SMA SC 500HE-20 - Manual (Page 44)

6 Setpoint for Active Power and Reactive Power SMA Solar Technology AG
44 SCxxxHE-20-BE-BEN111210 Operating Manual
6.1.9 Active Power Limitation Depending on Power Frequency
In addition to the procedures for limiting active power that can be chosen using the "P-WMod"
parameter, active power can be limited depending on the power frequency.
The active power limitation dependent on power frequency is set using the "WCtlHzMod" parameter.
When limiting active power dependent on power frequency, the Sunny Central constantly checks the
connected power frequency.
Figure 14: Behavior of the Sunny Central when exceeding the "P-HzStr" frequency limit
ComFail The "WCtlCom" procedure has been
chosen and the expected signal with a
valid active power limitation has been
absent for at least 5 minutes. • Check if SC-COM is working.
• Make sure the SC-COM can be
accessed externally and is
displaying the data of the inverter.
• Check if the cables between the
SC-COM and the inverters are
OK.
• Check if the cables inside the
SC-COM are OK.
AnInFail The "WCnstNomAnIn" procedure has
been chosen and the value measured at
the analog input is less than 2 mA. • Check the analog input.
Display Description Measure