Trend charts and historical data in SCADA systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start recording data points for trend charts.

SCADA systems

scada.start_trend_recording([1])

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Asensor_id

Bstart_time

Cdata_rate

Dchart_type

Attempts:

3 left

💡 Hint

Common Mistakes

Using start_time instead of sensor_id causes errors.

The start_trend_recording function requires the sensor_id to know which sensor's data to record.

2fill in blank

medium

Complete the code to fetch historical data for a given time range.

SCADA systems

history = scada.get_historical_data(sensor_id, [1])

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Aend_time

Bstart_time

Cdata_format

Dinterval

Attempts:

3 left

💡 Hint

Common Mistakes

Using end_time alone without start_time causes incomplete data.

The get_historical_data function needs the start_time to know from when to fetch data.

3fill in blank

hard

Fix the error in the code to correctly plot the trend chart.

SCADA systems

scada.plot_trend_chart(data, [1]='time', y_axis='value')

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Axaxis_data

Bxaxis

Cxaxis_label

Dx_axis

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect parameter names causes the chart not to display.

The correct parameter name is x_axis to specify the horizontal axis data.

4fill in blank

hard

Fill both blanks to filter historical data by sensor and time range.

SCADA systems

filtered_data = scada.filter_data([1], [2])

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Asensor_id

Bstart_time

Cend_time

Ddata_type

Attempts:

3 left

💡 Hint

Common Mistakes

Using data_type instead of time causes wrong filtering.

To filter data, you need the sensor_id and the end_time to define the range.

5fill in blank

hard

Fill all three blanks to create a summary of trend data with conditions.

SCADA systems

summary = { [3]['[1]']: [3]['[2]'] for [3] in data if [3]['[2]'] > threshold }

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Atimestamp

Bvalue

Ditem

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same variable name for key and loop causes errors.

The dictionary comprehension uses timestamp as key, value as value, and item as the loop variable.