SMA SC 500HE-20 - Manual (Page 42)

6 Setpoint for Active Power and Reactive Power SMA Solar Technology AG
42 SCxxxHE-20-BE-BEN111210 Operating Manual
6.1.3 "Off" Procedure
Feed-in power is limited to the "Pmax" parameter.
The "Pmax" parameter defines the inverter power at the feed-in point and is adjusted to the local
conditions during commissioning. Before the "Pmax" parameter can be changed, the device must be
in the "Stop" operating state and the installer password must be entered.
6.1.4 "WCtlCom" Procedure
The target value for the active power limitation is received by the SC-COM via the Power Reducer
Box and then forwarded to the Sunny Central. If the Sunny Central has received no signal for
5 minutes, the error message will be displayed in the "P-WModFailStt" spot value.
6.1.5 "WCnst" Procedure
The active power limitation is entered as an absolute value using the "P-W" parameter.
The "P-W" parameter defines the active power to be fed in. The "P-W" parameter can be changed
during feed-in operation. The "P-W" parameter may not be greater than the "Pmax" parameter.
6.1.6 "WCnstNom" Procedure
Active power limitation is set as a percentage value using the "P-WNom" parameter. The percentage
value refers to the "Pmax" parameter.
The "P-WNom" parameter indicates the percentage of maximum possible power to be fed in. The
"P-WNom" parameter can be changed during feed-in operation.
Used parameters Pmax
Used parameters None
Used parameters P-W
Used parameters P-WNom