Yaskawa G7 Drive - Manual (Page 352)

Individual Functions
6-
135
„ Setting Precautions
• Droop control is disabled if b7-01 is set to 0.0.
• Set b7-01 to the amount of slip as the percentage of slip when the maximum output frequency is input and
the rated torque is generated.
• Parameter b7-02 is used to adjust the responsiveness of droop control. Increase this setting if oscillation or
hunting occur.
„ Setting the Droop Control Gain
Set the droop control gain as the speed reduction at a 100% motor torque, as a percentage of the maximum
output frequency.
Fig 6.73 Droop Control Gain
‹ Zero-servo Function
The zero-servo function holds the motor when the motor is stopped in what is call a zero-servo status. This
function can be used to stop the motor even with an external force acts on the motor or the analog reference
input is offset.
The zero-servo function is enabled when one of the multi-function inputs (H1-01 to H1-10) is set to 72 (zero
servo command). If the zero servo command is ON when the frequency (speed) reference falls below the zero
speed level, a zero-servo status is implemented.
Torque
Speed
Speed reference 0
100%
b7-01