Master station and HMI in SCADA systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the main function of a Master Station in SCADA.

SCADA systems

def master_station():
    # The Master Station collects data and sends commands to remote units
    [1]

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Alog_errors()

Bsend_alerts()

Cdisplay_graphics()

Dcollect_data()

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing display or logging functions instead of data collection.

The Master Station primarily collects data from remote units to monitor the system.

2fill in blank

medium

Complete the code to show how the HMI displays data received from the Master Station.

SCADA systems

def hmi_display(data):
    # Display the received data on the screen
    [1](data)

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Arender_screen

Bsend_command

Cprocess_data

Dlog_data

Attempts:

3 left

💡 Hint

Common Mistakes

Using functions that send commands or log data instead of displaying.

The HMI uses render_screen to show data visually to the user.

3fill in blank

hard

Fix the error in the code that sends a command from the Master Station to a remote unit.

SCADA systems

def send_command_to_remote(command):
    # Send command to remote unit
    remote_unit.[1](command)

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Areceive

Bsend

Cexecute

Dsend_command

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'receive' which is for incoming data, not sending.

The correct method to send data is send. 'send_command' or 'execute' are not standard methods here.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps device IDs to their status if the status is 'active'.

SCADA systems

active_devices = {device_id: status for device_id, status in devices.items() if status [1] [2]

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A==

B!=

C'active'

D'inactive'

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' or wrong status string causing wrong filtering.

The comprehension filters devices where status is exactly 'active' using the equality operator ==.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps uppercase device IDs to their status if the status is not 'inactive'.

SCADA systems

filtered_devices = { [1]: [2] for device_id, [3] in devices.items() if [3] [4] 'inactive'}

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Adevice_id.upper()

Bstatus

C!=

Ddevice_id

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing variable names or using wrong comparison operators.

The comprehension converts device IDs to uppercase, keeps the status, and filters out devices with status 'inactive' using '!='.