Filter
Top Products
111
Setting of acceleration/deceleration time
and acceleration/deceleration pattern
4
PARAMETERS
(4) Setting multiple acceleration/deceleration time (RT signal, Pr.44, Pr.45, Pr. 147)
⋅ The Pr.44 and Pr.45 settings become valid when the RT signal turns ON or the output frequency reaches the
value of Pr.147 setting or higher.
⋅ When "9999" is set in Pr. 45, the deceleration time becomes equal to the acceleration time (Pr. 44).
⋅ Acceleration/deceleration time changes when the RT signal turns ON or the output frequency reaches the
Pr.147 setting or higher.
Pr.147 setting Acceleration/deceleration time Description
9999 (initial value) Pr.7, Pr.8
Acceleration/deceleration time is not
automatically changed.
0.00Hz Pr.44, Pr.45
Second acceleration/deceleration time is
applied from the start.
0.01Hz ≤ Pr.147 ≤ set frequency
Output frequency < Pr.147: Pr.7, Pr.8
Pr.147 ≤ output frequency: Pr.44, Pr.45
Acceleration/deceleration time is automatically
changed. *
Set frequency < Pr.147 Pr.7, Pr.8
Not changed as the frequency has not reached
the switchover frequency.
* Even if the output frequency is lower than the Pr.147 setting, the acceleration/deceleration time is changed to the second acceleration/
deceleration time by the RT signal.
CAUTION
⋅ When the S-pattern acceleration/deceleration A is set (refer to page 115) under V/F control and Simple magnetic flux vector
control, acceleration/deceleration time is the time to reach Pr. 3 Base frequency. When the S-pattern acceleration/
deceleration A is set under IPM motor control, acceleration/deceleration time is the time to reach the rated motor frequency
(Refer to page 81).
⋅ Acceleration/deceleration time formula when the set frequency is the base frequency or higher
⋅ The RT signal can be assigned to the input terminal using any of Pr. 178 to Pr. 189 (Input terminal function selection). Changing
the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Set
parameters after confirming the function of each terminal.
Set frequency
Pr.147 setting
Time
Output
frequency
(Hz)
Slope set
by Pr.7
Slope set
by Pr.44
Slope set
by Pr.44
(Pr.45)
Slope set
by Pr.8
Acceleration time Deceleration time
⋅ Guideline for acceleration/deceleration time when Pr. 3 Base frequency = 60Hz (0Hz to set frequency)
t =
4
×
T
× f
2
+
5
T
T: Acceleration/deceleration time setting value(s)
f : Set frequency(Hz)
9
(Pr.3)
2
9
Frequency setting (Hz)
60 120 200 400
Acceleration/
deceleration time (s)
5 5 12 27 102
15 15 35 82 305