Mitsubishi Electric F720PJ-11KF, Руководство пользователя

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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
53
When setting parameters, refer to the instruction manual (applied) and understand instructions.
The average value of the output current during constant speed
operation and the maintenance timer value are output as a pulse
to the current average value monitor signal (Y93).
The pulse width output to the I/O module of the PLC or the like can
be used as a guideline due to abrasion of machines and
elongation of belt and for aged deterioration of devices to know the
maintenance time.
The current average value monitor signal (Y93) is output as pulse
for 20s as 1 cycle and repeatedly output during constant speed
operation.
The vibration (resonance) of the machine during motor operation
can be suppressed.
Set "100%" in
Pr.653 and check the vibration. Lower the setting
gradually and adjust to the point where the vibration is minimum.
This function detects a regeneration status and increases the
frequency to avoid the regeneration status.

Possible to avoid regeneration by automatically increasing the
frequency and continue operation if the fan happens to rotate faster
than the set speed due to the effect of another fan in the same duct.
555 to 557
Current average value monitor signal
Pr.555 Current average time Pr.556 Data output mask time
Pr.557 Current average value monitor signal output reference current
561
Refer to the section about
Pr.9
563, 564 Refer to the section about Pr.52
571 Refer to the section about Pr.13
575 to 577 Refer to the section about Pr.127
611
Refer to the section about Pr.57
653
Machine resonance suppression
Pr.653 Speed smoothing control
Output current average value (A)
1) Data output mask time
When the speed has changed to
constant from acceleration/deceleration,
Y93 signal is not output for
Pr. 556
time.
2) Start pulse
Output as Hi pulse shape for 1s (fixed)
The output currents are averaged during the
time period set in
Pr. 555.
3) Output current average value pulse
The averaged current value is output for 0.5 to 9s
(10 to 180%) during start pulse output.
Signal output time =
Pr. 557
(A)
4) Maintenance timer pulse
The maintenance timer value (
Pr. 503
) is
output as Hi pulse shape for 2 to 9s
(16000h to 72000h)
Signal output time =
40000h
5) End pulse
Output as low pulse
shape for 1 to 16.5s
Time
Y93 signal
1 cycle (20s) Next cycle
Output frequency
From acceleration to constant speed operation
Pr. 503
100h
5s
5s
V/F V/F V/F
GP
MFVC
GP
MFVC
GP
MFVC
665, 882, 883, 885, 886
Regeneration avoidance function
Pr.665 Regeneration avoidance frequency gain
Pr.882 Regeneration avoidance operation selection
Pr.883 Regeneration avoidance operation level
Pr.885 Regeneration avoidance compensation frequency limit value
Pr.886 Regeneration avoidance voltage gain
Pr.
Number
Setting
Range
Description
882
0 (initial
value)
Regeneration avoidance function invalid
1 Regeneration avoidance function valid
2
Regeneration avoidance function valid only
during constant-speed operation
883
300 to
800V
Set the bus voltage level at which regeneration
avoidance operates. When the bus voltage
level is set to low, overvoltage error will be less
apt to occur. However, the actual deceleration
time increases. The set value must be higher
than the power supply voltage

.
885
0 to 30Hz
Set the limit value of frequency which rises at
activation of regeneration avoidance function.
9999 Frequency limit invalid
886
0 to 200%
Adjust responsiveness at activation of
regeneration avoidance. A larger setting will
improve responsiveness to the bus voltage
change. However, the output frequency could
become unstable. When vibration is not
suppressed by decreasing the
Pr. 886 setting, set
a smaller value in Pr. 665 .
665
779
Refer to the section about Pr.117
791, 792
Refer to the section about Pr.7
2
Bus voltage
(VDC)
Regeneration avoidance
operation example for deceleration
Pr. 883
Output
frequency
(Hz)
Time
Time
During regeneration
avoidance function operation