C2: S-Curve Characteristics; C3: Slip Compensation - YASKAWA GA800 Technical Reference

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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.
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.
Name
(Hex.)
C2-01 S-Curve Time @ Start of
Accel
(020B)
■
C2-02: S-Curve Time @ End of Accel
No.
Name
(Hex.)
C2-02 S-Curve Time @ End of
Accel
(020C)
■
C2-03: S-Curve Time @ Start of Decel
No.
Name
(Hex.)
C2-03 S-Curve Time @ Start of
Decel
(020D)
■
C2-04: S-Curve Time @ End of Decel
No.
Name
(Hex.)
C2-04 S-Curve Time @ End of
Decel
(020E)
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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.
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Figure 12.50 S-Curve Timing Diagram - Forward/Reverse Operation
V/f CL-V/f OLV CLV
Sets the S-curve acceleration time at start.
V/f CL-V/f OLV CLV
Sets the S-curve acceleration time at completion.
V/f CL-V/f OLV CLV
Sets the S-curve deceleration time at start.
V/f CL-V/f OLV CLV
Sets the S-curve deceleration time at completion.
Description
AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
12.4 C: Tuning
Default
(Range)
Determined by A1-02
(0.00 - 10.00 s)
Default
(Range)
0.20 s
(0.00 - 10.00 s)
Default
(Range)
0.20 s
(0.00 - 10.00 s)
Default
(Range)
0.00 s
(0.00 - 10.00 s)
12
775