Chapter 5 Function parameter
83
Ch
ap
ter 5
Set frequency (f)
Time(t)
Output
frequency(Hz)
t
1
t
2
t
1
t
2
Figure 5-10:
Schematic diagram of S curve ac/deceleration A
Set frequency (f)
Time(t)
Output frequency(Hz)
T
Rated frequency (fb)
T
Figure 5-11:
Schematic diagram of S curve ac/deceleration B
The function code F3.14 and F3.15 respectively defined the proportion of start-section and
the proportion of end-section for S curve acceleration and deceleration A, the two function code
must meet: F3.14 + F3.15 ≤ 100.0%.
In the Figure of the S-curve acceleration and deceleration A, t1 is the time parameter defined
by F3.14, the slope of the output frequency variation during this period is gradually increasing. t2
is the time parameter defined by F3.15, the slope of the output frequency variation during the
period is gradually changed to 0. Within the time between t1 and t2, the slope of the output
frequency variation is fixed, i.e. the linear acceleration and deceleration is achieved in this interval.
5-2-6.
V/F control parameters: F4.00-F4.14
This group of function code is only valid to V/F control, invalid to vector control.
V/F control is suitable for fans, pumps and other universal loads, or one inverter control multiple
motors, or for the applications that inverter power is significantly different from the motor power.
Code
Parameter name
Setting range
Factory
setting
Change
Limit
F4.00 V/F curve setting
Linear V/F
0
0
★
Multi-point V/F
1
Square V/F
2
1.2th power V/F
3
1.4th power V/F
4
1.6th power V/F
6
1.8th power V/F
8
Reserve
9
V/F completely separate
10
V/F half separate
11
0: linear V/F,Suitable for ordinary constant torque load.
1: multi-point V/F,Suitable for dehydrator, centrifuge and other special loads any V/F
relationship curves can be obtained by setting parameters F4.03 to F4.08.
2: square V/F,Suitable for fans, pumps and centrifugal loads.
