Goodrive270 series VFD for fan and pump Basic operation guidelines
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Control overshoot: When overshoot occurred, shorten the derivative time (Td) and prolong integral
time (Ti).
Before adjustment
After adjustment
Response
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.
Before adjustment
After adjustment
Response
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.
调整前
调整后
响应
时间 t
调整前
调整后
响应
时间 t
Before adjustment
After adjustment
Time t
Response
调整前
调整后
响应
时间 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.
Before adjustment
After adjustment
Response
Time t
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