Energy management reporting in SCADA systems - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

SCADA Command Output: Energy Data Query

What is the output of the following SCADA system command that queries total energy consumption for the last hour?

SCADA systems

query_energy --start "2024-04-26T13:00:00Z" --end "2024-04-26T14:00:00Z" --metric total_consumption

A {"total_consumption_kWh": 1250}

B SyntaxError: missing argument for --metric

C {"total_consumption_kWh": 0}

D {"total_consumption_kWh": "error: invalid time range"}

💡 Hint

Check the time range and metric parameter correctness.

The command queries total energy consumption between the specified times and returns the numeric value in kWh.

❓ Configuration

intermediate

Configuring Energy Reporting Interval

Which configuration snippet correctly sets the energy reporting interval to 15 minutes in a SCADA system YAML config?

A

reporting:
  interval: 900
  metric: energy_consumption

B

reporting:
  interval: "15 minutes"
  metric: energy_consumption

C

reporting:
  interval: 15m
  metric: energy_consumption

D

reporting:
  interval: 15
  metric: energy_consumption

💡 Hint

Look for the correct time format for interval in minutes.

The SCADA config expects interval in minutes with 'm' suffix for minutes.

❓ Troubleshoot

advanced

Troubleshooting Missing Energy Data in Reports

A SCADA energy report shows zero values for all sensors despite active data collection. What is the most likely cause?

A The report file path is incorrect.

B The data collection service is stopped or crashed.

C The sensors are configured to report in a different unit.

D The report interval is set too short to collect data.

💡 Hint

Zero values usually mean no data was collected, not just a display issue.

If the data collection service is down, no data is gathered, resulting in zero values in reports.

🔀 Workflow

advanced

Energy Report Generation Workflow

Which sequence correctly describes the workflow to generate a daily energy consumption report in a SCADA system?

A 1,2,3,4

B 2,1,3,4

C 1,3,2,4

D 4,3,2,1

💡 Hint

Think about the logical order from data collection to report delivery.

Data must be collected first, then aggregated, then reported, then distributed.

✅ Best Practice

expert

Best Practice for Energy Data Backup in SCADA

What is the best practice to ensure energy consumption data is safely backed up in a SCADA system?

A Rely on cloud storage without local backups for cost savings.

B Manually copy data files weekly to a local USB drive.

C Store backups only on the same SCADA server to reduce latency.

D Schedule automated backups to a remote server daily with verification.

💡 Hint

Consider reliability, automation, and verification in backup strategies.

Automated remote backups with verification ensure data safety and availability.

Practice

1. What is the main purpose of energy management reporting in SCADA systems?

easy

A. To track and display energy usage clearly

B. To control machine speed directly

C. To backup system configurations

D. To monitor network traffic

Solution

1. Step 1: Understand energy management reporting

   Energy management reporting focuses on tracking and showing energy use clearly to help users understand consumption.

2. Step 2: Compare options to purpose

   Options A, B, and D relate to backup, control, and network, which are not the main goals of energy reporting.

3. Final Answer:

   To track and display energy usage clearly -> Option A

4. Quick Check:

   Energy reporting = clear energy tracking [OK]

Hint: Energy reports show usage clearly, not control or backup [OK]

Common Mistakes:

• Confusing reporting with control functions
• Thinking reports manage network or backups
• Ignoring the focus on energy data

2. Which of the following is the correct way to specify a time range for an energy report in a SCADA system configuration?

easy

A. "time-range": 24

B. "timerange": "24hours"

C. "time_range": "last_24_hours"

D. "time range" = "day"

Solution

1. Step 1: Identify correct JSON key and value format

   The correct key uses underscore and quotes: "time_range" and the value is a string like "last_24_hours".

2. Step 2: Check syntax correctness

   Options B, C, and D have syntax errors or wrong key formats (missing quotes, wrong separators).

