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About Cognite Charts

Charts is a powerful and speedy tool for engineers and domain experts to explore, trend, and analyze industrial data. It gives industrial experts instant access to data and no-code tools to find, understand and troubleshoot for actionable insights.

If you are doing routine tasks or troubleshooting complex issues where you need access to industrial data, Charts makes this fast, repeatable and collaborative - in one tool. You can find and work with any time series or contextualized P&ID in your organization's Cognite Data Fusion (CDF). You can also find and analyze data from other Cognite applications for a seamless collaborative experience.

Watch this video for a quick introduction to Charts:

Explore data

Charts helps you explore contextualized data from Cognite Data Fusion to find the time series you want to plot.

Start a new chart or open a private or public chart on the Overview page. A private chart is only visible to the one who created it, while public charts are visible to the whole organization. Select the blue + button to get started.

add time series Search panel

Use the Equipment tag tab to search for the asset tag related to the time series you're interested in or the Time series ID tab to search for a specific time series.

You can also search for an externalId (which may be different from the name) for a time series or asset/equipment tag in the search bar. Charts will automatically display the result at the top of the list. Note that externalId requires an exact match.

If an asset is found in one or more P&IDs, you can select the icon next to the result to open the P&ID.

You can also add time series data directly from the P&ID to your chart.

Below the chart, you can see all the time series that you have added to the chart. You can rename, remove, and change units for each time series. Also, you can adjust the thickness and color of the line and select dotted or dashed lines. To show or hide a time series, click the Show / hide eye icon in the second column of the row.

Icon

Use the search icon to open the related P&IDs. Select the information icon to zoom into functions and constants.

All vertical y-axes are interactive and can be independently moved. Use click+hold and drag or scale in and out by hovering over each horizontal axis and scrolling using your mouse. This functionality enables fast stacking, overlay, and comparison of trends of multiple time series. Navigate between current and historical data with the Last year, Last 6 or 1 month, Last week, and Last 1 or 2 days buttons, or set a specific time and date in the calendar.

Calculations and analysis

Troubleshooting and working on root cause analysis often require calculations ranging from basic algebra to more advanced algorithms. You can apply these calculations to one or multiple time series, and the results are directly available in the chart.

To start a new calculation, click the blue + button and select Add calculation, and a new line is added with an fx icon representing the new calculation. When the node editor opens, right-click in the grey work area and add one or more inputs (sources) to get started.

Calculations

By default, Automatic data alignment is enabled for all calculations, which uses an algorithm to ensure that data in calculations are automatically aligned (resampled and reindexed). If you want to define and set up your own resampling and reindexing parameters, turn off Automatic data alignment. You can manually add resampling or reindexing function nodes into any given calculation and define the parameters yourself.

Align

Constants and functions

Constants and functions

Right-click in the work area to add constants or functions to the calculation. Select i to view the function details or hover over the parameters to view more information.

Pipe the calculations together in the right order, including the final Output node, to complete the computational graph. This will trigger the calculation to run, and the results will be visualized on the chart plot. When a valid calculation is connected with an output calculation, the calculation runs automatically.

Whenever an input source, a parameter, or the time frame in the chart is changed, the calculation is refreshed and shown in the graph. Adjust input parameters and constants values at any time by double-clicking a function or constant.

Calculations in the list are valid inputs to a new calculation, which means you can divide the calculation steps into several separate calculations and see the output of each calculation step.

Thresholds on historical data

Thresholds icon

Use thresholds to check whether a time series has crossed a given value while looking at historical data and for how long it crossed this threshold. You can set thresholds for checking whether a time series or calculation is Over, Under, and Between any given values. The result of the threshold, when a time series or calculation crosses a given threshold, is visualized on the chart plot.

Select Thresholds in the tools list on the right-hand sidebar to get started.

Find and visualize events on the chart plot

Events icon

Events are a critical and relevant resource when working with time series data in CDF. You can display events in charts to perform industrial time series analytics, whether it's a work order on related equipment or a faulty shutdown.

Select Events in the tools list on the right-hand sidebar to create a filter group to show the events that are most interesting to you. All events that match your filter parameters will be displayed on the plot for the current time range. If you move the plot and change the time range, your chart will refresh and display the updated results.

Select View results to see a list of all events that match your filter query. You can click on a particular event to highlight it in the plot. Select View details to view the full details and metadata for any event in your results.

Collaboration and sharing

Share

Charts can be private or public. You can share a link to public charts with co-workers with access to the Cognite Charts project . All users in your organization can see the charts under Public charts on the Overview page.

Only the owner of a chart can save changes made to Public charts. To save changes to a chart you don't own, duplicate the chart with the Duplicate option on the Actions menu and save changes to the duplicated chart.

You can use duplicated charts to create template charts with pre-selected time series and calculations that you can reuse when performing troubleshooting or root cause analysis and share with your team.