Parameter Details
12
12.4 C: Tuning
YASKAWA SIEPC71061737D GA800 Drive Technical Reference 775
◆ 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.
The following figure explains how S-curves are applied.
Figure 12.50 S-Curve Timing Diagram - Forward/Reverse Operation
Note:
• If STPo [Motor Step-Out Detected] occurs when starting a PM motor, try increasing the value set to C2-01.
• Setting the S-curve will increase the acceleration and deceleration times.
■ C2-01: S-Curve Time @ Start of Accel
No.
(Hex.)
Name Description
Default
(Range)
C2-01
(020B)
S-Curve Time @ Start of
Accel
Sets the S-curve acceleration time at start.
Determined by A1-02
(0.00 - 10.00 s)
■ C2-02: S-Curve Time @ End of Accel
No.
(Hex.)
Name Description
Default
(Range)
C2-02
(020C)
S-Curve Time @ End of
Accel
Sets the S-curve acceleration time at completion.
0.20 s
(0.00 - 10.00 s)
■ C2-03: S-Curve Time @ Start of Decel
No.
(Hex.)
Name Description
Default
(Range)
C2-03
(020D)
S-Curve Time @ Start of
Decel
Sets the S-curve deceleration time at start.
0.20 s
(0.00 - 10.00 s)
■ C2-04: S-Curve Time @ End of Decel
No.
(Hex.)
Name Description
Default
(Range)
C2-04
(020E)
S-Curve Time @ End of
Decel
Sets the S-curve deceleration time at completion.
0.00 s
(0.00 - 10.00 s)
◆ C3: Slip Compensation
The Slip Compensation function improves the speed accuracy of an induction motor. As loads on induction motors
increase, motor slip increases and motor speed decreases. 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.
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