Output Frequency
C1-11
Accel/Decel Time
Switch Frequency
C1-03
setting
When the output frequency C1-11, drive uses Accel/Decel Time 1 (C1-01, -02)
When the output frequency < C1-11, drive uses Accel/Decel Time 2 (C1-03, -04)
C1-01
setting
C1-02
setting
C1-04
setting
C1-03 =
(accel time from 0 Hz to C1-11)
×
(E1-04)
C1-11
C1-01 =
(accel time between C1-11 and E1-04)
×
(E1-04)
(E1-04 - C1-11)
C1-02 =
(decel time between E1-04 and C1-11)
×
(E1-04)
(E1-04 - C1-11)
C1-04 =
(decel time from C1-11 to 0 Hz)
×
(E1-04)
C1-11
Figure 1.20 Accel/Decel Time Switching Frequency
n
C1-11: Accel/Decel Time Switching Frequency
Sets the frequency at which the drive switches between accel/decel time settings.
Refer to Switching Accel/Decel Times by
for details.
No.
Parameter Name
Setting Range
Default
C1-11
Accel/Decel Time Switching Frequency
0.0 to 240.0 Hz
0.0 Hz
Note:
Setting C1-11 to 0.0 disables this function.
n
C1-09: Fast Stop Time
Sets a special deceleration used when a select group of faults occur or when closing a digital input configured as H1-
oo
=
15 (N.O. input) or 17 (N.C. input). A momentary closure of the digital input will trigger the Fast Stop operation; it does not
have to be closed continuously.
The drive cannot be restarted after initiating a Fast Stop operation until after completing deceleration, clearing the Fast Stop
input, and cycling the Run command.
A digital output programmed for “During Fast Stop” (H2-
oo
= 4C) will be closed as long as Fast Stop is active.
No.
Parameter Name
Setting Range
Default
C1-09
Fast Stop Time
0.1 to 6000.0 s
10.0 s
NOTICE: Rapid deceleration can trigger an overvoltage fault. The drive output shuts off when faulted and the motor coasts. Set an
appropriate Fast Stop time to C1-09 to avoid this uncontrolled motor state and to ensure that the motor stops quickly and safely.
u
C2: S-Curve Characteristics
Use S-curve characteristics to smooth acceleration and deceleration and minimize abrupt shock to the load. Set S-curve
characteristic time during acceleration/deceleration at start and acceleration/deceleration at stop. Increase the value set to
C2-01 if the STo fault (Step Out Detection) occurs when starting a PM motor.
n
C2-01 and C2-02: S-Curve Characteristics
C2-01 and C2-02 set separate S-curves for each section of the acceleration or deceleration.
No.
Parameter Name
Setting Range
Default
C2-01
S-Curve Characteristic at Accel Start
0.00 to 10.00 s
Determined by
A1-02
C2-02
S-Curve Characteristic at Accel End
0.20 s
illustrates S-curve application.
1.3 C: Tuning
52
YASKAWA SIEP YAIZ1U 03B YASKAWA AC Drive – Z1000 Programming Manual
