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Acceleration/deceleration Pattern (pr. 29, Pr. 140 To Pr. 143) - Mitsubishi Electric FR-A500 Instruction Manual

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

Pr. 29 "acceleration/deceleration pattern"
Pr. 140 "backlash acceleration stopping frequency"
Pr. 141 "backlash acceleration stopping time"
Pr. 142 "backlash deceleration stopping frequency"
Pr. 143 "backlash deceleration stopping time"
Set the acceleration/deceleration pattern.
Also, you can suspend acceleration/deceleration at set frequencies and for the time period set in the parameters.
Parameter
Factory
Number
Setting
29
140
1.00Hz
141
142
1.00Hz
143
Set value 0
[Linear acceleration/deceleration]
Time
<Setting>
Pr. 29
Function
Setting
Linear
0
acceleration/
deceleration
S-shaped
acceleration/
1
deceleration A
(Note 1)
S-shaped
2
acceleration/
deceleration B
Backlash
3
compensation
(Note 2, 3)
Note: 1. For the acceleration/deceleration time, set the time required to reach the "base frequency" in Pr. 3,
not the "acceleration/deceleration reference frequency" in Pr. 20. For details, refer to Pr. 7 and Pr. 8.
2. Pr. 140 to Pr. 143 is accessible when "3" is set in Pr. 29.
3. The acceleration/deceleration time is increased by the stopping time.
Setting Range
0
0, 1, 2, 3
0 to 400Hz
0.5 s
0 to 360 s
0 to 400Hz
0.5 s
0 to 360 s
Set value 1
[S-shaped acceleration/deceleration A]
fb
Time
Linear acceleration/deceleration is made up/down to the preset frequency (factory setting).
For machine tool spindles
This setting is used when it is necessary to make acceleration/deceleration in a short time up to the
60Hz <50Hz> or higher speed range. In this acceleration/deceleration pattern, fb (base frequency) is
always the inflection point of an S shape, and you can set the acceleration/deceleration time according
to the reduction in motor torque in the 60Hz <50Hz> or higher constant-output operation range.
Prevention of cargo collapse on conveyor, etc.
This setting provides S-shaped acceleration/deceleration from f2 (current frequency) to f1 (target
frequency), easing an acceleration/deceleration shock. This pattern has an effect on the prevention of
cargo collapse, etc.
Backlash compensation for reduction gear, etc.
This function stops the speed change temporarily during acceleration/deceleration, reducing a shock
generated when a reduction gear backlash is eliminated suddenly. Use Pr. 140 to Pr. 143 to set the
stopping times and stopping frequencies in accordance with the above diagrams.
Remarks
3: Backlash compensation
Valid when Pr. 29 = 3.
Valid when Pr. 29 = 3.
Valid when Pr. 29 = 3.
Valid when Pr. 29 = 3.
Set value 2
[S-shaped acceleration/deceleration B]
f1
f2
Time
Description
84
PARAMETERS
Related parameters
Pr. 3 "base frequency"
Pr. 7 "acceleration time"
Pr. 8 "deceleration time"
Pr. 20 "acceleration/deceleration
reference frequency"
Pr. 44 "second acceleration/
deceleration time"
Pr. 45 "second deceleration time"
Pr. 110 "third acceleration/
deceleration time"
Pr. 111 "third deceleration time"
Set value 3
[Backlash compensation function]
f1
Pr.140
t1
Pr.141
t2
f2
Pr.142
Time
Pr.143

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