Alarm suppression and shelving in SCADA systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to suppress alarms temporarily.

SCADA systems

alarm.suppress([1])

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

Aduration=60

Bduration=30

Cduration=10

Dduration=5

Attempts:

3 left

💡 Hint

Common Mistakes

Using too short or too long duration values that don't fit typical suppression needs.

The duration=60 sets the alarm suppression for 60 seconds, which is a common temporary suppression time.

2fill in blank

medium

Complete the code to shelve an alarm with a reason.

SCADA systems

alarm.shelve(reason=[1])

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

A"error"

B"maintenance"

C"urgent"

D"resolved"

Attempts:

3 left

💡 Hint

Common Mistakes

Using reasons that do not explain shelving, like "error" or "resolved".

Using "maintenance" as the reason clearly indicates the alarm is shelved due to planned work.

3fill in blank

hard

Fix the error in the shelving command to include a valid duration.

SCADA systems

alarm.shelve(duration=[1])

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

A120

BNone

C-30

D"two hours"

Attempts:

3 left

💡 Hint

Common Mistakes

Using negative numbers, strings, or None as duration.

The duration must be a positive integer representing seconds. 120 seconds is valid.

4fill in blank

hard

Fill both blanks to suppress and shelve an alarm with a reason and duration.

SCADA systems

alarm.suppress([1])
alarm.shelve(reason=[2])

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

Aduration=45

B"testing"

C"maintenance"

Dduration=15

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up durations or using unclear shelving reasons.

Suppressing for 45 seconds and shelving with reason "maintenance" is a common practice during planned work.

5fill in blank

hard

Fill all three blanks to create a dictionary of alarms with their suppression duration and shelving reason.

SCADA systems

alarm_settings = { [1]: [2] for alarm in alarms if alarm.status == 'active' and alarm.shelved == [3] }

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

Aalarm.id

Balarm.suppression_duration

CFalse

Dalarm.reason

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong keys or filtering shelved alarms incorrectly.

This dictionary maps active alarms (not shelved) by their ID to their suppression duration.