AC70T Crane Purpose VFD Manual
54
4.15 Light load speed up function
FF.28
Light load upscaling
function selection
0: Invalid
1: Judging by current
0
FF.29
Load measurement
time
0.000
～
10.000s 1.000s
FF.30
Upward upswing
judgment threshold
0.0
～
100.0%
50.0%
FF.31
Up frequency up
frequency limit
0.00
～
100.00Hz 65.00Hz
FF.32
Downward upselling
threshold
0.0
～
100.0% 50.0%
FF.33
Downward frequency
up frequency
0.00
～
100.00Hz
65.00Hz
When the output frequency is equal to the motor rated frequency F5.03, the up-convert value is judged after the
FF.29 set time is maintained, and if the up-conversion condition is satisfied, the up-conversion is performed. Take the
current judgment as an example for explanation: when going up, when the output current (the percentage of the rated
motor current) is less than FF.30, the frequency is raised, the frequency of the boost is limited by FF.31; when the line
is down, when the output current (the rated current of the motor) When the percentage is less than FF.32, the
frequency is increased. The frequency of the boost is limited by FF.33.
