Mitsubishi Electric FR-V560 Instruction Manual page 112

<Setting>
Pr. 29
Function
Setting
Linear
acceleration/
0
deceleration
(factory setting)
S-pattern
acceleration/
1 deceleration A
(torque variation
technique)
S-pattern
acceleration/
2
deceleration B
(shock absorption)
Backlash
compensation
3
acceleration/
deceleration
S-pattern
4 acceleration/
deceleration C
REMARKS
For the acceleration/deceleration time, turning on the RT signal makes Pr. 44 "second acceleration/deceleration time" and Pr.
45 "second deceleration time" valid (turning on the X9 signal makes Pr. 110 and Pr. 111 valid). Refer to page 91.
Operation selection functions 1 (Pr. 17 to Pr. 37)
Description
Acceleration/deceleration is made linearly up/down to
the preset speed .
The motor torque is utilized effectively to make fast
acceleration/deceleration in a large motor-generated
torque area and smooth acceleration/deceleration in a
small motor-generated torque area.
In this acceleration/deceleration pattern, the base
frequency is the inflection point of an S shape, and you
can set the acceleration/deceleration time according to
the reduction in motor torque in the constant-output
operation range at higher than the rated speed.
This function is valid for V/F control only. For other than
V/F control, linear acceleration/deceleration is made.
CAUTION
As the acceleration/deceleration time, set the
time taken to reach Pr. 3 "base frequency", not
Pr. 20 "acceleration/deceleration
speed".
Prevention of cargo collapse on conveyor, etc.
This setting always provides S-pattern acceleration/
deceleration from s2 (current speed) to s1 (preset
speed), easing an acceleration/deceleration shock and
producing an effect on the prevention of cargo collapse,
etc.
Backlash compensation for reduction gear, etc.
This function stops a 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 speed in accordance with the chart on the right.
The acceleration/deceleration time is increased by the
stopping time.
REMARKS
Output speed is retained for the time for the starting
speed (Pr. 13) and s1 (Pr. 140) time at a start and
accelerate again after t1 time has elapsed. Speed
reaches or below s2 (Pr. 142) is retained for
(Pr. 143) time at a start of deceleration and
decelerate again after t2 time has elapsed.
See next page.
reference
Output
speed
(r/min)
t2
103
Operation
[Linear acceleration
/deceleration]
Output
speed
(r/min)
Time
[S-pattern acceleration
/deceleration A]
Output
speed
(r/min)
Base frequency
Time
Set value 2
[S-pattern acceleration
/deceleration B]
s1
Output
speed
(r/min)
s2
Time
[Backlash compensation function]
s2
Pr.142
s1
Pr.140
Time
t1 Pr.141 t2 Pr.143
See next page.
4