INVT Goodrive350 Series Operation Manual page 121

Goodrive350 IP55 High-ingress Protection Series VFD Basic operation guidelines
Response Before adjustment
After adjustment
Time t
Stabilize the feedback value as fast as possible: When overshoot occurred, shorten integral
time (Ti) and prolong derivative time (Td) to stabilize control as fast as possible.
After adjustment
Response
Before adjustment
Time t
Control long-term vibration: If the cycle of periodic vibration is longer than the set value of
integral time (Ti), it indicates the integral action is too strong, prolong the integral time (Ti) to
control vibration.
Before adjustment
Response
After adjustment
Time t
Control short-term vibration: If the vibration cycle is as short almost the same as the set value
of differential time (Td), it indicates the differential action is too strong. Shorten the differential
time (Td) to control vibration. When the differential time (Td) is set to 0.00 (namely no
differential control), and there is no way to control vibration, decrease the proportional gain.
Response
Before adjustment
After adjustment
Time t
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