C: Tuning - YASKAWA Z1000U Technical Manual

5.3

C: Tuning

C parameters set the characteristics for acceleration, deceleration, and S-curves. Other parameters in the C group cover settings
for slip compensation, torque compensation, and carrier frequency.
u
C1: Acceleration and Deceleration Times
n C1-01 and C1-02: Accel, Decel Time 1
Four different sets of acceleration and deceleration times can be set in the drive by digital inputs, motor selection, or switched
automatically.
Acceleration time parameters always set the time to accelerate from 0 Hz to the maximum output frequency (E1-04).
Deceleration time parameters always set the time to decelerate from maximum output frequency to 0 Hz. C1-01 and C1-02
are the default active accel/decel settings.
No.
C1-01
C1-02
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.
C1-09
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.
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.
C2-01
C2-02
Figure 5.14 illustrates S-curve application.
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
Parameter Name
Acceleration Time 1
Deceleration Time 1
Parameter Name
Fast Stop Time
Parameter Name
S-Curve Characteristic at Accel Start
S-Curve Characteristic at Accel End
5.3 C: Tuning
Setting Range
0.1 to 6000.0 s
Setting Range
0.1 to 6000.0 s
Setting Range
0.00 to 10.00 s
Default
30.0 s
Default
10.0 s
5
Default
0.20 s
0.20 s
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