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5-57
Acceleration
cy change is 20% or more of
the max
uency>
Acce
elerat
0/10
rati
time)
(referen
or dece
/deceleration
/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 frequen
imum freq
leration or dec
ion time (s): (2
×
10/100 + 80/100 + 2
×
1
0)
×
(reference
accele
on or deceleration
= 1.2
×
ce acceleration
leration time)
Curvilinear acceleration
Acceleration/deceleration is linear b
w the ba
ant torque) bu t slows
wn above the base frequency to maintain a certain level of load factor (constant output).
attern allows the motor to accelerate or decelerate with the
elo
se frequency (const
t i
do
This acceleration/deceleration p
maximum performance of the motor.
Choose an appropriate acceleration/deceleration time, taking into account the
machinery’s load torque.
H09, H49
Starting Mode (Auto search and Delay time)
H
s
art of the inverter after a momentary power failure and
ery normal startup.
an be switched by assigning an
STM
terminal command ("Enable
09 specifies the auto search mode for idling motor speed to run the idling motor without
topping it.
T
e
he auto search applies to both a rest
v
The auto search mode c
auto search for idling motor speed at starting") to a digital input terminal with any of E01 to E05
(function code data = 26). If no
STM
is assigned, the inverter interprets
STM
as being OFF by
default.
Auto search for idling motor speed
Starting the inverter (with a run command ON,
BX
OFF, auto-reset, etc.) with
STM
being ON
searches for the idling motor speed for a maximum of 1.2 seconds to run the idling motor
without stopping it. After completion of the auto search, the inverter accelerates the motor up
to the reference frequency according to the frequency command and the preset acceleration
time.
Auto search for idling motor speed to follow