ABB ACQ80, Firmware Manual

Page: 44 / 390

44 Program features
(
40.96
) is used as the speed limit instead of the defined maximum pump speed
(
79.52
).
Settings
Parameter group
79 Solar pump control
(page
226
) and
40 Process PID set 1
(page
190
).

Solar pump control
The solar pump control feature can be used to select one of five operation
modes of the solar pump drive-in parameter.
The drive
• starts when the actual DC bus voltage is equal to or greater than PV cell
minimum voltage (
79.42
)
• stops when the actual DC bus voltage is less than PV cell minimum voltage
(
79.42
).
The maximum voltage at which the drive trips (
D4B1 PV max volt
) can be defined
with parameter
79.43 PV cell max voltage
. The voltage at which the water motor
pump starts or stops is defined with parameter
79.41 Start DC voltage
.
The pump
• starts when the actual DC bus voltage is equal to or greater than the voltage
defined in the Start DC voltage (
79.41
)
• stops when the actual DC bus voltage is less than Start DC voltage (
79.41
).
To make sure that drive is ready and has sufficient DC voltage to start running
the pump motor, the value of parameter
79.41 Start DC voltage
value should be
equal or higher than
79.42 PV cell min voltage
.
Note: The drive must be kept in external mode for the below modes. MPPT
control program functions only in external mode.
PID enabled
MPPT speed limit
Pump maximum speed
( 79.52 )
Process PID output %
( 40.96 )
100% = Pump maximum
speed ( 79.52 )