INVT Goodrive350-19 Series Operation Manual page 353

Goodrive350-19 Series VFD for Crane
Function
Name
code
Smooth lifting
P93.33
window time
Smooth lifting
P93.34 protection
frequency
Smooth lifting
torque change rate
P93.35
protection point 1
(at low speed)
Smooth lifting
torque change rate
P93.36
protection point 2
(at high speed)
Smooth lifting
torque change rate
protection point 3
P93.37
(exiting smooth
lifting)
Description
0.0–20.0s
When P93.20=1,
protection is enabled to attenuate the shock
caused by violent jitter up and down when the
load is lifted and by sudden changes in load
during high-speed running.
When the running frequency is greater than
P93.34, if the detected torque change rate is
greater than the smooth lifting torque change
rate protection point (specified by P93.35 or
P93.36; the boundary frequency between low
speed and high speed is P93.38), the smooth
lifting function is enabled, and the smooth lifting
function set frequency (P93.34) is used. At this
time, if the detected torque change rate is less
than the smooth lifting torque change rate
protection point 3 (specified by P93.37),
acceleration to the set frequency is executed.
1. Timing of handling exceptions detected at
gear-1 constant speed
Output
frequency
Speed of
gear 1
P93.34
Load change
rate
P93.36
P93.37
Start/stop
command
2. Timing of handling exceptions detected at
gear-2 ACC
-341-
indicating stable
Time
Time
Start
Function parameters
Default Modify
○
2.0s
lifting
○
10.00Hz
○
40.0%/s
○
40.0%/s
○
10.0%/s