Notch Filter; Torque Detection; Speed Limit During Speed Control; Fault Definition - Mitsubishi Electric FR-A700 Manual

Pr.
Pr.
862, 863

Notch filter

Sensorless Sensorless Sensorless
Pr.862 Notch filter time constant
You can reduce the response level of speed control in the resonance
frequency band of the mechanical system to avoid mechanical
resonance.
Pr.862 Notch filter time constant
Setting 0 1 2 3
Frequency
Invalid 1000 500 333.3 250
Setting 10 11 12 13
Frequency 100 90.9 83.3 76.9
Setting 20 21 22 23
Frequency 50 47.6 45.5 43.5
Setting 30 31 32 33
Frequency 33.3 32.3 31.3 30.3
Setting 40 41 42 43
Frequency
25.0 24.4 23.8 23.3
Setting 50 51 52 53
Frequency
20.0 19.6 19.2 18.9
Setting 60
Frequency
16.7
Pr.863 Notch filter depth
Setting 0 1 2
← →
Depth Deep
Gain -40dB -14dB -8dB
Pr.
Pr.
864

Torque detection

Magnetic flux Magnetic flux Magnetic flux
Pr.864 Torque detection
This function outputs a signal if the motor torque rises to or above
the Pr.864 setting.
The signal is used as operation and open signal for an
electromagnetic brake.
The signal turns on when
the output torque rises to
or above the detection
Pr.864
torque value set in Pr.864.
It turns off when the torque
falls below the detection
TU
torque value.
Pr.
Pr.
865
Refer to the section about Pr.41.
Pr.
Pr.
866
Refer to the section about Pr.55.
Pr. Pr.
867
Refer to the section about Pr.52.
Pr. Pr.
868
Refer to the section about Pr.858.
Pr. Pr.
872
Refer to the section about Pr.251.
Pr.
Pr.
873

Speed limit during speed control

Pr.873 Speed limit
Frequency is limited at the set frequency + Pr.873 during vector
control.
Pr.
Pr.
874
Refer to the section about Pr.22.
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Vector Vector Vector
Pr.863 Notch filter depth
4 5 6 7 8 9
200 166.7 142.9 125 111.1
14 15 16 17 18 19
71.4 66.7 62.5 58.8 55.6 52.6
24 25 26 27 28 29
41.7 40 38.5 37 35.7 34.5
34 35 36 37 38 39
29.4 28.6 27.8 27.0 26.3 25.6
44 45 46 47 48 49
22.7 22.2 21.7 21.3 20.8 20.4
54 55 56 57 58 59
18.5 18.2 17.9 17.5 17.2 16.9
3
Sharrow
-4dB
Sensorless Sensorless Sensorless
Vector Vector Vector
Time
ON OFF
Vector Vector Vector
Pr.
Pr.
875

Fault definition

Pr.875 Fault definition
When the electronic
When Pr.875 = "1"
thermal function is
Output
speed
activated, the motor
decelerates to a stop
and the base circuit is
Alarm output
(ALM, ALM2)
shut off.
Minor fault
output 2
Pr.875
Operation
Setting
0
At occurrence of any alarm, the base circuit is shut off
Normal
(initial
operation
immediately. At this time, the alarm output also turns on.
value)
At occurrence of external thermal operation (OHT),
electronic thermal relay function (THM) or PTC
thermister function (PTC) alarm, the motor is
Fault decelerated to a stop and the base circuit is shut off.
1
definition
At occurrence of an alarm other than OHT, THM and
PTC, the base circuit is shut off immediately.
Same operation as when "0" is set is performed under
position control.
Pr.
Pr.
877 to 881
Refer to the section about Pr.828.
Pr.
Pr.
882 to 886, 665
Regeneration avoidance function
Pr.882 Regeneration avoidance operation selection
Pr.884 Regeneration avoidance at deceleration detection sensitivity
Pr.885 Regeneration avoidance compensation frequency limit value
Pr.886 Regeneration avoidance voltage gain
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.
Pr. Setting
Number Range
0
Regeneration avoidance function invalid
(initial value)
1 Regeneration avoidance function is always valid
882
Regeneraiton avoidance funcion is valid only during a
2
constant speed operation
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.
883 300 to 800V
However, the actual deceleration time increases. The
set value must be higher than the "power supply voltage
×
".
2
Regeneration avoidance by bus voltage change ratio is
0
(initial value)
invalid
Set sensitivity to detect the bus voltage change ratio.
884
1 to 5 Setting
Detection sensitivity
Set the limit value of frequency which rises at activation
0 to 10Hz
of regeneration avoidance function.
885
9999 Frequency limit invalid
Adjust responsiveness at activation of regeneration
avoidance. A larger setting will improve responsiveness
886 0 to 200%
to the bus voltage change. However, the output
frequency could become unstable. When the load
inertia of the motor is large, decrease the Pr. 886
665 0 to 200%
setting.When vibration is not suppressed by decreasing
the Pr.886 setting, set a smaller value in Pr.665.
Regeneration avoidance operation
example for deceleration
Pr.883
During regeneration
avoidance function operation
ON
ON
(ER)
OHT E.OHT
occurrence display
Description
Pr.883 Regeneration avoidance operation level
Pr.665 Regeneration avoidance frequency gain
Description
1 5
low high
Time
Time
72