SAJ PDM20 series, User Manual

Page: 42 / 59

PDM20 Series
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Use inflow detection pressure to reset water shortage faults directly.
Note:When judge water shortage according to pressure , because the working
condition of each drive is different such as range of load size, only setting the
value of P0.28 reasonably according to site conditions can it make correct
judgment to water shortage.
Setting method: Run the drive. When running frequency reaches maximum
frequency, turn off inlet and record the output current displayed on the drive.
Divide this current by P1.16 (the rated current of the motor) to get a percentage.
Make the value of P0.28 a little higher than 5-10 percentage points of the
percentage. Too high value of P0.28 will lead to false water shortage report in
normal operation. Water shortage protection will not work effectively with too low
value of P0.28.
P0.34
Lower limit of
AI input signal
0.0
～
P0.35
V/mA 4.00
Used to correct lower limit of AI
signal
P0.35
Upper limit of
AI input signal P0.34 ～
20
V/mA 20.00
Used to correct upper limit of AI
signal
If you find there is some deviation between sensor feedback pressure and feedback
pressure displayed on SPD, adjust above parameter to correct the sensor.
Note: the unit of current sensor is 4~20mA; that of voltage sensor is 0~10V.
P0.36 Acceleration time
0.1
～
3600
s 5.0
P0.37 Deceleration time
0.1 ～ 3600
s 3.0
Acceleration/deceleration time setting of the pump’s motor
.
P0.38 Parameter initialization
0
～
2
0
When P0.38 is set as 1, restore factory defaults
.