INVT IPE300 Series - Water Supply Function

IPE300 series engineering VFD Basic operation guidelines
-108-
Take sent PZD2 as an example: PZD2 sent value = VFD internal value * P91.22/P91.23
Function
code
Name
Description
Default
P91.22
Numerator of sent PZD2
conversion base value
Actual sent
value
Sent
PZD
Denominator of sent PZD2
conversion base value
Numerator of sent PZD
conversion base value
x
=
16384
P91.23
Denominator of sent PZD2
conversion base value
16384
5.5.18 Water supply function
This function code group provides simple water supply function, which is controlled by setting
frequency or feedback pressure value.
Function
code
Name
Description
Default
P92.10
Auxiliary motor selection
0: No auxiliary motor
1: Auxiliary motor 1
2: Auxiliary motor 2
3: Auxiliary motor 1 and 2
0
P92.11
Auxiliary motor 1 start/stop
delay time
0.0–3600.0s
5.0s
P92.12
Auxiliary motor 2 start/stop
delay time
0.0–3600.0s
5.0s
P92.10–P92.12 are used to configure the simple water supply system, which accomplishes the
constant pressure water supply with one-drive-three function, i.e. one VFD driving one converter
pump and two power frequency pumps. See the following figure for its logic principle.
Inverter motor
output frequency
Equal to
frequency upper
limit?
Start of auxiliary
motor start delay
timer
Yes
Start delay time is
up?
Start the auxiliary
motors 1 and 2 in
turn
Equal to
frequency lower
limit?
No
Yes
Start of auxiliary
motor stop delay
timer
Stop delay time is
up?
Yes
Yes
End
No
No
No
Stop the auxiliary
motors 1 and 2 in
turn