Fixed Setting Mode Of High-Speed Operation Speed (F328=3, 4) - Toshiba TOSVERT VF-AS1 Instruction Manual

4.1.2. 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 above the light-load high-speed operation switching lower limit frequency
(f331) (point A in the Fig.2), if an average torque during the light-load high-speed operation load
detection time (f333) after completion of speed reach and after the light-load high-speed operation
load detection waiting time (f332) has elapsed is below the switching load torque during power running
(f335), the inverter judges to be light-load detection and is more accelerated up to an automatic
light-load high-speed operation frequency (f330).
operation)
Load torque detection is carried out after speed reach when an operation frequency is above the light-load
high-speed operation switching lower limit frequency (f331).
When each of conditions below is reached, the light-load high-speed operation is canceled and the
operation is returned to the frequency corresponding to a speed command value.
① If a heavy-load torque (f336) is exceeded during acceleration up to the automatic light-load
high-speed operation frequency (f330).
② If a heavy-load torque during constant power running (f337) is exceeded 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 If a speed command value less than the light-load high-speed operation switching lower limit
frequency (f331) is entered.
Note: The torque monitor at the light-load high-speed switching (detected value) is updated for every
operation.
These values can be monitored by setting the standard monitor parameter (f710) and status
monitor parameters 1 to 8 (f711 to f718).
Function
Light-load high-speed torque
monitor 1
(Detection torque monitor at
operation switching)
Light-load high-speed torque
monitor 2
(Detection torque monitor at
constant speed operation)
Description
Average torque during light-load high-speed operation
load detection time (f333) after a lapse of light-load
high-speed operation load detection waiting time
(f332)
Average torque after reaching automatic light-load
high-speed operation frequency (f330) and after a
lapse of light-load high-speed operation heavy load
detection time (f334)
7
(Point B in the Fig.2 Light-load high-speed
E6581327
Monitor
output
Setting No.
64
Setting No.
65