For energy evaluation, e.g. top consumer element in CONTROL L, it is necessary to convert the existing current measured values into energy values, e.g. kWh. This conversion is carried out with the logic group. The accuracy of the values is determined by the measuring interval.

Irrespective of the measuring interval, the calculation is performed internally every second. Smaller measuring intervals are therefore not taken into account. The logic group has a power output W. A statistics element is used to output the average value at 15s intervals in order to smooth out large fluctuations (jumps).
(The Top consumer element can be found in the CONTROL L visualisation of the EIBPORT).

The energy values are output as:
- Counter value (without time interval)
- Calculation daily consumption
- Calculation weekly consumption
A monthly or annual consumption would have to be determined in the same way.

Input values:
- Current measurement in A (EIS9, 4 byte float)
- Voltage measurement in V (either flat fixed value 230 V with input correction) (EIS9, 4 byte float) or also measured value

Initial values:
- Power display W (EIS9, 4 byte float)
- Energy meter kWh (EIS9, 4 byte float)
- Daily energy consumption kWh (EIS9, 4 byte float)
- Weekly energy consumption kWh (EIS9, 4 byte float)

Uwe Müller
Haus-Bus-Systeme.de
(223; 2022.06)