INVT Goodrive350-19 Series Operation Manual page 373

Goodrive350-19 series VFD
Function
Name
code
restricted
frequency f1
Stepped speed
limit upward
P91.20
running
load limit T2
Stepped speed
limit upward
P91.21 running
restricted
frequency f2
Stepped speed
limit upward
P91.22
running
load limit T3
Stepped speed
limit upward
P91.23 running
restricted
frequency f3
Stepped speed
limit upward
P91.24 running
load limit adjusted
gain
Stepped speed
limit downward
P91.25 running
torque limit
adjusted gain
Stepped speed
limit downward
P91.26
running
load limit T1
Stepped speed
P91.27 limit downward
running
Description
When the stepped speed limit mode is used, the
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 P91.19 (or when the set
frequency is less than P91.19, the running
frequency is the set frequency). When the
detected load is greater than P91.20 (but 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. P91.24 is valid for
P91.18, P91.20, and P91.22.
For example, when the same load is carried
upward and tested,
closed-loop state and P94.01=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
P91.24 to 5.0% (0 in closed-loop state), and you
do not need to modify P91.18, P91.20, and
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 current, while
- 366 -
if P94.01=50.0%
Function parameter list
Default
Modify
value
○
45.0%
○
75.00Hz
○
25.0%
○
100.00Hz
in
○
0.0%
○
0.0%
○
55.0%
○
50.00Hz