INVT Goodrive270 Series User Manual

Goodrive270 series VFD for fan and pump Basic operation guidelines
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Function
code
Name
Description
Default
Modify
variable-frequency
motor adding
P94.23
Variable-frequency
motor DEC time for
power-frequency
motor adding
0.0–300.0s
10.0s
○
P94.24
Pressure tolerance
for motor reducing
0.0–30.0% (relative to PID1 max. value)
4.0%
○
P94.25
Running frequency
for motor reducing
P00.05–P94.20 (Running frequency for
motor adding)
5.00Hz
○
P94.26
Motor reducing delay
0.0–3600.0s
10.0s
○
P94.27
Variable-frequency
motor action for
motor reducing
0: Keep the frequency unchanged
1: Accelerate to the motor running
frequency
1
○
P94.28
Variable-frequency
motor ACC time for
motor reducing
0.0–300.0s
10.0s
○
5.5.16.2 Polling function
Automatic polling
The VFD supports the automatic water pump polling function to achieve two goals: First, to keep the
run time of each pump the same to balance the loss; Second, to prevent any pump from stopping for
too long, which could lead to blocking.
When the initial motor running time exceeds P94.34 (Variable-frequency motor polling cycle) and the
present frequency is higher than P94.35 (Polling running frequency threshold), the VFD starts
automatic polling. It changes the objects of variable-frequency control objects by adding and reducing
motors and then re-calculates the polling time.
Note: Polling time recalculation is also triggered by motor adding or reducing that occurs during
normal PID adjustment.
Related parameter list:
Function
code
Name
Description
Default
Modify
P94.34
Motor polling cycle
0.0–6000.0h
Automatic polling is targeted at idle
variable-frequency motors. The value 0
indicates no polling.
0.0h
○

INVT Goodrive270 Series Specifications

General

Brand	INVT
Model	Goodrive270 Series
Category	Water Pump
Language	English