In order to provide measured energy consumption, either current values or aggregated values (counters), the information model enables to create Objects of ObjectType EnergyMeasurementType with potentially several measurements measured at the same point in a system represented by Variables of VariableType EnergyMeasurementValueType. Those Objects may have a Method to reset the aggregated values. How those Objects are connected to other parts of an information model (e.g., for a device or a machine) is not addressed by this specification. The EnergyMeasurementValueType provides additional meta data of the measurement like the engineering unit.
In Figure 8, an overview of the EnergyMeasurementType and the EnergyMeasurementValueType is given. They are formally defined in 7.1.1 and 8.1.
Figure 8 – Overview EnergyMeasurementType and EnergyMeasurementValueType
In Figure 9, an example of the usage of those TypeDefinitions is given. The “X:SampleObject” contains two instances of EnergyMeasurementType, one measuring the electrical power and one the air extraction. Both contain different measurement values, like pressure, volume, and temperature.
