9.2 Details of Function Codes
9-93
Chap. 9 FUNCTION CODES
H07 Acceleration/Deceleration Pattern
Data for H07 Accl./Decel. pattern
0 Linear (Default)
1 S-curve (Weak)
2 S-curve (Strong)
H07 specifies the acceleration and deceleration
patterns (patterns to control output frequency).
3 Curvilinear
Linear acceleration/deceleration
The inverter runs the motor with the constant acceleration and deceleration.
S-curve acceleration/deceleration
To reduce an impact that acceleration/deceleration would make on the machinery (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% (weak) and 10% (strong) 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 period; hence, the actual acceleration/deceleration time is longer
than the reference acceleration/deceleration time.
Acceleration/deceleration time
<S-curve acceleration/deceleration (weak): when the frequency change is 10% or more of the
maximum frequency>
Acceleration or deceleration time (s) = (2 × 5/100 + 90/100+ 2 × 5/100) × (reference
acceleration or deceleration time)
= 1.1 × (reference acceleration or deceleration time)
<S-curve acceleration/deceleration (strong): when the frequency change is 20% or more of
the maximum frequency>
Acceleration or deceleration time (s) = (2 × 10/100 + 80/100+ 2 × 10/100) × (reference
acceleration or deceleration time)
= 1.2 × (reference acceleration or deceleration time)
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