Mitsubishi Electric F720PJ-11KF, Manual

Page: 33 / 96

Features
Options
Precautions
Motor
Connection
example
Standard
specs.
Outline
dimensions
Parameter
list
Parameter
descriptions
Protective
functions
IPM motor
control
Compatibility
W
a
rranty
Te
rminal connection
diagrams
T
e
rminal specs.
Operation panel
Parameter unit
FR Configurator
33
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Explanation of Parameters
You can compensate for a voltage drop in the low-frequency
region to improve motor torque reduction in the low-speed region.
 Motor torque in the low-frequency range can be adjusted to the load
to increase the starting motor torque.

The RT signal switches between two start torque boost settings.
 Enabled only under V/F control.
You can limit the motor speed.

Clamp the upper and lower limits of the output frequency.

To operate with a frequency higher than 120Hz under V/F control or
General-purpose magnetic flux vector control, set the upper limit for
the output frequency in
Pr. 18 .
(When Pr. 18 is set, Pr. 1 automatically switches to the frequency of
Pr. 18 . Also, when Pr. 1 is set, Pr. 18 is automatically changed to the
frequency set in Pr. 1 .)
 Used to adjust the inverter outputs (voltage, frequency) to the motor
rating.
 When operating a standard motor, generally set the rated frequency
of the motor to
Pr. 3 Base frequency . When running the motor using
commercial power supply-inverter switch-over operation, set Pr. 3 to
the same value as the power supply frequency.
 When you want to change the base frequency when switching
multiple motors with one inverter, use the
Pr. 47 Second V/F (base
frequency) .

Use Pr. 19 Base frequency voltage to set the base voltage (e.g. rated
motor voltage).

Enabled only under V/F control.
Can be used to change the preset speed in the parameter with the
contact signals.
Any speed can be selected by merely turning on-off the contact
signals (RH, RM, RL, REX signals).

The inverter operates at frequencies set in Pr. 4 when RH signal is
on, Pr. 5 when RM signal is on and Pr. 6 when RL signal is on.

Frequency from speed 4 to speed 15 can be set according to the
combination of the RH, RM, RL and REX signals. Set the running
frequencies to
Pr. 24 to Pr. 27, Pr. 232 to Pr. 239
. (In the initial value
setting, speed 4 to 15 are unavailable.)
In the following section, the following marks indicate the operable controls:
........V/F control (General-purpose motor),
........General-purpose magnetic flux vector control (General-purpose motor),
........IPM motor control (dedicated IPM motor). (Parameters without any marks are valid for all controls.)
Also the following marks indicate parameter types:
................Simple mode parameters, ..................Extended parameters
V/F V/F V/F
GP
MFVC
GP
MFVC
GP
MFVC
IPM IPM IPM
0, 46
Manual torque boost
Pr.0 Torque boost Pr.46 Second torque boost

If the initial set
Pr. 71
value is
changed to the setting for use
with a constant-torque motor,
the
Pr. 0
setting changes to the
corresponding value in above.
1, 2, 18
Maximum/minimum frequency
Pr.1 Maximum frequency Pr.2 Minimum frequency
Pr.18 High speed maximum frequency
V/F V/F V/F
Output voltage
Pr. 0
Pr. 46
Setting range
Base frequency 0
100%
Output frequency (Hz)
Pr.0 Initial
Value
When
using the
Mitsubishi
constant
torque
motor
0.75K or
lower
6% 
1.5K to 3.7K 4% 
5.5K, 7.5K 3% 2%

11K, 15K 2% 
Output frequency
(Hz)
Pr. 1
Pr. 18
Pr. 2 Frequency setting
Clamped at the
maximum frequency
Clamped at the
minimum frequency
5, 10V
(20mA)
0
(4mA)
3, 19, 47
Base frequency, voltage
Pr.3 Base frequency Pr.19 Base frequency voltage
Pr.47 Second V/F (base frequency)
4 to 6, 24 to 27, 232 to 239
Multi-speed setting operation
Pr.4 Multi-speed setting (high speed) Pr.5 Multi-speed setting (middle speed)
Pr.6 Multi-speed setting (low speed) Pr.24 Multi-speed setting (speed 4)
Pr.25 Multi-speed setting (speed 5) Pr.26 Multi-speed setting (speed 6)
Pr.27 Multi-speed setting (speed 7) Pr.232 Multi-speed setting (speed 8)
Pr.233 Multi-speed setting (speed 9) Pr.234 Multi-speed setting (speed 10)
Pr.235 Multi-speed setting (speed 11) Pr.236 Multi-speed setting (speed 12)
Pr.237 Multi-speed setting (speed 13) Pr.238 Multi-speed setting (speed 14)
Pr.239 Multi-speed setting (speed 15)
V/F V/F V/F
Pr. 19
Output voltage (V)
Output frequency
(Hz)
Pr. 3
Pr. 47
Time
ON ON ON ON ON ON ON ON
ON ON ON ON
ON ON ON ON
ON ON ON ON
RH
RM
RL
REX
∗
ON ON ON
ON ON
ON ON
ON
Speed 1
(High speed)
Speed 2
(Middle speed)
Speed 3
(Low speed) Speed 4
Speed 5
Speed 6
Speed 7
Speed 8
Speed 9
Speed 10
Speed 11
Speed 12
Speed 13
Speed 14
Speed 15
ON
ON
ON
Output frequency (Hz)

When turning RH, RM and RL off and REX on with "9999" set in
Pr.
232 "multi speed setting (8 speed), the inverter operates at frequency
set in
Pr. 6
.