238
PARAMETER
2.5.4
S-pattern acceleration/deceleration and backlash measures
[Pr. 29, 140 to 143*, 380 to 383
*
, 516 to 519
*
]
(common)
(1) S-pattern acceleration/deceleration [
Pr. 29,
380 to 383, 516 to 519
]
Generally, frequency/time gradient of acceleration/
deceleration is a constant linear acceleration/
deceleration [
Pr. 29
= 0 (initial value)]. This
acceleration/deceleration gradient can be changed
into S-pattern.
When the acceleration/deceleration time ([
Pr. 7, 8
]
setting, etc.) setting under Real sensorless vector
control or vector control is 0s, the S-pattern
acceleration/deceleration A to D ([
Pr. 29
=
1, 2, 4, 5
]) is
linear acceleration/deceleration.
Set linear acceleration/deceleration ([
Pr. 29
= 0 (initial
value)]) when torque control is exercised under Real
sensorless vector control or vector control. When
acceleration/deceleration patterns other than the
linear acceleration/deceleration are selected, the
protective function of the inverter may function.
1) S-pattern acceleration/deceleration A [
Pr. 29 = 1
]
In S-pattern acceleration/deceleration pattern,
acceleration is maximum around [
Pr. 3 Base
frequency
] (fb) as follows. Therefore using motor
torque effectively, acceleration is fast for larger
motor torque range, and slow for smaller motor
torque range.
Effective for shortening the time taken to reach
constant-power range where motor torque is
small, when comparing with linear acceleration/
deceleration pattern. (Example: for machine tool)
As for the acceleration/deceleration time settings
([
Pr. 7, 8, 16, 44, 45, 110, 111
]) for S-pattern
acceleration/deceleration A, set the time taken
until [
Pr.3 Base frequency
] is reached, not [
Pr. 20
Acceleration/deceleration reference frequency
]. Refer
to the following expression when set frequency is
[
Pr. 3 Base frequency
] or more.
common
(*[
Pr. 380 to 383, 516 to 519
] are not available for
.)
(*[
Pr. 140 to 143, 380 to 383, 516 to 519
] are not available for
.)
F700
E700
D700
[
Pr.
]
Name
Initial
Value
Setting
Range
Description
Available Inverters
29
Acceleration/deceleration pattern
selection
0
0
Linear acceleration/ deceleration
{
{
{
1
S-pattern Acceleration/Deceleration A
2
S-pattern Acceleration/Deceleration B
3
Backlash measures
-—
4
S-pattern Acceleration/Deceleration C
-—
5
S-pattern Acceleration/Deceleration D
140 Backlash acceleration stopping frequency
1Hz
0 to 400Hz
Set the stopping frequency and time for backlash
measures.
Valid when [
Pr. 29
=
3
]
{
{
—
141 Backlash acceleration stopping time
0.5s
0 to 360s
142 Backlash deceleration stopping frequency
1Hz
0 to 400Hz
143 Backlash deceleration stopping time
0.5s
0 to 360s
380 Acceleration S-pattern 1
0
0 to 50% Valid when S-pattern acceleration/deceleration C
[
Pr. 29
=
4
] is set.
Set the time taken for S-pattern from starting of
acceleration/deceleration to linear acceleration
as % to the acceleration/deceleration time ([
Pr.7,
8
], etc.).
An acceleration/deceleration pattern can be
changed with the X20 signal.
{
—
—
381 Deceleration S-pattern 1
0
0 to 50%
382 Acceleration S-pattern 2
0
0 to 50%
383 Deceleration S-pattern 2
0
0 to 50%
516 S-pattern time at a start of acceleration
0.1s
0.1 to 2.5s Valid when S-pattern acceleration/deceleration D
[
Pr. 29
=
5
] is set.
Set the time taken for S-pattern acceleration/
deceleration (S-pattern operation).
{
—
—
517 S-pattern time at a completion of acceleration
0.1s
0.1 to 2.5s
518 S-pattern time at a start of deceleration
0.1s
0.1 to 2.5s
519 S-pattern time at a completion of deceleration
0.1s
0.1 to 2.5s
A700
F700
E700
D700
common
S-pattern acceleration/deceleration A
T: Acceleration/deceleration time setting (s)
f: Set frequency (Hz)
Guideline for acceleration/deceleration time (0Hz
to set frequency) at [
Pr. 3 Base frequency
= 60Hz]
Setting Value of
Acceleration/
Deceleration time (s)
Set frequency (Hz)
60
120
200
400
5
5
12
27
102
15
15
35
82
305
Linear ramp
S-pattern A
Accel/decel
time setting
fmax
f b
Output frequency (Hz)
Time
t =
9
([
Pr. 3
])
+
4
T
2
f
2
9
5
T
Summary of Contents for FR-A700 Series
Page 245: ...279 2 PARAMETER PARAMETER MEMO ...
Page 440: ...474 PARAMETER MEMO ...
Page 522: ...556 SELECTION MEMO ...
