Second Acceleration And Deceleration Functions - Hitachi WJ200 Series Instruction Manual

Second Acceleration and Deceleration Functions

The WJ200 inverter features two-stage acceleration and deceleration ramps. This gives
flexibility in the profile shape. You can specify the frequency transition point, the point
at which the standard acceleration (F002) or deceleration (F003) changes to the second
acceleration (a092) or deceleration (a093). Or, you can use intelligent input [2CH] to
trigger this transition. These profile options are also available for the second motor
settings. Select a transition method via a094 as depicted below. Be careful not to confuse
second acceleration/deceleration settings
the
a094 00
=
Output
frequency
Accel 1
0
2CH 1
input
0
Func.
Name
Code
Acceleration time (2)
A092
Acceleration time (2),
A292
2 motor
nd
Deceleration time (2)
A093
Deceleration time (2),
A293
2 motor
nd
Select method to switch to
A094
Acc2/Dec2 profile
Select method to switch to
A294
Acc2/Dec2 profile, 2
Acc1 to Acc2 frequency
A095
transition point
Acc1 to Acc2 frequency
A295
transition point, 2
Dec1 to Dec2 frequency
A096
transition point
Dec1 to Dec2 frequency
A296
transition point, 2
NOTE: For A095 and A096 (and for 2nd motor settings), if you set a very rapid Acc1 or
Dec1 time (less than 1.0 second), the inverter may not be able to change rates to Acc2 or
Dec2 before reaching the target frequency. In that case, the inverter decreases the rate
of Acc1 or Dec1 in order to achieve the second ramp to the target frequency.
Transition via 2CH input
Accel 2
"A" Function
Duration of 2
acceleration, range is:
0.01 to 3600 sec.
Duration of 2
deceleration, range is:
0.01 to 3600 sec.
Three options for switching
from 1st to 2nd accel/decel:
00 ...2CH input from terminal
01 ...Transition frequency
02 ...Forward and reverse
motor
nd
Output frequency at which
Accel1 switches to Accel2,
range is 0.0 to 400.0 Hz
motor
nd
Output frequency at which
Decel1 switches to Decel2,
range is 0.0 to 400.0 Hz
motor
nd
with settings for the
a094 01
=
Output
frequency
a095
t
0
t
Description
nd segment of
segment of
nd
second motor
!
Transition via freq. level
Accel 2
Frequency
transition point
Accel 1
Defaults
Run
Mode
Lnitial data Units
Edit
10.00 sec
10.00 sec
10.00 sec
10.00 sec
00
00
0.0 Hz
0.0 Hz
0.0 Hz
0.0 Hz
3−37
t
−
−