Fuji Electric FRENIC-MEGA, Instruction Manual

Page: 166 / 358

5-47
„ Acceleration/Deceleration pattern (H07)
H07 specifies the acceleration and deceleration patterns (patterns to control output frequency).
Data for
H07
Acceleration/
deceleration
pattern
Motion
Function
code
0
Linear The inverter runs the motor with the constant acceleration and
deceleration.
－
1
S-curve
(Weak)
To reduce an impact that
acceleration/deceleration would
make on the machine, the
inverter gradually accelerates or
decelerates the motor in both the
starting and ending zones of
acceleration or deceleration.
Weak:
The acceleration/deceleration rate
to be applied to all of the four
inflection zones is fixed at 5% of
the maximum frequency.
－
2
S-curve
(Arbitrary)
Arbitrary:
The acceleration/deceleration rate
can be arbitrarily specified for
each of the four inflection zones.
H57
H58
H59
H60
3
Curvilinear Acceleration/deceleration is linear below the base frequency (constant
torque) but it slows down above the base frequency to maintain a
certain level of load factor (constant output).
This acceleration/deceleration pattern allows the motor to accelerate or
decelerate with the maximum performance of the motor.
－
S-curve acceleration/deceleration
To reduce an impact that acceleration/deceleration would make on the machine, the inverter gradually accelerates or
decelerates the motor in both the starting and ending zones of acceleration or deceleration. Two types of S-curve
acceleration/deceleration rates are available; applying 5% (weak) of the maximum frequency to all of the four inflection
zones, and specifying arbitrary rate for each of the four zones with function codes H57 to H60. The reference
acceleration/deceleration time 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
Starting zone Ending zone Starting zone Ending zone
S-curve (Weak) 5% 5% 5% 5%
S-curve (Arbitrary)
Setting range: 0 to 100% H57
Acceleration rate
for the 1st S-curve
(Leading edge)
H58
Acceleration rate
for the 2nd S-curve
(Trailing edge)
H59
Deceleration rate
for the 1st S-curve
(Leading edge)
H60
Deceleration rate
for the 2nd S-curve
(Trailing edge)
<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 (arbitrary): when the frequency change is 30% or more of the maximum frequency--10%
at the leading edge and 20% at the trailing edge>
Acceleration or deceleration time (s) = (2
×
10/100 + 70/100 + 2
×
20/100)
×
(reference acceleration or deceleration time)
= 1.3
×
(reference acceleration or deceleration time)