Mitsubishi Electric FR-D720S SC EC, Instruction Manual

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Set V/f pattern Parameter
6 - 44
6.4 Set V/f pattern
6.4.1 Base frequency, voltage (Pr. 3, Pr. 19, Pr. 47)
Used to adjust the inverter outputs (voltage, frequency) to the motor rating.
The above parameter can be set when Pr. 160 = 0.
Setting of base frequency (Pr. 3)
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.
If the frequency given on the motor rating plate is "60Hz" only, always set to "60Hz". It may result
in an inverter trip due to overload. Caution must be taken especially when Pr. 14 "Load pattern
selection" = "1" (variable torque load)
Purpose Parameters that must be set
Refer to
Section
Set motor ratings Base frequency, Base frequency voltage Pr. 3, Pr. 19,
Pr. 47 6.4.1
Select a V/f pattern according to
applications Load pattern selection Pr. 14 6.4.2
Pr.
No.
Name Initial Value Setting Range Description Parameters referred to
Refer to
Section
3
Base frequency 50Hz 0–400Hz
Set the frequency when the motor
rated torque is generated. (50Hz/
60Hz)
14
29
83
84
178–182
Load pattern
selection
Acceleration/decel-
eration pattern
selection
Motor rated
voltage
Rated motor fre-
quency
Input terminal
function selection
General-purpose
magnetic flux vec-
tor control 6.4.2
6.6.3
6.7.3
6.7.3
6.9.1
6.2.2
19
Base frequency
voltage
8888
0–1000V Set the rated motor voltage.
8888 95% of power supply voltage
9999 Same as power supply voltage
47
Second V/f
(base frequency)
9999
0–400Hz
Set the base frequency when the RT
signal is on.
9999 Second V/f invalid
I000003aC
Fig. 6-11: Output voltage related to the output frequency
V/F V/F V/F
50 60 120
[Hz]
100
[%]
Base frequency setting range
Setting r
a
nge Pr
. 19
Output v
o
ltage
related to the
po
w
e
r supply v
o
ltage
Pr. 3 = 50Hz, Pr. 19 = 9999
Pr. 3 = 60Hz, Pr. 19 = 220V