3. Final Answer:

   "time_range": "last_24_hours" -> Option C

4. Quick Check:

   Correct JSON key and string value = "time_range": "last_24_hours" [OK]

Hint: Use quotes and underscores for JSON keys and string values [OK]

Common Mistakes:

• Missing quotes around keys or values
• Using spaces or dashes in keys incorrectly
• Using numbers without quotes for time ranges

3. Given this SCADA report configuration snippet:

{
  "data_source": "main_meter",
  "metrics": ["voltage", "current"],
  "time_range": "last_1_hour"
}

What data will the report show?

medium

A. Voltage and current data from the main meter for the last 24 hours

B. Voltage and current data from all meters for the last day

C. Only current data from the main meter for the last hour

D. Voltage and current data from the main meter for the last hour

Solution

1. Step 1: Analyze data_source and metrics

   The data_source is "main_meter" and metrics are ["voltage", "current"], so both voltage and current from main_meter are included.

2. Step 2: Check time_range value

   The time_range is "last_1_hour", so data is from the last one hour only.

3. Final Answer:

   Voltage and current data from the main meter for the last hour -> Option D

4. Quick Check:

   Metrics + source + time range match Voltage and current data from the main meter for the last hour [OK]

Hint: Match metrics, source, and time range exactly [OK]

Common Mistakes:

• Confusing time ranges (1 hour vs 24 hours)
• Ignoring the specified data source
• Selecting only one metric instead of both

4. You wrote this report schedule configuration:

{
  "schedule": "daily",
  "time": 25:00
}

What is the problem with this configuration?

medium

A. The time value 25:00 is invalid; hours must be 0-23

B. The schedule key should be "frequency" instead of "schedule"

C. The time value should be a number, not a string

D. The daily schedule is not supported in SCADA systems

Solution

1. Step 1: Check time format validity

   Time values must be in 24-hour format with hours from 0 to 23. 25:00 is invalid.

2. Step 2: Verify other keys and values

   The "schedule" key is valid, and daily schedules are supported. Time should be a string with quotes.

3. Final Answer:

   The time value 25:00 is invalid; hours must be 0-23 -> Option A

4. Quick Check:

   Invalid hour in time = The time value 25:00 is invalid; hours must be 0-23 [OK]

Hint: Use 24-hour time with hours 0-23 only [OK]

Common Mistakes:

• Using hours above 23 in time
• Omitting quotes around time string
• Confusing schedule key names

5. You want to create a weekly energy report that shows total energy consumption and average power for multiple meters, but only for weekdays. Which configuration snippet correctly sets this up?

hard

A. {
"data_source": "meter1,meter2",
"metrics": "total_energy,average_power",
"time_range": "weekdays",
"schedule": "weekly"
}

B. {
"data_source": ["meter1", "meter2"],
"metrics": ["total_energy", "average_power"],
"time_range": "last_7_days",
"filter": "weekdays"
}

C. {
"data_source": ["meter1", "meter2"],
"metrics": ["total_energy", "average_power"],
"time_range": "last_7_days",
"schedule": "weekdays"
}

D. {
"data_source": ["meter1", "meter2"],
"metrics": ["total_energy", "average_power"],
"time_range": "weekdays",
"filter": "last_7_days"
}

Solution

1. Step 1: Check data_source and metrics format

   { "data_source": ["meter1", "meter2"], "metrics": ["total_energy", "average_power"], "time_range": "last_7_days", "filter": "weekdays" } correctly uses a list for multiple meters and metrics, which is the proper format.

2. Step 2: Verify time_range and filter usage

   { "data_source": ["meter1", "meter2"], "metrics": ["total_energy", "average_power"], "time_range": "last_7_days", "filter": "weekdays" } uses "last_7_days" for time_range and "filter": "weekdays" to limit data to weekdays, which matches the requirement.

3. Step 3: Confirm schedule presence

   Schedule is not mandatory here; filtering weekdays within last 7 days is sufficient.

4. Final Answer:

   { "data_source": ["meter1", "meter2"], "metrics": ["total_energy", "average_power"], "time_range": "last_7_days", "filter": "weekdays" } -> Option B

5. Quick Check:

   Lists + last_7_days + weekdays filter = { "data_source": ["meter1", "meter2"], "metrics": ["total_energy", "average_power"], "time_range": "last_7_days", "filter": "weekdays" } [OK]

Hint: Use lists for multiple meters and filter weekdays explicitly [OK]

Common Mistakes:

• Using comma-separated strings instead of lists
• Mixing time_range and filter values incorrectly
• Confusing schedule with filter for weekdays