Fixed Setting Mode Of High-Speed Operation Speed (F328=3, 4) - Toshiba TOSVERT VF-S15 Instruction Manual

3.2.2 Fixed setting mode of high-speed operation speed
(f328=3, 4)
The diagram on the next page (Fig.2) is the timing chart when fixed setting mode of the high-speed
operation speed (f328=3) is applied to lift application.
At the operation frequency of the light-load high-speed operation switching lower limit frequency (f331)
or more (point A in the Fig.2), if an average torque during the light-load high-speed operation load
detection time (f333) after reaching the set speed and after a lapse of the light-load high-speed
operation load detection waiting time (f332) is under the switching load torque during power running
(f335), the inverter judges that light-load is detected and accelerates up to an automatic light-load
high-speed operation frequency (f330). (Point B in the Fig.2 Light-load high-speed operation)
Load torque detection is carried out when an operation frequency is the light-load high-speed operation
switching lower limit frequency (f331) or more and after reaching the set speed.
When reaching the conditions below, the light-load high-speed operation is canceled and the operation is
returned to the operation at the frequency of speed command value.
1) The torque is exceeded the heavy-load torque (f336) during acceleration up to the automatic
light-load high-speed operation frequency (f330).
2) The torque is exceeded the heavy-load torque during constant power running (f337) after
reaching the automatic light-load high-speed operation frequency (f330) and after a lapse of the
light-load high-speed operation heavy load detection time (f334).
3) The speed command value under the light-load high-speed operation switching lower limit frequency
(f331) is entered.
4) The Light-load high-speed operation prohibitive signal is ON.
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