SMA SC 500CP-10-JP - Manual (Page 52)

8 Power Control SMA Solar Technology AG
52 SCCP-JP-BA-A4-en-12 User Manual
8.1.2.6 Active Power Limitation via Standard Signal: WCnstNomAnIn Mode
The active power limitation is set at the input terminals for setpoint specification using an analog signal (see Sunny Central
installation manual). This is usually implemented by a ripple control signal.
The electrical current strength of the connected signal determines the nominal active power.
The analog measured values must be between 4 mA and 19 mA. If the analog signal is less than 2 mA, an error message
will be displayed in the instantaneous value P-WModFailStt (see Section 8.1.4, page 52).
The analog value is converted to a setpoint for power limitation. Here, the parameter Pmax forms the end point of the
linear characteristic curve.
8.1.3 Displaying the Status of Active Power Limitation
The instantaneous value P-WModStt indicates the status of active power limitation.
Procedure:
• Display the instantaneous value P-WModStt on the user interface (see Section 6.1, page 40).
8.1.4 Displaying Error Messages and Warnings for Active Power Limitation
The instantaneous value P-WModFailStt displays errors or warnings associated with active power limitation.
Procedure:
• Display the instantaneous value P-WModFailStt on the user interface (see Section 6.1, page 40).
Signal Power limit Description
< 2 mA Last valid value or Pmax
after restart
Signal is in the invalid range.
2 mA to 4 mA 0 kW No power is fed into the grid.
4 mA to 19 mA 0 kW to Pmax The energy fed into the grid is determined by a characteristic curve.
> 19 mA Pmax The power fed into the grid equals Pmax.
Display Description
Off No mode for active power limitation has been selected.
WMax Active power is limited by specification of an upper limit. This limit is relative to Pmax.
Hz Active power is limited by a frequency increase.
Tmp Active power is limited by temperature derating.
AmpPv Active power is limited via a DC current limitation.
AmpAC Active power is limited via an AC current limitation.
Display Cause and corrective measure
Off No mode for active power limitation has been selected.
OK A mode for active power limitation has been selected and there are no errors present.