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5.3 C: Tuning
218
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
■
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 a Frequency Level on page 217
.
Note:
Setting C1-11 to 0.0 Hz (0.0%) disables this function.
◆
C2: S-Curve Characteristics
Use S-curve characteristics to smooth acceleration and deceleration and to minimize abrupt shock to the load. Set
S-curve characteristic time during acceleration/deceleration at start and acceleration/deceleration at stop. If the STo fault
(Pull-Out Detection) occurs when starting a PM motor, try increasing the value set to C2-01.
■
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.
explains how S-curves are applied.
Figure 5.33
Figure 5.33 S-Curve Timing Diagram - FWD/REV Operation
Setting the S-curve will increase the acceleration and deceleration times.
Actual accel time = accel time s (C2-01 + C2-02) / 2
Actual decel time = decel time s (C2-03 + C2-04) / 2
◆
C3: Slip Compensation
The Slip Compensation function improves the speed accuracy of an induction motor. By adjusting the output frequency
in accordance with the motor load, it compensates the slip and makes the motor speed equal to the frequency reference.
Note:
Perform Auto-Tuning and make sure that the motor rated current (E2-01), the motor rated slip (E2-02), and the motor no-load
current (E2-03) have all been set properly before making any adjustments to slip compensation parameters.
■
C3-01: Slip Compensation Gain
This parameter sets the gain for the motor slip compensation function. Although this parameter rarely needs to be
changed, adjustments might be needed under the following circumstances:
• If the motor at constant speed is slower than the frequency reference, increase C3-01.
• If the motor at constant speed is faster than the frequency reference, decrease C3-01.
No.
Parameter Name
Setting Range
Default
C1-11
<1> In AOLV/PM and CLV/PM control modes, the setting units and range are expressed in percent (0.0 to 100.0%) instead of in Hz.
Accel/Decel Time Switching Frequency
0.0 to 400.0 Hz
Determined by A1-02
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
C2-03
S-Curve Characteristic at Decel Start
0.20 s
C2-04
S-Curve Characteristic at Decel End
0.00 s
No.
Parameter Name
Setting Range
Default
C3-01
Slip Compensation Gain
0.0 to 2.5
Determined by A1-02
C2-02
C2-01
C2-03
C2-04
C2-02
C2-01
C2-03
C2-04
FWD run
REV run
Output
frequency
SIEP_C710636_02B_1_0.book 218 ページ 2015年11月25日 水曜日 午後4時56分