Method 2: Constant Power Factor Configuration; Method 3: Constant Reactive Power Configuration - YASKAWA ACS-500 User Manual

VOLT-VAR CURVE,
[V%NOM]
VOLT-VAR CURVE,
[Q%MAX]
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
CONST PF ENABLE/DISABLE
PF SET POINT [-0.80 ... 0.80]
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
CONSTANT VAR ENABLE/DISABLE
VAR SET POINT
For more information on Modbus over TCP/IP messaging, contact the
engineering team.
Yaskawa Solectria Solar
VOLT PTS
40942-40960 (even)
VAR PTS
40943-40961 (odd)
MODBUS ADDRESS
40304
40300
MODBUS ADDRESS DATA TYPE
40312
40306
uInt16
Int16
DATA TYPE
uInt16
Int16
uInt16
Int16
Yaskawa Solectria Solar
DOCR-071070
10
10
SCALE FACTOR
-
100
SCALE FACTOR
-
10
application
Page 28 of 30