Hitachi WJ Series

Chapter 9 Inverter Functions
9-3-3
9.3.2 Switching the Acceleration/Deceleration Time in Two Stages
 How to change the motor acceleration/deceleration time using an external I/O input signal?
 Since high torque is required to start the motor, how to accelerate slowly at low speed and then
have higher acceleration at speed above a certain level?
 How to accelerate/decelerate the motor quickly for forward rotation, but slowly for reverse
rotation?
 The two-stage acceleration/deceleration function can be used to switch the acceleration/
deceleration time during operation according to the "Accel/Decel change trigger selection
[A094]*
1
" setting.
 To perform switching using an input terminal, assign "2-stage Acceleration/Deceleration [2CH]"
to any one of input terminal function.
Code
Item
Description
Data
[F002]
*1
Acceleration time 1
setting or monitor
Sets acceleration time.
0.00 to
3600.00 (s)
[F003]
*1
Deceleration time 1
setting or monitor
Sets deceleration time.
[A092]
*1
Acceleration time 2
Sets acceleration time 2.
[A093]
*1
Deceleration time 2
Sets deceleration time 2.
[A094]
*1
Accel/Decel change
trigger selection
Switches the acceleration/deceleration time according to
the [2CH] input terminal.
00
The acceleration/deceleration time is switched according
to the frequency set in [A095]
*1
/[A096]
*1
.
01
When the rotation direction command is switched during
operation, the acceleration/deceleration time is also switched.
02
[A095]
*1
Accel1 to Accel2
frequency transition point
Sets the frequency at which to switch when accelerating
and [A094]
*1
is set to "01".
0.00 to
590.00 (Hz)
[A096]
*1
Decel1 to Decel2
frequency transition point
Sets the frequency at which to switch when decelerating
and [A094]
*1
is set to "01".
[C001]
to
[C007]
Input terminal function
2-stage acceleration/deceleration [2CH]:
When [A094]
*1
is set to "00", the acceleration/ deceleration
time can be switched by turning this signal on and off.
09
*1. "2nd-motor control [SET]" target parameter. The second control parameter is also subject to setting.
■ When acceleration/deceleration time is switched by the [2CH] input terminal
■ When acceleration/deceleration time is switched by the set frequency
■ When acceleration/deceleration time is switched by the rotation direction command
Output
frequency
[2CH]
[FW]
Acceleration
time 1
Deceleration
time 1
Deceleration
time 2
Acceleration
time 2
ON
ON
Output
frequency
[FW]
[A096]
[A095]
Acceleration
time 1
Deceleration
time 1
Deceleration
time 2
Acceleration
time 2
ON
FW
RV
Forward rotation side
output frequency
Acceleration
time 1
Deceleration
time 2
Acceleration
time 2
Deceleration
time 1
Reverse rotation side
output frequency
ON
ON
A
Q