Mitsubishi Electric A800 Plus Series Function Manual page 84

Fine adjustment after tension PI gain tuning
• If fine adjustment is required after completion of tension PI gain tuning, adjust the proportional band (Pr.129), integral time
(Pr.130), and differential time (Pr.134).
Status of measurement values
The response is fast, but vibrations are observed.
Measured value (%)
Set point (%)
Optimal
Measured value (%)
Set point (%)
Response is slow.
Measured value (%)
Set point (%)
NOTE
• During the differential operation is used, adjust the differential time (Pr.134) while checking the stability and the response
level. (Increasing the differential time makes the differential effect larger, and decreasing the differential time makes the
differential effect smaller.)
Dancer feedback speed control details
Adjustment method
• Increase the proportional band (Pr.129). (Smaller
proportional effect)
• Increase the integral time (Pr.130). (Smaller integral effect)
Time
—
Time
• Decrease the proportional band (Pr.129). (Larger
proportional effect)
• Decrease the integral time (Pr.130). (Larger integral effect)
Time
DANCER FEEDBACK SPEED CONTROL
3
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