Yaskawa Solectria Solar
DOCR-071070
Page 28 of 30
VOLT-VAR CURVE, VOLT PTS
[V%NOM]
40942-40960 (even)
uInt16
10
VOLT-VAR
CURVE,
VAR
PTS
[Q%MAX]
40943-40961 (odd)
Int16
10
4.6.2
Method 2: Constant Power Factor Configuration
The Constant Power Factor feature is meant to run permanently, if desired. When enabled, the inverters
absorb or provide an amount of reactive power instantaneously, in proportion to the real power output.
The settable Constant Power Factor range is +/-0.80. In most applications, a positive power factor will
help counteract the voltage rise at the terminals, induced by the flow of active power into the grid.
Table 4-11 Constant Power Factor Modbus Addresses
MESSAGE
MODBUS ADDRESS
DATA TYPE
SCALE FACTOR
CONST PF ENABLE/DISABLE
40304
uInt16
-
PF SET POINT [-0.80 … 0.80] 40300
Int16
100
4.6.3
Method 3: Constant Reactive Power configuration
The Constant Reactive Power feature is meant to run permanently, if desired. When enabled, the
inverters absorb or provide a constant amount of reactive power instantaneously with priority that is
independent of the flow of active power. This feature can mimic a capacitor bank or be used to control
the amount of reactive power that a bigger plant consumes.
Table 4-12 Constant VAr Modbus Addresses
MESSAGE
MODBUS ADDRESS DATA TYPE
SCALE FACTOR
CONSTANT VAR ENABLE/DISABLE
40312
uInt16
-
VAR SET POINT
40306
Int16
10
For more information on Modbus over TCP/IP messaging, contact the
Yaskawa Solectria Solar
application
engineering team.
