C2: s-curve characteristics – Yaskawa AC Drive Z1000 AC Drive HVAC Fan User Manual
Page 52
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
Figure 1.20 Accel/Decel Time Switching Frequency
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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.
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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.
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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 ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual