Toshiba TOSVERT VF-A7 Manual page 14

Example: Automatic light-load high-speed operation mode (F330=2): Forward run
Frequency (Hz)
UL
Automatic light-load
high-speed operation
frequency F341
Directed speed value
Light-load high-speed
operation switching lower
limit frequency F331
Load detection waiting time
F332
Operation signal
Achieved speed signal
Load condition
Light-load detection
signal
Heavy load detection
signal
Light-load
detection time
F333
Heavy load torque current
during acceleration in forward
direction F336
Heavy load torque current
during constant speed in
forward direction F337
Switching load torque current
during forward run F335
Determined to be
light load.
Light-load high-speed
operation
F102
achieved speed
detection width
F332
E
A B C F
D H
G
Heavy load
detection period
during acceleration
Determined to
be light load.
Light-load high-speed
operation
F102 achieved speed
detection width
J
L
K
N
F334
G
Heavy load
detection time
F334
Determined to Determined to
be light load. be heavy load.
13
E6581172①
Time
M (seconds)
F334
Determined to
be heavy load.