INVT Goodrive350-19 Series Operation Manual page 359

Goodrive350-19 series VFD for crane
Function
Name
code
Load limit T2 in
stepped speed
P91.20
limit upward
running
Restricted
frequency f2 in
P91.21 stepped speed
limit upward
running
Load limit T3 in
stepped speed
P91.22
limit upward
running
Restricted
frequency f3 in
P91.23 stepped speed
limit upward
running
Load limit
adjusted gain in
P91.24 stepped speed
limit upward
running
Torque limit
adjusted gain in
P91.25 stepped speed
limit downward
running
Load limit T1 in
stepped speed
P91.26
limit downward
running
Restricted
frequency f1 in
P91.27 stepped speed
limit downward
running
Description
limit parameters for upward running and for
downward running are set separately and can
be adjusted according to the actual situation.
When the detected load (open-loop output
current or closed-loop output torque) exceeds
the limited value, the running frequency must be
lower than the set restricted frequency.
For example, during motor upward running,
when the detected load is greater than P91.18,
the frequency is restricted to
the set frequency is less than P91.19, the
running frequency is the set frequency). When
the detected load is greater than
less than P91.18), the frequency is restricted to
P91.21.
The detected load values in open/closed loop
state have deviation. During the open/closed
loop switchover process, the load limit value can
be adjusted through P91.24.
P91.18, P91.20, and P91.22.
For example, when the same load is carried
upward and tested, if P19.11=50.0% in
closed-loop state and P19.11=55.0% in
open-loop state, there is a difference of 5%. In
the actual use, after setting closed-loop
parameters, if you need to switch to the
open-loop state, you only need to set
5.0% (0 in closed-loop state), and you do not
need to modify P91.18, P91.20, or P91.22.
The situation of downward running is similar and
therefore you only need to set parameters
related to downward running.
Note: The heavy load speed limit frequency
cannot be lower than P91.14.
P91.18, P91.20, P91.22, P91.26, P91.28,
P91.30 setting range: 0.0%–150.0% (Open-loop
output current is relative to the motor rated
-347-
Function parameter list
P91.19 (or when
P91.20 (but
P91.24 is valid for
P91.24 to
Default Modify
○
45.0%
○
75.00Hz
○
25.0%
○
100.00Hz
○
0.0%
○
0.0%
○
55.0%
○
50.00Hz