Mitsubishi Electric F720PJ-11KF, Manual

Page: 37 / 96

Features
Options
Precautions
Motor
Connection
example
Standard
specs.
Outline
dimensions
Parameter
list
Parameter
descriptions
Protective
functions
IPM motor
control
Compatibility
W
arranty
Te
rminal connection
diagrams
T
erminal specs.
Operation panel
Parameter unit
FR Configurator
37
When setting parameters, refer to the instruction manual (applied) and understand instructions.
When it is desired to avoid resonance attributable to the natural
frequency of a mechanical system, these parameters allow
resonant frequencies to be jumped.

Up to three areas may be set, with the jump frequencies set to either
the top or bottom point of each area.

The value set to 1A, 2A or 3A is a jump point and operation in the
jump zone is performed at these frequencies.
 Frequency jump is not performed if the initial value is set to "9999".

During acceleration/deceleration, the running frequency within the
set area is valid.

By using the Pr.552 setting, a total of six frequency jump ranges can
be set to the Pr.31 to Pr.36 frequency settings.
The monitored item and the frequency setting displayed on the
operation panel and PU (FR-PU07) can be switched among the
motor speed, machine speed, etc.

Each monitor and setting are determined according to the
combination of
Pr. 37 and Pr. 144 . (The units within the thick frame
are the initial values.)
 To display a machine speed, set Pr.37 to the machine speed at the
frequency set in Pr. 505 , and set Pr. 144 to the number of motor poles
(2, 4, 6, 8, 10).

Motor speed r/min conversion formula
.......... Frequency

120/number of motor poles
(Pr.144)
Machine speed conversion formula
..........
Pr.37 
frequency/
Pr.505
setting (Hz)
For
Pr.144
in the above formula, the value is "
Pr.144
- 100" when "102 to
110" is set in
Pr.144
and the value is "4" when
Pr.37
= 0 and
Pr.144
= 0.
Pr.505
is always set as frequency (Hz).
 Used to choose the direction of rotation by operating RUN key of the
operation panel.
The inverter output frequency is detected and output at the
output signals.

If the set frequency is considered as 100%, output frequency can be
adjusted between 0% and

100% with Pr. 41 .

This parameter can be used to ensure that the running frequency
has been reached to provide the operation start signal etc. for
related equipment.

When the output frequency reaches or exceeds the setting of Pr.42 ,
the output frequency detection signal (FU) is output.
This function can be used for electromagnetic brake operation, open
signal, etc.

When the detection frequency is set in Pr.43 , frequency detection for
reverse rotation use only can also be set. This function is effective
for switching the timing of electromagnetic brake operation between
forward rotation (rise) and reverse rotation (fall) during vertical lift
operation, etc.
 Setting a hysteresis width at the output frequency in
Pr.870
prevents
chattering of the speed detection signals.
31 to 36, 552
Avoid mechanical resonance points
(frequency jump)
Pr.31 Frequency jump 1A Pr.32 Frequency jump 1B
Pr.33 Frequency jump 2A Pr.34 Frequency jump 2B
Pr.35 Frequency jump 3A Pr.36 Frequency jump 3B
Pr.552 Frequency jump range
37, 144, 505
Speed display and speed setting
Pr.37 Speed display Pr.144 Speed setting switchover
Pr.505 Speed setting reference
Pr.37
setting
Pr.144
setting
Output
Frequency
Monitor
Set
Frequency
Monitor
Frequency
Setting
Parameter
Setting
0
(initial
value)
2 to 10 0.01Hz 0.01Hz 0.01Hz 0.01Hz
102 to 110 1r/min

1r/min

1r/min

1r/min

0.01 to
9998
2 to10
0.001
(Machine
speed

)
0.001
(Machine
speed

)
0.001
(Machine
speed

)
0.01Hz
102 to 110 0.01Hz 0.01Hz 0.01Hz 0.01Hz
40
RUN key rotation direction selection
Pr.40 RUN key rotation direction selection
Pr.40
setting Description
0 Forward rotation
1 Reverse rotation
Pr. 31
Pr. 32
Pr. 33
Pr. 34
Pr. 35
Pr. 36
Frequency jump
Set frequency (Hz)
41 to 43, 870
Detection of output frequency
(SU, FU signal)
Pr.41 Up-to-frequency sensitivity Pr.42 Output frequency detection
Pr.43 Output frequency detection for reverse rotation
Pr.870 Speed detection hysteresis
44, 45
Refer to the section about Pr.7
46
Refer to the section about Pr.0
47
Refer to the section about Pr.3
48
Refer to the section about
Pr.22
51 Refer to the section about Pr.9
Output frequency (Hz)
ON
Set frequency Adjustment
range
Pr.41
SU
Time
OFF
OFF
Output signal
Forward
rotation
Reverse
rotation
Time
Output frequency (Hz)
ON ON
OFF OFF OFF
FU
Pr.43
Pr.42
Pr.870
Pr.42
Output
frequency
(Hz)
ON
ON
ON
FU
OFF OFF
Example of output frequency detection signal (FU)