User Manual of A90 Series Inverter
168
during start/stop or cannot directly run once enabled by switching the start/stop mode. It is
necessary to first disconnect the running terminal and then close it to start running.
Function
code
Function code name
Parameter description
Unit
Default
setting
Attribute
F04.29
Zero speed check
frequency
0.00 - 5.00
Hz
0.25
●
When the output frequency is lower than the zero speed judgment frequency, the
terminal “zero-speed running” will be valid.
Function
code
Function code name
Parameter description
Unit
Default
setting
Attribute
F04.30
Initial position search
after power-on or fault
0: Invalid
1: valid
1
●
When the synchronous motor is used (e.g. F01.00=2) and subjected to VF control, the
initial angle is essential for the control performance. In particular, reversing may occur at
the moment of start. Thus, the initial position is searched by default after power-on or
failure, in order to achieve a better control performance.
7.6
VF Control Parameter Group of F05 Group
The function codes in this group are valid for V/F control and invalid for vector
control.
V/F control is suitable for general-purpose loads such as fans and pumps, or when
multiple motors are driven by one inverter or the power of the inverter is quite different
from that of the motor.
Function
code
Function code
name
Parameter description
Unit
Default
setting
Attribute
F05.00
V/F curve
setting
0: straight line V/F
1: multi-point broken line V/F
2: 1.3-power V/F
3: 1.7-power V/F
4: square V/F
5: VF complete separation mode (Ud
= 0, Uq = K * t = voltage of
separation voltage source)
6: VF semi-separation mode (Ud = 0,
Uq = K * t = F/Fe * 2 * voltage of
separation voltage source)
0
○
