Sourcetronic ST600 - Page 123

Frequency Inverter ST600 Series High-Performance Multifunction VFD Basic Operation Instructions
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Control overmodulation: When overmodulation 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 overmodulation 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.
Before adjustment
After adjustment
Time t
Response