YASKAWA E1000 User Manual

5.3 C: Tuning
162 YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
◆ C2: S-Curve Characteristics
Use S-curve characteristics to smooth acceleration and to minimize abrupt shock to the load. Set S-curve characteristic
time during acceleration at start and acceleration at stop. If the STo fault (Hunting Detection) occurs when starting a PM
motor, try increasing the value set to C2-01.
■
C2-01 and C2-02: S-Curve Characteristics
C2-01 and C2-02 set separate S-curves for each section of the acceleration.
Figure 5.21 explains how S-curves are applied.
Figure 5.21
Figure 5.21 S-Curve Timing Diagram - FWD/REV Operation
Setting the S-curve will increase the acceleration times.
Actual accel time = accel time setting + (C2-01 + C2-02) / 2
◆ C4: Torque Compensation
The torque compensation function compensates for insufficient torque production at start-up or when a load is applied.
Note: Make sure the motor parameters and V/f pattern are set properly before setting torque compensation parameters.
■ C4-01: Torque Compensation Gain
Sets the gain for the torque compensation function.
Torque Compensation in V/f and OLV/PM:
The drive calculates the motor primary voltage loss using the output current and the termination resistor value (E2-05 for
IM, E5-05 for PM motors) and then adjusts the output voltage to compensate insufficient torque at start or when load is
applied. The effects of this voltage compensation can be increased or decreased using parameter C4-01.
Adjustment
Although this parameter rarely needs to be adjusted, changing the torque compensation gain in small steps of 0.05 may
help in the following situations:
• Increase this setting when using a long motor cable.
• Decrease this setting when motor oscillation occurs.
Adjust C4-01 so that the output current does not exceed the drive rated current.
Note: Refrain from adjusting this parameter in OLV/PM. Too high a value can cause overcompensation, resulting in motor oscillation.
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
<1> S-Curve characteristic at Decel Start/End is fixed to 0.20 s.
No. Parameter Name Setting Range Default
C4-01 Torque Compensation Gain 0.00 to 2.50 Determined by A1-02
C2-02
C2-01
0.20 s
<1>
0.20 s <1>
C2-02
C2-01
0.20 s
<1>
0.20 s <1>
FWD run
REV run
Output
frequency
common_TMonly
SIEP_C710616_35.book 162 ページ ２０１５年１１月３０日 月曜日 午後２時２分

YASKAWA E1000 Specifications

General

Brand	YASKAWA
Model	E1000
Category	Controller
Language	English