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PARAMETERS
62
4.2 Parameter Function Details
Pr. 3 "base frequency"
Pr. 19 "base frequency voltage"
Pr. 71 "applied motor"
Pr. 80 "motor capacity"
Pr. 180 to Pr. 183 (input terminal
(DeviceNet input) function
selection)
Related
p
arameters
4.2 Parameter Function Details
4.2.1 Torque boost (Pr. 0, Pr. 46)
Pr. 0 "torque boost"
Pr. 46 "second torque boost"
Increase the setting when the inverter-to-motor distance is long or motor torque in the
low-speed range is insufficient, for example;
"
Motor torque in the low-frequency range can be adjusted to the load to increase the
starting motor torque.
"
You can select either of the two starting torque boosts by RT terminal switching.
Parameter
Number
Factory
Setting
Setting Range Remarks
0 6% 0 to 30%
46 9999 0 to 30%, 9999 9999: Function invalid
Pr.0
Pr.46
Setting range
0
100%
Output voltage
Output frequency (Hz)
Base frequency
<Setting>
!
Assuming that the base frequency voltage is 100%, set the 0Hz voltage in %.
!
Pr. 46 "Second torque boost" is valid when the RT signal is on. (Note 3)
!
When using the inverter-dedicated motor (constant-torque motor), change the
setting as indicated below:
FR-E520-0.1KND to 0.75KND ............................................................................... 6%
FR-E520-1.5KND to 7.5KND ................................................................................. 4%
If you leave the factory setting as it is and change the Pr. 71 value to the setting for
use of the constant-torque motor, the Pr. 0 setting changes to the above value.
Note:1. This
p
arameter settin
g
is i
g
nored when the
g
eneral-
p
ur
p
ose ma
g
netic flux
vector control mode has been selected.
2. A lar
g
e settin
g
ma
y
result in an overheated motor or overcurrent tri
p
. The
guideline for the largest value for this parameter is about 10%.
3. The RT si
g
nal serves as the second function selection si
g
nal and makes the
other second functions valid. Refer to
p
a
g
e 118 for Pr. 180 to Pr. 183
(
in
p
ut
terminal (DeviceNet input) function selection).
4. When terminal
(
DeviceNet in
p
ut
)
assi
g
nment is chan
g
ed usin
g
Pr. 180 to
Pr. 183 durin
g
use of the second functions, the other functions ma
y
be
affected. Check the functions of the corres
p
ondin
g
terminals
(
DeviceNet
input) before making setting.
4