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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.
Torque
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.
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b7-01
0
Fig 6.73 Droop Control Gain
100%
Speed
Speed reference
Individual Functions
135
6-
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Table of Contents
Troubleshooting
