Acceleration/Deceleration Pattern (Pr.29, Pr.140 To Pr.143) - Mitsubishi Electric FR-F720P-0.75K to 110K Instruction Manual

Fr-f700p series
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4.8.4

Acceleration/deceleration pattern (Pr.29, Pr.140 to Pr.143)

You can set the acceleration/deceleration pattern suitable for application.
You can also set the backlash measures that stop acceleration/deceleration once at the parameter-set
frequency and time during acceleration/deceleration.
Parameter
Number
Acceleration/deceleration pattern
29
selection
140
Backlash acceleration stopping frequency
141
Backlash acceleration stopping time
142
Backlash deceleration stopping frequency
143
Backlash deceleration stopping time
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 201)
Setting value "0"
[Linear acceleration
/ deceleration]
Time
Setting value "1"
[S-pattern acceleration
/deceleration A]
fb
Time
CAUTION
⋅ For the acceleration/deceleration time of the S-pattern acceleration/deceleration A, set the time to reach Pr.3 Base frequency
(rated IPM motor frequency under IPM motor control (refer to page 81)) but not the time to reach Pr.20 Acceleration/
deceleration reference frequency.
Initial
Name
Value
(1) Linear acceleration/ deceleration (Pr. 29 = "0", initial value)
⋅ When the frequency is changed for acceleration, deceleration, etc. in inverter
operation, the output frequency is changed linearly (linear acceleration/
deceleration) to reach the set frequency without straining the motor and
inverter. Linear acceleration/deceleration has a uniform frequency/time slope.
(2) S-pattern acceleration/deceleration A (Pr. 29 = "1")
⋅ For machine tool spindle applications, etc.
Used when acceleration/deceleration must be made in a short time to a high-
speed range of not lower than the base frequency. In this acceleration/
deceleration pattern, Pr. 3 Base frequency* (fb) is the inflection point of the S
pattern and you can set the acceleration/deceleration time appropriate for motor
torque reduction in a constant-power operation range of base frequency (fb) or
higher.
* Rated motor frequency under IPM motor control (refer to page 81).
Setting of acceleration/deceleration time
and acceleration/deceleration pattern
Setting
Range
0
Linear acceleration/ deceleration
1
S-pattern acceleration/deceleration A
0
2
S-pattern acceleration/deceleration B
3
Backlash measures
6
Variable-torque acceleration/deceleration
1Hz
0 to 400Hz
Set the stopping frequency and time for
0.5s
0 to 360s
backlash measures.
1Hz
0 to 400Hz
Valid when Pr. 29 = 3
0.5s
0 to 360s
Description
115
4

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