YASKAWA A1000 Technical Manual page 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 the 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-A2A0004 to 2A0415 and 4A0002 to 4A0675: Available when A1-02 = 2, 3
CIMR-A4A0930 and 4A1200: Available when A1-02 = 2, 3, 6, 7
No.
C3-05 Output Voltage Limit Operation Selection
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-A4A0930 and 4A1200.
No.
C3-16 Output Voltage Limit Operation Start Level

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-A4A0930 and 4A1200.
No.
C3-17

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-A4A0930 and 4A1200.
No.
C3-18

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
No.
C3-21
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.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Parameter Name
Parameter Name
Parameter Name
Maximum Output Voltage Limit Level
Parameter Name
Output Voltage Limit Level
Parameter Name
Motor 2 Slip Compensation Gain
Setting Range
0 or 1
Setting Range
70.0 to 90.0%
Setting Range
85.0 to 100.0%
Setting Range
30.0 to 100.0%
for details on adjusting this parameter.
Setting Range
0.0 to 2.5
5.3 C: Tuning
Default
0
Default
85.0%
Default
90.0%
Default
90.0%
5
Default
Determined by E3-01
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