Why HMI design affects operator effectiveness in SCADA systems - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the main screen title in the HMI configuration.

SCADA systems

screen_title = "[1]"

Drag options to blanks, or click blank then click option'

AAlert Monitor

BOperator Dashboard

CSystem Overview

DMain Control Panel

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a title that is too vague or unrelated to operator tasks.

The main screen title should clearly indicate the operator's dashboard for easy recognition.

2fill in blank

medium

Complete the code to set the color for warning messages in the HMI.

SCADA systems

warning_color = "[1]"

Drag options to blanks, or click blank then click option'

Ayellow

Bgreen

Cblue

Dred

Attempts:

3 left

💡 Hint

Common Mistakes

Using red which is usually reserved for errors or critical alerts.

Yellow is commonly used for warnings to catch attention without indicating immediate danger.

3fill in blank

hard

Fix the error in the HMI alarm configuration code by completing the missing keyword.

SCADA systems

if alarm_status == "active":
    display_[1](alarm_message)

Drag options to blanks, or click blank then click option'

Ahide

Blog

Calert

Dignore

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'log' which only records the message but does not notify the operator.

The function to show an alarm message should be 'display_alert' to notify the operator immediately.

4fill in blank

hard

Fill both blanks to create a filter that shows only critical alarms with high priority.

SCADA systems

filtered_alarms = [alarm for alarm in alarms if alarm.[1] == 'critical' and alarm.[2] > 7]

Drag options to blanks, or click blank then click option'

Alevel

Bpriority

Cstatus

Dtype

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing 'status' or 'type' with severity or priority.

Alarms are filtered by 'level' for critical status and 'priority' greater than 7 for high importance.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps sensor names to their values only if the sensor is active and value is above threshold.

SCADA systems

active_sensors = {sensor.[1]: sensor.[2] for sensor in sensors if sensor.[3] == True and sensor.value > threshold}

Drag options to blanks, or click blank then click option'

Aname

Bvalue

Cactive

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'status' instead of 'active' for the boolean check.

The dictionary keys are sensor names, values are sensor readings, filtered by active sensors.