Mitsubishi Electric FR-A700 EC, Instruction Manual

Page: 156 / 826

Simple mode parameter list Basic settings
5 - 36
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Adjustment procedures are as below:
Check the conditions and simultaneously change the Pr. 820 value.
If you cannot make proper adjustment, change the Pr. 821 value and repeat the step above.
No Phenomenon/Condition Adjustment Method
1 Load inertia is large
Set the Pr. 820 and Pr. 821 values a little higher.
Pr. 820
When a speed rise is slow, increase the value 10% by 10%
until just before vibration/noise is produced, and set about 0.8
to 0.9 of that value.
Pr. 821
If an overshoot occurs, double the value until an overshoot
does not occur, and set about 0.8 to 0.9 of that value.
2
Vibration/noise generated
from mechanical system
Set the Pr. 820 value a little lower and the Pr. 821 value a little higher.
Pr. 820
Decrease the value 10% by 10% until just before vibration/
noise is not produced, and set about 0.8 to 0.9 of that value.
Pr. 821
If an overshoot occurs, double the value until an overshoot
does not occur, and set about 0.8 to 0.9 of that value.
3 Slow response
Set the Pr. 820 value a little higher.
Pr. 820
When a speed rise is slow, increase the value 5% by 5% until
just before vibration/noise is produced, and set about 0.8 to 0.9
of that value.
4
Long return time
(response time)
Set the Pr. 821 value a little lower.
Decrease the Pr. 821 value by half until just before an overshoot or the
unstable phenomenon does not occur, and set about 0.8 to 0.9 of that
value.
5
Overshoot or unstable phe-
nomenon occurs
Set the Pr. 821 value a little higher.
Double the Pr. 821 value until just before an overshoot or the unstable phe-
nomenon does not occur, and set about 0.8 to 0.9 of that value.
Tab. 5-9: Adjustment procedures for parameter 820 and 821
NOTE
When making manual input gain adjustment, set "0" (without easy gain tuning) (initial value)
in Pr. 819 "Easy gain tuning selection".