Toshiba TOSVERT VF-A7 User Manual

E6581172①
3
4. Operation
Typical examples of light-load high-speed operation are first described.
The following figure is a timing chart in case of using the automatic mode of light-load high-speed operation
(F330=2):
Example: Automatic mode of light-load high-speed operation (F330=2): Forward run
The judgement of light load or heavy load shall be performed using the absolute value of torque current.
Light-load detection shall be performed when the operation frequency is light-load high-speed operation switching
lower limit frequency (F331) or higher after the speed is achieved.
Heavy load detection or the input of directed speed value less than light-load high-speed operation switching
lower limit frequency (F331) during high-speed operation cancels high-speed operation, returning to the directed
speed frequency operation.
Light-load high-speed
operation switching lower
limit frequency F331
F102 achieved speed detection width
Light-load high-speed operation
F102 achieved speed detection width
Heavy load detection period during acceleration in forward direction
Heavy load detection period during fixed
speed in forward direction
Switching load level
Load detection waiting time
F332
Load detection Time
F333
Determined to be light load
Load detection waiting time
F332
A
utomatic light-load
high-speed operation
frequency F341
Light-load detection period
ON
OFF
ONOFF
｜Torque current (％)｜
Directed speed value
Frequency (Hz)
UL
Operation signal
A
chieved speed signal
F336
F337
F335
Time
(seconds)

Toshiba TOSVERT VF-A7 Specifications

General

Brand	Toshiba
Model	TOSVERT VF-A7
Category	Inverter
Language	English