5.3 C: Tuning
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 187
Setting 1: Enabled (6 Hz and above)
Slip compensation is enabled during regenerative operation. It will not be active at output frequencies below 6 Hz.
Setting 2: Enabled (compensation provided wherever possible)
Slip compensation is enabled during regenerative operation, and at frequencies as low as 2 Hz. The drive uses the motor
rated slip set in E2-02 to automatically calculate the frequency range where compensation will be disabled.
C3-05: Output Voltage Limit Operation Selection
Determines if the motor flux reference is automatically reduced when output voltage reaches the saturation range.
If the input power supply voltage is low or t
he motor has a high voltage rating, this function can help improve the speed
precision when moving heavy loads at high speeds. When this function is enabled, the reduction in flux causes a slightly
higher current at high speed. Keep this in mind when selecting the drive.
Note: Available control mode for parameter C3-05 varies by drive model:
CIMR-A2A0004 to 2A0415 and 4A0002 to 4A0675: Available when A1-02 = 2, 3
CIMR-A4A0930 and 4A1200: Available when A1-02 = 2, 3, 6, 7
Setting 0: Disabled
Setting 1: Enabled
C3-16: Output Voltage Limit Operation Start Level (Percentage Modulation)
Sets the output voltage limit operation start level (percentage modulation) when C3-05 is enabled.
Note: This parameter is available in models CIMR-A4A0930 and 4A1200.
C3-17: Maximum Output Voltage Limit Level (Percentage Modulation)
Sets the output voltage limit operation determined by C3-18 (percentage modulation) when C3-05 is enabled.
Note: This parameter is available in models CIMR-A4A0930 and 4A1200.
C3-18: Output Voltage Limit Level
Sets the maximum percentage of output voltage reduction when C3-05 is enabled.
Note: This parameter is available in models CIMR-A4A0930 and 4A1200.
C3-21: Motor 2 Slip Compensation Gain
Used to improve speed accuracy for motor 2. Functions in the same way that C3-01 functions for motor 1.
Adjust this parameter only after the motor rated current (E4-01),
motor rated slip (E4-02), and the motor no-load current
(E4-03) have all been set.
Refer to C3-01: Slip Compensation Gain on page 186 for details on adjusting this parameter
.
Note: Default setting is 0.0 in V/f Control (E3-01 = 0). Default setting is 1.0 in Open Loop Vector Control (E3-01 = 2) and Closed Loop
Vector Control (E3-01 = 3). In Closed Loop Vector Control, slip compensation gain acts as an adaptable gain.
No. Parameter Name Setting Range Default
C3-05 Output Voltage Limit Operation Selection 0 or 1 0
No. Parameter Name Setting Range Default
C3-16 Output Voltage Limit Operation Start Level 70.0 to 90.0% 85.0%
No. Parameter Name Setting Range Default
C3-17 Maximum Output Voltage Limit Level 85.0 to 100.0% 90.0%
No. Parameter Name Setting Range Default
C3-18 Output Voltage Limit Level 30.0 to 100.0% 90.0%
No. Parameter Name Setting Range Default
C3-21 Motor 2 Slip Compensation Gain 0.0 to 2.5 Determined by E3-01
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