What is an assignment?
An assignment connects the raw data from a data source or measurement device with a measuring point. Any number of assignments to different data sources can be made for each measuring point.
An assignment has a start time point and an optional end point. This allows for the range that is of interest to be selected from the raw data of the data source.
Each assignment corresponds to the input channel of a measuring point. An input channel can however be fed from the data of several assignments, which then do not overlap in time.
Depending on the measuring point type, filters, offsets and pre-processing formulae can be defined per assignment.
BEST PRACTICE: Replacing sensors
If a sensor or measurement device malfunctions, then assignments to the defective device should not be deleted, but rather an end date should be set instead.
An assignment with the same name can then be created by the replacement device so that the input channel of the measuring point is retained.
A possible offset can be specified manually or determined automatically.
Advantages
All diagrams, calculations and evaluations remain unchanged despite the sensor being replaced and do not need to be updated.
At the same time, the replacement of the sensor is documented in the assignment table.