Mitsubishi Electric F720PJ-11KF, Manual

Page: 42 / 96

42
When setting parameters, refer to the instruction manual (applied) and understand instructions.
You can change the motor sound.

You can select the function that switches between forward rotation
and reverse rotation according to the analog input terminal
specifications and analog input level.
 For the terminals 4 used for analog input, voltage input (0 to 5V, 0 to
10V) or current input (4 to 20mA) can be selected.
To input a voltage (0 to 5V, 0 to 10V), set the voltage/current input
switch to "V". To input current (4 to 20mA), set the voltage/current
input switch to "I" and change the parameter
(Pr.267)
.
( indicates the main speed setting)

The time constant of the primary delay filter relative to external
frequency command (analog input (terminal 2, 4) signal) can be set.

Valid for eliminating noise of the frequency setting circuit.

Increase the filter time constant if steady operation cannot be
performed due to noise.
A larger setting results in slower response. (The time constant
can be set between approximately 5ms to 1s with the setting
of 0 to 8.)
72, 240, 260
Carrier frequency and Soft-PWM
selection
Pr.72 PWM frequency selection Pr.240 Soft-PWM operation selection
Pr.260 PWM frequency automatic switchover
Pr.
Number
Setting
Range
Description
72 0 to 15
You can change the PWM carrier frequency. The
setting values indicate [kHz] values during
General-purpose motor control. Note that 0
indicates 0.7kHz, 15 indicates 14.5kHz .
Under IPM motor control, the setting values
indicate the following [kHz] values.
“0 to 4”: 2.5kHz
“5 to 7”: 5kHz
“8, 9”: 7.5kHz
“10 to 12”: 10kHz
“13 to 15”: 12.5kHz
240
0 Soft-PWM is invalid
1
(initial
value)
When the PWM carrier frequency ( Pr. 72) is 5kHz
or less, the Soft-PWM function is valid.
260
0
PWM carrier frequency is constant
independently of load.
Note that continuous operation should be
performed at less than 85% of the rated inverter
current.
1
(initial
value)
Decreases PWM carrier frequency automatically
when load increases.
If continuous operation is performed at 85% of
the rated inverter current or higher and
Pr.72
(inverter carrier frequency)

"3" (3kHz) (5kHz or
higher under the IPM motor control), E.THT
(inverter overload trip) is likely to occur. To avoid
that, the carrier frequency is automatically
lowered to as low as 2kHz.
73, 267
Analog input selection
Pr.73 Analog input selection Pr.267 Terminal 4 input selection
Pr.73 setting
Terminal 2
Input
Terminal 4 Input
Reversible
Operation
0 0 to 10V
When the AU
signal is off

Not function 1
(initial value)
0 to 5V
10 0 to 10V
YES
11 0 to 5V
0

When the AU signal is
on According to the
Pr. 267 setting
0:4 to 20mA
(iinitial value)
1:1 to 5V

2:2 to 10V

Not function
1
(initial value)
10

YES
11

If the input specification to terminal 4 is changed from the current input
(
Pr. 267 = "0") to the 0 to 5V or 0 to 10V voltage input ( Pr.267 = "1 or 2"),
calibrate the input with C6.
74
Noise elimination at the analog input
Pr.74 Input filter time constant
2.5V
C3(Pr. 902)
Pr. 125
C4(Pr. 903)
C2(Pr. 902)
5V
Reverse
rotation
Forward
rotation
Set frequency (Hz)
Terminal 2
input (V)
0
Frequency setting signal
Not
reversible
Reversible