SMA SC 200 - Manual (Page 55)

SMA Solar Technology AG Active Power Limitation
User Manual SC-BEN100262 55
10 Active Power Limitation
There are 3 different methods of limiting active power. You have the option of specifying a setpoint
via the ExtSolP analog input or via a Sunny WebBox in connection with a Power Reducer Box. You
can also set the limitation manually.
You also have the option of setting a frequency-dependent active power limitation. For more details,
please see Section 10.2 ”Active Power Limitation via Grid Frequency” (page 57).
10.1 Procedure for Setting Active Power Limitation
The "P-WMod" parameter is used to set the procedure for limiting active power. If you need help with
this, please contact the Sunny Central Service.
Proceed as follows:
1. Select "Device Set-up > Parameters >
Red.effect.pow. > P-WMod".
☑ The line below "P-WMod" starts to blink.
2. Select the required procedure for limiting active power with the [ ↓ ] button.
The following procedures can be selected:
3. Press [ENTER] twice to confirm the procedure.
☑ The required procedure for active power limitation has now been set.
Procedure Description
off Active power is limited to the device nominal power "Pmax".
WCtlCom The active power limit is received by the external control unit
(e.g. Power Reducer Box) and transmitted to the Sunny Central via
communication.
WCnst The "P-W" parameter is set in kW via the communication
(e.g. Sunny WebBox).
WCnstNom The "P-WNom" parameter is set as a percentage via the
communication (e.g. Sunny WebBox).
WCnstNomAnIn The active power limitation is set via a signal at the analog input
ExtSolP. The analog value is converted to a setpoint for power
limitation.