Motor Controllers AC Variable Frequency Drives
RVBS
Specifications are subjected to change without notice.10/08/2021
23
➢
This function is aimed at controlling the torque during deceleration; it has no effect if there is braking
load.
Function
Code
Mod.
add.
Description
Def
Min
Max
U.M.
R/W
H06
0x0306
Deceleration Mode
0
0
1
-
R/W
H13
0x030D
Deceleration Characteristics
0
0
1
-
R/W
4.2.7
S-curve acceleration/deceleration
H04 specifies the acceleration and deceleration patterns (patterns to control output frequency).
-
Linear acceleration/deceleration mode
The inverter runs the motor with the constant acceleration and deceleration.
-
S-curve acceleration/deceleration mode
To reduce an impact that acceleration/deceleration would make on the machine (load), the inverter
gradually accelerates or decelerates the motor in both starting and ending zones of
acceleration/deceleration. Two types of S-curve acceleration/deceleration rates are available; 5%
(preset) and (H08~H11) % (user) of the maximum frequency, which are shared by the four inflection
points.
The acceleration/deceleration time command determines the duration of acceleration/ deceleration in the
linear mode; hence, the actual acceleration/deceleration time is longer than the reference
acceleration/deceleration time in the s-curve mode.
-
Acceleration/deceleration time calculation
➢
Setting of H04: 1 (preset), namely, the frequency change will be 10% or more of the maximum
frequency
➢
Acceleration or deceleration time (s) = (2 x 5/100 + 90/100+ 2 x 5/100) x (reference acceleration or
deceleration time) = 1.1 x (reference acceleration or deceleration time)
< Speed profile in s-curve acceleration/deceleration mode >
