C2: S-Curve Characteristics - YASKAWA P1000 Technical Manual

5.3 C: Tuning
n C1-09: Fast Stop Time
Sets a special deceleration used when a select group of faults occur (e.g., L8-03 Overheat Pre-Alarm Operation Selection) 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
<1> The setting range for the acceleration and deceleration times is determined by the accel/decel time setting units in C1-10. For example, if the time
is set in units of 0.01 s (C1-10 = 0), the setting range becomes 0.00 to 600.00 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.
n C1-10: Accel/Decel Time Setting Units
Determines the units for the acceleration and deceleration times set to C1-01 through C1-09 using parameter C1-10.
No.
C1-10
Setting 0: 0.01 s units
The accel/decel times are set in 0.01 s units. The setting range is 0.00 to 600.00 s. C1-10 cannot be set to 0 if any of the
parameters C1-01 to C1-09 is set to 600.1 s or longer.
Setting 1: 0.1 s units
The accel/decel times are set in 0.1 s units. The setting range is 0.0 to 6000.0 s.
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 to C2-04: S-Curve Characteristics
C2-01 through C2-04 set separate S-curves for each section of the acceleration or deceleration.
No.
C2-01
C2-02
C2-03
C2-04
Figure 5.23 illustrates S-curve application.
Setting the S-curve will increase the acceleration and deceleration times.
• Actual accel time = accel time setting + (C2-01 + C2-02) / 2
• Actual decel time = decel time setting + (C2-03 + C2-04) / 2
178
Parameter Name
Fast Stop Time
Parameter Name
Accel/Decel Time Setting Units
Parameter Name
S-Curve Characteristic at Accel Start
S-Curve Characteristic at Accel End
S-Curve Characteristic at Decel Start
S-Curve Characteristic at Decel End
FWD run
REV run
C2-02
Output
frequency
C2-01
Figure 5.23 S-Curve Timing Diagram - FWD/REV Operation
C2-04
C2-03
C2-01
C2-03
C2-02
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Setting Range
<1>
0.0 to 6000.0 s
Setting Range
0, 1
Setting Range
0.00 to 10.00 s
C2-04
Default
10.0 s
Default
1
Default
0.20 s
0.20 s
0.20 s
0.00 s