STEP ET Series - Page 102

Chapter 7 Parameter Explanation
Shanghai Sigriner STEP Electric Co., Ltd.
- 92 -
Function code
Name
Setting range
Factory setting
P14.09
V/F voltage V4 (V)
1~460
380
P14.10
V/F frequency F4 (Hz)
0.00~300.00
50.00
The P14.00 parameter is used to determine the different V/F curves in the voltage vector V/F control
running mode (P10.00 = 0).
a) V/F curve
b) Multi-segment V/F curve
Figure 7-13 Schematic Diagram of VF Curve
P14.00 = 0 is applicable to the constant torque load case; there is a linear relationship between V and
F with a coefficient of 1. See the straight line in the figure for details.
P14.00 = 4 user-defined curve, which is suitable for segmented constant torque load. See the above
figure.
In Figure 7−13 b): F0<F1<F2<F3<F4≤f
b
f
b
is the basic running frequency P40.01
V0≤V1≤V2≤V3<V4≤Vmax V0, V1, V2, V3 and V4 refer to the actual output voltage relative to
the maximum output voltage and rated frequency (V1= (Vmax/ f
b
)* For F1, Vmax=380V, f
b
=50Hz).
P14.00 = 1 - 3, which is suitable for loads with variable torque, such as fan and pump. P14.00 is set
to 1 - 3, corresponding to curves of 1.2 power, 1.5 power and 2 power, respectively. See Figure
7-13a. The 2-power curve is applicable to water supply, and the 1.2 power and 1.5 power curves are
applicable to liquid load of other media. The curves can be selected according to the actual situation.
Function code
Name
Setting range
Factory setting
P14.12
ACS voltage setting
380
0~690
P14.13
ACS frequency setting
50.0
0.0~3000.0
P14.14
Special power type
0
0~3
When P10.00 is set to 6 voltage and current source control mode and P14.14 setting to 0 can achieve
VF separation mode. At this time, inverter’s three phase output connects to three phase LC, and can
be used as three phase power sources. P14.12 setting output voltage amplitude, and P14.13 setting
output frequency.
P14.14 setting to 1 is for the current source mode. This mode is constant current control mode. By
setting P20.02’s current, P14.13 can set frequency, which can be applied to power supplying
scenarios including inductive load or resistive load.
P14.14 setting to 2 is for the fire pump application. This mode is mainly applied to fire pump patrol
inspection. The motor is normally asynchronous motor. During each patrol inspection, let the motor
run with no load for some time to ensure it functions normally.
P14.14 setting to 3 is for fan patrol inspection application. This mode is mainly applied to fan patrol