INVT Goodrive350-19 Series Operation Manual page 358

Goodrive350-19 series VFD for crane
Function
Name
code
Load limit T1 in
stepped speed
P91.18
limit upward
running
Restricted
frequency f1 in
P91.19 stepped speed
limit upward
running
Description
For example, when P00.03=100Hz,
P91.16=90.0%, and motor rated
frequency=50.00Hz:
If the detected load value during motor upward
running is 30.0%, the limited
frequency=150Hz(90.0%*50.00Hz/30.0%), the
calculated limited frequency is higher than
P00.03. If P91.08=1, the set frequency P00.03 is
used for running. If P91.08=2, the constant
power speed limit frequency does not work, and
the set frequency is used for running.
If the detected load value during motor upward
running is 60.0%, the limited frequency
=75Hz(90.0%*50.00Hz/60.0%), the heavy load
speed limit function works. The upward max.
output frequency is limited to 75Hz. If P91.08=1,
the frequency 75Hz is used for running. If
P91.08=2, the max. running frequency is 75Hz,
and the set frequency is used for running.
The similar calculation method is applicable to
motor downward running, only replacing
with P91.17.
Note: During open/closed loop switchover (there
is difference in load detection value), adjust
P91.16 and P91.17, and the heavy load speed
limit frequency cannot be lower than the heavy
load speed limit detection frequency P91.14.
P91.16, P91.17 setting range: 30.0%–120.0%
(of the motor rated power)
Limited frequency f
Max. output
P00.03
P91.23 (f3)
P91.21 (f2)
P91.19 (f1)
P91.20
P91.22
(T3)
When the stepped speed limit mode is used, the
-346-
frequency
Load
P91.18
Tmax
(T2) (T1)
Function parameter list
Default
P91.16
70.0%
T
50.00Hz
Modify
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