<2> Default settings change when the Control Method is changed (A1-02) or a different V/f pattern is selected using parameter E1-03. The defaultsetting shown is for V/f Control.When using OLV Motor Control, leave the torque compensation gain (C4-01) at its default setting of 1.00. To increasespeed precision during regeneration in OLV Motor Control, enable slip compensation during regeneration (C3-04 = “1”).u Motor Hunting and Oscillation Control ParametersIn addition to the parameters discussed on page 162, the following parameters indirectly affect motor hunting andoscillation.Table 6.3 Parameters that Affect Control Performance in ApplicationsName (Parameter No.) ApplicationDwell Function (b6-01 through b6-04) Prevents motor speed loss by maintaining the output frequency when working with heavy loads or whenthere is powerful backlash on the machine side.Accel/Decel Time (C1-01 throughC1-09) Adjusting accel and decel times will affect the torque presented to the motor during acceleration ordeceleration.S-Curve Characteristics (C2-01through C2-04) Prevents shock at the beginning and end of acceleration and deceleration.Jump Frequency (d3-01 through d3-04) Skips over the resonant frequencies of connected machinery.Analog Filter Time Constant (H3-13) Prevents fluctuation in the analog input signal due to noise.Stall Prevention (L3-01 through L3-06,L3-11)• Prevents motor speed loss and overvoltage. Used when the load is too heavy and also during suddenacceleration/deceleration.• Adjustment is not normally required because Stall Prevention is enabled as a default. Disable StallPrevention during deceleration (L3-04 = “0”) when using a braking resistor.Torque Limits (L7-01 through L7-04,L7-06, L7-07)• Sets the maximum torque for Open Loop Vector Control.• Ensure that the drive capacity is greater than the motor capacity when increasing this setting. Be carefulwhen reducing this value because motor speed loss may occur with heavy loads.6.2 Motor Performance Fine Tuning248 YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
