the filtered_data dictionary

💡 Why This Matters

🌍 Real World

In real SCADA systems, OPC is used to collect sensor data from machines and processes. Filtering sensor data helps operators focus on important alerts.

💼 Career

Understanding how to handle OPC data and filter sensor readings is useful for roles in industrial automation, process control, and SCADA system maintenance.

1

Create initial OPC sensor data dictionary

Create a dictionary called sensor_data with these exact entries: 'Temperature': 75, 'Pressure': 120, 'Humidity': 40, 'FlowRate': 30

SCADA systems

# Create the sensor_data dictionary with given sensor readings
# Your code here

Need a hint?

Think of sensor_data as a list of sensors with their current readings.

2

Set the alert threshold value

Add a variable called threshold and set it to the number 50

SCADA systems

sensor_data = {'Temperature': 75, 'Pressure': 120, 'Humidity': 40, 'FlowRate': 30}
# Set the threshold value
# Your code here

Need a hint?

The threshold helps decide which sensor readings are important enough to alert.

3

Filter sensors with readings above threshold

Use a dictionary comprehension to create filtered_data that includes only sensors from sensor_data with values greater than threshold

SCADA systems

sensor_data = {'Temperature': 75, 'Pressure': 120, 'Humidity': 40, 'FlowRate': 30}
threshold = 50
# Create filtered_data dictionary with sensors above threshold
# Your code here

Need a hint?

Think of filtering like choosing only the sensors that need attention.

4

Display the filtered sensor readings

Write a print statement to display the filtered_data dictionary

SCADA systems

sensor_data = {'Temperature': 75, 'Pressure': 120, 'Humidity': 40, 'FlowRate': 30}
threshold = 50
filtered_data = {sensor: value for sensor, value in sensor_data.items() if value > threshold}
# Print the filtered_data dictionary
# Your code here

Need a hint?

The output shows only sensors with readings above the threshold.