Create input nodes for any data sources you want to use in your expressions. These can be constant values, sensors, or the output of other analytics (virtual sensors).
To create a data source input node
Once you've added the node, you can check the data that will be used in the analytic by selecting
View Chart.
To create a constant value input node
This may be useful if you want to configure a calculation that does not use a sensor.
The interval used for the time series is the one set in the related output node.