5.3 C: TuningYASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 187Parameter Details5Setting 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 motorrated slip set in E2-02 to automatically calculate the frequency range where compensation will be disabled. C3-05: Output Voltage Limit Operation SelectionDetermines 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 speedprecision when moving heavy loads at high speeds. When this function is enabled, the reduction in flux causes a slightlyhigher 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, 3CIMR-A4A0930 and 4A1200: Available when A1-02 = 2, 3, 6, 7Setting 0: DisabledSetting 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 LevelSets 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 GainUsed 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 LoopVector Control (E3-01 = 3). In Closed Loop Vector Control, slip compensation gain acts as an adaptable gain.No. Parameter Name Setting Range DefaultC3-05 Output Voltage Limit Operation Selection 0 or 1 0No. Parameter Name Setting Range DefaultC3-16 Output Voltage Limit Operation Start Level 70.0 to 90.0% 85.0%No. Parameter Name Setting Range DefaultC3-17 Maximum Output Voltage Limit Level 85.0 to 100.0% 90.0%No. Parameter Name Setting Range DefaultC3-18 Output Voltage Limit Level 30.0 to 100.0% 90.0%No. Parameter Name Setting Range DefaultC3-21 Motor 2 Slip Compensation Gain 0.0 to 2.5 Determined by E3-01
