Mitsubishi Electric FR-A720-0.4K Instruction Manual page 114

Parameter
Name
PWM frequency
72
selection
Soft-PWM
240
operation selection
Analog input
73
selection
Terminal 1 added
compensation
242
amount (terminal 2)
Terminal 1 added
compensation
243
amount (terminal 4)
Override bias
252
Override gain
253
Terminal 4 input
267
selection
Input filter time
74
constant
Speed setting filter 1
822
Torque setting filter 1
826
Speed setting filter 2
832
Torque setting filter 2
836
Analog input offset
849
adjustment
Incre- Initial
Range
ments Value
PWM carrier frequency can be changed.
The setting displayed is in [kHz].
Note that 0 indicates 0.7kHz, 15 indicates
14.5kHz, 25 indicates 2.5. (25 is
exclusively for a sine wave filter.)
0 to 15/
The following settings are for Real
1 2
0 to 6, 25
sensorless vector control and vector
*
control.
0 to 5: 2kHz, 6 to 9: 6kHz,
10 to 13: 10kHz, 14 to 15: 14kHz
* The setting range differs according to the
0 Soft-PWM invalid
1 1 When Pr. 72 = "0 to 5" ("0 to 4" for the 75K
1
or higher), Soft-PWM is valid.
You can select the input specifications of
terminal 2 (0 to 5V, 0 to 10V, 0 to 20mA)
and input specifications of terminal 1 (0 to
±5V, 0 to ±10V).
To change the terminal 2 to the voltage
0 to 7, input specification (0 to 5V/ 0 to 10V), turn
1 1
10 to 17 OFF (initial status) the voltage/current
input switch 2. To change it to the current
input (0 to 20mA), turn ON the voltage/
current input switch 2.
Override and reversible operation can be
selected.
Set the ratio of added compensation
0.1% 100% 0 to 100%
amount when terminal 2 is the main speed.
Set the ratio of added compensation
0.1% 75% 0 to 100%
amount when terminal 4 is the main speed.
Set the bias side compensation value of
0.1% 50% 0 to 200%
override function.
Set the gain side compensation value of
0.1% 150% 0 to 200%
override function.
Terminal 4 input
0
4 to 20mA
1 0
Terminal 4 input
1
0 to 5V
Terminal 4 input
2
0 to 10V
The primary delay filter time constant for
1 1 0 to 8 the analog input can be set.
A larger setting results in slower response.
Set the time constant of the primary delay
0 to 5s,
0.001s 9999 filter relative to the external speed
9999
command (analog input command).
Set the time constant of the primary delay
0 to 5s,
0.001s 9999 filter relative to the external torque
9999
command (analog input command).
0 to 5s, Second function of Pr. 822 (valid when the
0.001s 9999
9999 RT terminal is on)
0 to 5s, Second function of Pr. 826 (valid when the
0.001s 9999
9999 RT terminal is on)
This function provides speed command by
analog input (terminal 2) with offset and
0.1% 100% 0 to 200%
avoids frequency command to be given
due to noise under 0 speed command.
Description
inverter capacity. (55K or lower/75k or higher)
Turn ON the
voltage/current
input switch
1(initial status).
Turn OFF the
voltage/current
input switch 1.
Parameter List
: enabled
× : disabled
×
×
3
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