Variable 1, Function, Activated – SMA Sunny Boy Control User Manual
Page 118: Name, Pacmax, Unit, Formula, Max([pac])
Sunny Boy Control
SMA Technologie AG
User Manual
SUNBC-14:NE0206
114
You’re measuring Iac (the current in ampere) with AIN-1 and Vac (the
voltage in volts) with AIN-2 on the AC side. Using two variables, Pac (the
power output in watts) can be calculated, and using integration, Eac (the
energy in kWh) can be calculated. One kilowatt being 1,000 watts and
one hour being 3,600 seconds, Ws are converted into kWh by division
through 3.6E6 (corresponding to 1000 * 3600).
AIN-1: +Iac, A
AIN-2: +Uac, V
VAR-1: +Pac, W, =[Iac]*[Uac]
VAR-2: +Eac, kWh, =INT([+Pac]/3.6E6)
Hardware-Based Configuration
[ Variable 1 ]
Function…
Function of the variable
…activated
deactivated,
activated
---------------Š
Name…
………+PacMax
Name of the channel
Unit…
…………………kW
Measuring unit
Formula…
…=MAX([Pac])
Formula to be calculated
Fig. 7.20: Configuration of variables